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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  ____________

                                    FORM 11-K

                 Annual Report Pursuant to Section 15(d) of the
                         Securities Exchange Act of 1934


[X]  ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF
     1934

     For the fiscal year ended December 31, 2006

                                       OR

[ ]  TRANSITION REPORT PURSUANT TO SECTION 15 (d) OF THE SECURITIES EXCHANGE ACT
     OF 1934

     For the transition period from____________to___________


                        Commission File Number 000-28846


         A.       Full title of the plan and the address of the plan, if
                  different from that of the issuer named below:

                        Centrue Bank 401(k) Savings Plan


         B.       Name of issuer of the securities held pursuant to the plan and
                  the address of its principal executive office:

                          Centrue Financial Corporation
                             122 West Madison Street
                             Ottawa, Illinois 61350


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                              REQUIRED INFORMATION


         The following financial statements and schedules of the Centrue Bank
401(k) Savings Plan (the "Plan"), prepared in accordance with the Employee
Retirement Income Security Act of 1974, as amended ("ERISA"), are filed
herewith. Crowe Chizek and Company LLC, the current independent auditors for the
Plan, audited the financial statements and schedules of the Plan as of and for
the fiscal years ended December 31, 2006 and 2005. The consent of Crowe Chizek
and Company LLC is attached as Exhibit 23.1 to this Form 11-K.





                        CENTRUE BANK 401(k) SAVINGS PLAN

                              FINANCIAL STATEMENTS
                           December 31, 2006 and 2005





                        CENTRUE BANK 401(k) SAVINGS PLAN

                              FINANCIAL STATEMENTS
                           December 31, 2006 and 2005

                                    CONTENTS


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM.....................   1


FINANCIAL STATEMENTS

     STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS........................   2

     STATEMENT OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS..............   3

     NOTES TO FINANCIAL STATEMENTS..........................................   4


SUPPLEMENTAL SCHEDULES

     SCHEDULE H, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR) -
       DECEMBER 31, 2006....................................................   9

     SCHEDULE H, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR) -
       DECEMBER 31, 2005....................................................  10




                        CENTRUE BANK 401(k) SAVINGS PLAN

             REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM


To the Administrative Committee of
  Centrue Bank 401(k) Savings Plan


We have audited the accompanying statements of net assets available for benefits
of Centrue Bank 401(k) Savings Plan as of December 31, 2006 and 2005, and the
related statement of changes in net assets available for benefits for the year
ended December 31, 2006. These financial statements are the responsibility of
the Plan's management. Our responsibility is to express an opinion on these
financial statements based on our audits.

We conducted our audits in accordance with the standards of the Public Company
Accounting Oversight Board (United States). Those standards require that we plan
and perform the audit to obtain reasonable assurance about whether the financial
statements are free of material misstatement. An audit includes examining, on a
test basis, evidence supporting the amounts and disclosures in the financial
statements. An audit also includes assessing the accounting principles used and
significant estimates made by management, as well as evaluating the overall
financial statement presentation. We believe that our audits provide a
reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in
all material respects, the net assets available for benefits of the Plan as of
December 31, 2006 and 2005, and the changes in net assets available for benefits
for the year ended December 31, 2006 in conformity with U.S. generally accepted
accounting principles.

Our audits were conducted for the purpose of forming an opinion on the basic
financial statements taken as a whole. The 2006 and 2005 supplemental schedules
of assets (held at end of year) are presented for the purpose of additional
analysis and are not a required part of the basic financial statements but are
supplementary information required by the Department of Labor's Rules and
Regulations for Reporting and Disclosure under the Employee Retirement Income
Security Act of 1974. The supplemental schedules are the responsibility of the
Plan's management. The supplemental schedules have been subjected to the
auditing procedures applied in the audits of the basic financial statements and,
in our opinion, are fairly stated in all material respects in relation to the
basic financial statements taken as a whole.


                                       /s/ Crowe Chizek and Company LLC
                                       --------------------------------
                                       Crowe Chizek and Company LLC

Oak Brook, Illinois
June 26, 2007





                        CENTRUE BANK 401(k) SAVINGS PLAN
                 STATEMENTS OF NET ASSETS AVAILABLE FOR BENEFITS
                           December 31, 2006 and 2005

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                                                          2006            2005
                                                      ------------    ------------
                                                                
ASSETS
Investments, at fair value (Note 4)                   $  5,678,383    $  7,529,575
Cash                                                        31,483              --
Accrued income                                               1,089             422
                                                      ------------    ------------
     Total assets                                        5,710,955       7,529,997

Net assets reflecting all investments at fair value      5,710,955       7,529,997

Adjustment from fair value to contract value
  for fully benefit-responsive contracts                    14,189          13,210
                                                      ------------    ------------

NET ASSETS AVAILABLE FOR BENEFITS                     $  5,725,144    $  7,543,207
                                                      ============    ============



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                 See accompanying notes to financial statements.

                                                                              2.

                        CENTRUE BANK 401(k) SAVINGS PLAN
            STATEMENT OF CHANGES IN NET ASSETS AVAILABLE FOR BENEFITS
                      For the year ended December 31, 2006

--------------------------------------------------------------------------------


Additions to net assets attributed to:
     Investment income
         Net depreciation in fair value
           of investments (Note 4)                              $   (424,461)
         Interest                                                      9,176
         Dividends                                                   258,751
                                                                ------------
              Total investment income                               (156,534)

     Contributions
         Participants'                                               351,598
         Employer's                                                  149,202
         Rollovers                                                     8,512
                                                                ------------
              Total contributions                                    509,312
                                                                ------------

                  Total additions to net assets                      352,778

Deductions from net assets attributed to:
     Benefits paid to participants                                 2,169,691
     Administrative expenses                                           1,150
                                                                ------------
         Total deductions                                          2,170,841
                                                                ------------

Net decrease                                                      (1,818,063)

Net assets available for benefits
     Beginning of year                                             7,543,207
                                                                ------------

     End of year                                                $  5,725,144
                                                                ============

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                 See accompanying notes to financial statements.

                                                                              3.


                        CENTRUE BANK 401(k) SAVINGS PLAN
                          NOTES TO FINANCIAL STATEMENTS
                           December 31, 2006 and 2005

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NOTE 1 - DESCRIPTION OF PLAN

The following description of the Centrue Bank 401(k) Savings Plan (the "Plan")
provides only general information. Participants should refer to the plan
agreement for a more complete description of the Plan's provisions.

General: The Plan is a defined contribution plan that covered all employees of
Centrue Financial Corporation (the "Company") and its participating subsidiaries
that completed 90 days of service. It is subject to the provisions of the
Employee Retirement Income Security Act of 1974 (ERISA).

Contributions: Prior to the Plan's termination, participants contributed up to
50% of pretax annual compensation, subject to certain dollar limitations, as
defined in the Plan. Participants who attained age 50 before the end of the plan
year were eligible to make catch-up contributions. Participants also contribute
amounts representing distributions from other qualified defined benefit or
contribution plans. Participants directed the investment of their contributions
into various investment options offered by the Plan. The Plan offers an array of
mutual funds, a common collective trust fund, and employer stock as investment
options for participants. The Company contributed 50% of the first 6% of base
compensation that a participant contributed to the Plan. The matching company
contribution was invested as the participant directed. Additional profit sharing
amounts could be contributed at the option of the Company's Board of Directors.
No profit sharing contributions were made for 2006. Contributions subject to
certain limitations.

Plan Termination: Effective November 2006, Centrue Financial Corporation merged
with Union Bancorp, Inc. As a result, Plan management decided to terminate the
Plan as of November 10, 2006. Therefore, the last participant and company
contributions to the plan were on November 10, 2006. Participants still make
contributions in the form of loan repayments. Eligible participants began to
remit contributions in November 2006 to the Centrue Bank 401(k) Profit Sharing
Plan and Trust, formerly known as, the Union Bancorp 401(k) Profit Sharing Plan.
The Plan will continue to exist until all participants are able to receive their
benefits from the Plan.

Participant Accounts: Each participant's account was credited with the
participant's contribution and allocations of the Company's contribution and is
credited with an allocation of plan earnings and charged with an allocation of
administrative expenses. Allocations are based on participant earnings or
account balances, as defined. The benefit to which a participant is entitled is
the benefit that can be provided from the participant's vested account.

--------------------------------------------------------------------------------

                                   (Continued)

                                                                              4.

                        CENTRUE BANK 401(k) SAVINGS PLAN
                          NOTES TO FINANCIAL STATEMENTS
                           December 31, 2006 and 2005

--------------------------------------------------------------------------------

NOTE 1 - DESCRIPTION OF PLAN (Continued)

Vesting: Participants are immediately vested in their contributions plus actual
earnings thereon. Participants were 100% vested for any company contributions
when the Plan was terminated on November 10, 2006.

Payment of Benefits: On termination of service that is due to death, disability,
or retirement, a participant may elect to receive either a lump-sum amount equal
to the value of the participant's vested interest in his or her account or
annual installments over a period not to exceed limitations as set forth by the
applicable sections of the Internal Revenue Code. For termination of service
that is due to other reasons, a participant may receive the value of the vested
interest in his or her account as a lump-sum distribution.

Forfeited Accounts: At December 31, 2006 and 2005, forfeited nonvested accounts
totaled $78,545 and $47,532, respectively. Also, in 2006, employer contributions
were reduced by $9,620 from forfeited nonvested accounts. Since the last
participant and company contributions to the plan were on November 10, 2006, the
Plan's forfeited accounts will be allocated to the remaining participants.

Participant Loans: Participants were allowed to borrow from their fund accounts
a minimum of $1,000 up to a maximum equal to the lesser of $50,000 or 50% of
their account balance. The loans are secured by the balance in the participant's
account and bear interest at rates that are set at the prime rate as listed on
the last business day or each month in the Wall Street Journal plus 1%. The
interest rate will be fixed on the day the loan is requested and will remain
constant during the term of the loan. Principal and interest is paid ratably
through monthly payroll deductions.


NOTE 2 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

Basis of Accounting: As a result of the Company's decision to terminate the Plan
in November 2006, the Plan changed its basis of accounting from the ongoing
accrual basis to the liquidation basis of accounting for the year ended December
31, 2006. The change to the liquidation basis has no effect on the net assets
available for benefits of the Plan.

Estimates: The preparation of financial statements in conformity with U.S.
generally accepted accounting principles requires the plan administrator to make
estimates and assumptions that affect certain reported amounts and disclosures.
Accordingly, actual results may differ from those estimates.

--------------------------------------------------------------------------------

                                  (Continued)

                                                                              5.

                        CENTRUE BANK 401(k) SAVINGS PLAN
                          NOTES TO FINANCIAL STATEMENTS
                           December 31, 2006 and 2005

--------------------------------------------------------------------------------

NOTE 2 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Investment Valuation and Income Recognition: The Plan's investments are stated
at fair value. The Plan's investments in mutual funds are valued at quoted
market prices which represent the net asset value of shares held by the Plan at
year end. The Company stock is valued at its quoted market price. The fair
values of the Plan's interest in the common collective trust fund is bases upon
the net asset values of such funds reflecting all investments at fair value,
including direct and indirect interests in fully benefit-responsive contracts,
as reposted by the Plan's trustee. Participant loans are valued at cost, which
approximates fair value.

Purchases and sales of securities are recorded on a trade-date basis. Interest
income is recorded on the accrual basis. Dividends are recorded on the
ex-dividend date.

Payment of Benefits:  Benefits are recorded when paid.

Adoption of New Accounting Standard: The Plan retroactively adopted Financial
Accounting Standards Board (FASB) Staff Position AAG INV-1 and SOP 94-4-1,
Reporting of Fully Benefit-Responsive Investment Contracts Held by the Certain
Investment Companies Subject to the AICPA Investment Company Guide and
Defined-Contribution Health and Welfare and Pension Plans ("the FSP") in 2006.
Pursuant to the adoption of the FSP, fully benefit-responsive investment
contracts included in the underlying investments of common collective trust
funds in which the Plan holds an interest are to be presented at fair value. In
addition, any material difference between the fair value of these investments
and their contract value is to be presented as a separate adjustment line in the
statement of net assets available for benefits, because contract value remains
the relevant measurement attribute for that portion of net assets available for
benefits attributable to fully benefit-responsive investment contracts.
Accordingly, the adoption of the FSP had no impact on the net assets available
for benefits as of December 31, 2005. The net depreciation reported in the
Plan's statement of changes in net assets available for benefits has not been
impacted by the adoption of the FSP either, as the amount reflect the contract
value of fully benefit-responsive contracts held directly or indirectly by the
Plan.

Adoption of the FSP resulted in a decrease of $13,210 from the amount previously
reported as Plan investments in the 2005 statement of net assets available for
benefits, since this amount now reflects the fair value of the plan's indirect
interests in fully benefit-responsive contracts. The decrease in the amount
reported for Plan investments as of December 31, 2005 is completely offset by an
adjustment which reduces net assets reflecting investments at fair value to net
assets available for benefit.

Administrative Costs: It has been the policy of the plan sponsor to absorb most
of the administrative costs of the Plan.

--------------------------------------------------------------------------------

                                  (Continued)

                                                                              6.

                        CENTRUE BANK 401(k) SAVINGS PLAN
                          NOTES TO FINANCIAL STATEMENTS
                           December 31, 2006 and 2005

--------------------------------------------------------------------------------

NOTE 2 - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Continued)

Concentration of Credit Risk: At December 31, 2006 and 2005, approximately 35%
and 43%, respectively, of the Plan's investment assets were invested in Centrue
Financial Corporation common stock.


NOTE 3 - TAX STATUS

The Internal Revenue Service has determined and informed the Company by a letter
dated June 4, 2002, that the Plan and related trust are designed in accordance
with applicable sections of the Internal Revenue Code. The Plan has been amended
since receiving the determination letter. However, the Plan administrator and
the Plan's tax counsel believe that the Plan is designed and currently being
operated in compliance with the applicable requirements of the Internal Revenue
Code. Therefore, no provision for income taxes has been included in the Plan's
financial statements.


NOTE 4 - INVESTMENTS

The following investments represented 5% or more of the Plan's net assets:

                                                     2006           2005
                                                 ------------   ------------
    Merrill Lynch Preservation Trust             $    761,297   $    752,291
    Blackrock Large Cap Fund                          401,404        570,259
    Blackrock Govt Inc Fund                           519,447        509,945
    ING Int Value Fund                                369,521              *
    Centrue Financial Corporation Stock             1,996,272      3,215,527
    Calvert Income Fund                               504,363        780,051

* Did not meet 5% threshold

During 2006, the Plan's investments (including investments bought, sold, and
held during the year) appreciated (depreciated) in value as follows:

Investments at fair value as determined by quoted
  market price:
    Mutual funds                                                 $    180,664
    Centrue Financial Corporation stock                              (605,125)
                                                                 ------------
         Net change in fair value                                $   (424,461)
                                                                 ============


--------------------------------------------------------------------------------

                                  (Continued)

                                                                              7.

                        CENTRUE BANK 401(k) SAVINGS PLAN
                          NOTES TO FINANCIAL STATEMENTS
                           December 31, 2006 and 2005

--------------------------------------------------------------------------------

NOTE 5 - PARTIES IN INTEREST TRANSACTIONS

Parties in interest are defined under Department of Labor regulations as any
fiduciary of the Plan, any party rendering service to the Plan, the employer,
and certain others. Certain plan investments are shares of mutual funds managed
by Merrill Lynch. Merrill Lynch is the administrator and custodian as defined by
the Plan and, therefore, these transactions qualify as party-in-interest
transactions. Fees paid by the Plan for administrative costs totaled $1,150 for
the year ended December 31, 2006.

The Plan also allows participants to invest their account balances in shares of
Centrue Financial Corporation common stock. The number of shares of Company
common stock held by the Plan at December 31, 2006 and 2005 was 102,531 shares
and 121,662 shares, respectively. The fair value of these shares at December 31,
2006 and 2005 was $1,996,272 and $3,215,527, respectively. No dividends were
paid on these shares during the year ended December 31, 2006. These transactions
also qualify as party-in-interest transactions.

The Plan also allows participants to take loans from their accounts in the Plan.
These investments also qualify as party-in-interest and totaled $90,924 and
$141,082 at December 31, 2006 and 2005, respectively.


NOTE 6 - RISKS AND UNCERTAINTIES

The Plan invests in various investment securities. Investment securities are
exposed to various risks such as interest rate, market, and credit risks. Due to
the level of risk associated with certain investment securities, it is at least
reasonably possible that changes in the values of investment securities will
occur in the near term and that such changes could materially affect
participants' account balances and the amounts reported in the statement of net
assets available for benefits.

--------------------------------------------------------------------------------

                                                                              8.




                             SUPPLEMENTAL SCHEDULES







                        CENTRUE BANK 401(k) SAVINGS PLAN
         SCHEDULE H, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)
                                December 31, 2006

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Name of Plan Sponsor:  Centrue Financial Corporation
Employer Identification Number:  37-0532590
Three-Digit Plan Number:  002

                                                    (c)
             (b)                          Description of Investment
       Identity of Issue,                  Including Maturity Date,                                      (e)
        Borrower, Lessor,                Rate of Interest, Collateral,                 (d)            Current
(a)     or Similar Party                   Par, or Maturity Value                     Cost**           Value
---    -----------------                   ----------------------                     ------           -----
                                                                                         
                                        Common Stock
                                        ------------
 *    Centrue Financial
        Corporation                     102,530.6649 shares                                      $    1,996,272

                                        Common/Collective Trust
                                        -----------------------

 *    Merrill Lynch                     Merrill Lynch Preservation Trust;
                                          761,297.0335 shares                                           761,297

                                        Mutual Funds
                                        ------------

      Alger                             Midcap Growth Fund; 6256.443 shares                             105,921
      BlackRock                         Large Cap Core A Fund; 28,610.4449 shares                       401,404
      Prudential                        Strategic Partner Fund; 5814.0025 shares                        106,047
      American                          AmCap Fund CL R3 Fund; 7,694.2504 shares                        152,500
      ING                               Intl Value Fund A; 5,156 shares                                 106,125
      ING                               Intl Value Fund A GM; 17,955.3882 shares                        369,521
      Davis                             Series Financial Fund; 259.0505 shares                           12,299
      Blackrock                         Blackrock Healthcare A Fund; 8,397.017 shares                    49,290
      Blackrock                         Blackrock EQ Dividend A Fund; 11,759.715 shares                 213,087
      Blackrock                         MDCP Value Opp A Fund; 8881.025 shares                          158,793
      PIMCO                             Real Return Bond Fund; 1,123.9532 shares                         11,971
      Blackrock                         Government Inc A Fund; 48,365.56 shares                         519,447
      Fidelity                          Fidelity Adv Small Cap Fund; 95.0425 shares                       2,105
      Fidelity                          Fidelity Adv Small Cap T Fund; 2,257.6783 shares                 49,987
      VanKampen                         Comstock Fund; 4,219.1486 shares                                 81,219
      Calvert                           Income Fund; 30,075.347 shares                                  504,363

                                        Participants Loans
                                        ------------------

*     Participants Loans                Interest rates ranging from 6.75% to 9.25%,
                                          maturing through September 11, 2011                            90,924
                                                                                                 --------------
                                                                                                 $    5,692,572
                                                                                                 ==============


*  Party in interest
**Investments are participant-directed.  Cost is not required to be presented.

                                                                              9.




                        CENTRUE BANK 401(k) SAVINGS PLAN
         SCHEDULE H, LINE 4i - SCHEDULE OF ASSETS (HELD AT END OF YEAR)
                                December 31, 2005

--------------------------------------------------------------------------------

Name of Plan Sponsor:  Centrue Financial Corporation
Employer Identification Number:  37-0532590
Three-Digit Plan Number:  002

                                                    (c)
             (b)                          Description of Investment
       Identity of Issue,                  Including Maturity Date,                                      (e)
        Borrower, Lessor,                Rate of Interest, Collateral,                 (d)            Current
(a)     or Similar Party                   Par, or Maturity Value                     Cost**           Value
---    -----------------                   ----------------------                     ------           -----
                                                                                         

                                        Common Stock
                                        ------------
*     Centrue Financial
        Corporation                     121,662.0007 shares                                      $    3,215,527

                                        Common/Collective Trust
                                        -----------------------

*     Merrill Lynch                     Merrill Lynch Preservation Trust;
                                          752,290.9597 shares                                           752,291

                                        Mutual Funds
                                        ------------

*     Merrill Lynch                     Basic Value Fund; 16,492.4041 shares                            509,945
*     Merrill Lynch                     Healthcare Fund; 5,770.6346 shares                               38,894
*     Merrill Lynch                     U.S. Government Fund; 10,843.8479 shares                        109,198
      Phoenix                           Phoenix-Large-Cap Growth Fund;
                                          388.0284 shares                                                 4,505
*     Merrill Lynch                     Value Opportunities Fund; 10,127.2715 shares                    259,157
*     Merrill Lynch                     Mid Cap Value Fund; 5,193.8903 shares                            95,671
      PIMCO                             Real Return Bond Fund; 5,107.0370 shares                         56,586
      Blackrock                         Blackrock Aurora Portfolio; 669.7928 shares                      22,900
      MFS                               MFS New Discovery Fund; 13,637.0233 shares                      234,011
      Oppenheimer                       Quest Balanced Fund; 8,932.4746 shares                          159,534
      VanKampen                         Comstock Fund; 9,598.3069 shares                                170,946
*     Merrill Lynch                     Fundamental Growth Fund; 30,430.0288 shares                     570,259
      ING                               International Value Fund; 17,140.2922 shares                    306,468
      Calvert                           Income Fund; 46,542.4101 shares                                 780,051
      Davis                             Financial Fund; 111.4214 shares                                   4,724
      Seligman                          Capital Fund; 3,138.0597 shares                                  66,841
      Van Kampen                        Equity & Income Fund; 5,091.5744 shares                          44,195

                                        Participants Loans
                                        ------------------

*     Participants Loans                Interest rates ranging from 6.75% to 8.00%                      141,082
                                                                                                 --------------

                                                                                                 $    7,542,785
                                                                                                 ==============


*  Party in interest
**Investments are participant-directed.  Cost is not required to be presented.

                                                                             10.


                                   SIGNATURES


         Pursuant to the requirements of the Securities Exchange Act of 1934,
the trustees (or other persons who administer the employee benefit plan) have
duly caused this annual report to be signed on its behalf by the undersigned
hereunto duly authorized.


                                      CENTRUE FINANCIAL CORPORATION
                                      401(k) PROFIT SHARING PLAN

Date:  June 28, 2007                  By: /s/ THOMAS A. DAIBER
                                          -------------------------------------
                                          Thomas A. Daiber
                                          President and
                                          Chief Executive Officer



                        CENTRUE BANK 401(k) SAVINGS PLAN

                                  EXHIBIT INDEX
                                       TO
                           ANNUAL REPORT ON FORM 11-K


Exhibit
  No.                      Description
--------------------------------------------------------------------------------

23.1                       Consent of Crowe Chizek and Company LLC