UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM N-Q

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED
MANAGEMENT INVESTMENT COMPANY

Investment Company Act file number: 811-02319
______________________________________________

Fort Dearborn Income Securities, Inc.
______________________________________________________________________________
(Exact name of registrant as specified in charter)

51 West 52nd Street, New York, New York 10019-6114
______________________________________________________________________________
(Address of principal executive offices) (Zip code)

Mark F. Kemper, Esq.
UBS Global Asset Management (Americas) Inc.
51 West 52nd Street
New York, NY 10019-6114
(Name and address of agent for service)
 
Copy to:
Bruce G. Leto, Esq.
Stradley Ronon Stevens & Young LLP
2600 One Commerce Square
Philadelphia, PA 19103

Registrant’s telephone number, including area code: 212-882 5000

Date of fiscal year end: September 30

Date of reporting period: December 31, 2006


Item 1. Schedule of Investments

Fort Dearborn Income Securities, Inc.
Porfolio of investments — December 31, 2006 (unaudited)
    Face      
    amount   Value
   
 
Bonds — 96.62%            
US bonds — 90.36%            
US corporate bonds — 56.00%            
Allergan, Inc.            
5.750%, due 04/01/16   $ 2,370,000   $ 2,396,847
American General Finance Corp.            
5.375%, due 10/01/12     370,000     368,974
AT&T Corp. (1)            
8.000%, due 11/15/31     860,000     1,066,983
AT&T, Inc.            
6.450%, due 06/15/34     995,000     1,009,752
Bank of America Corp., 144A            
5.420%, due 03/15/17     1,900,000     1,885,284
Bank One Corp.            
7.875%, due 08/01/10     815,000     884,039
BellSouth Corp.            
6.550%, due 06/15/34     1,015,000     1,040,500
Bristol-Myers Squibb Co.            
5.875%, due 11/15/36     850,000     836,424
Burlington Northern Santa Fe Corp.            
6.875%, due 12/01/27     120,000     132,102
7.082%, due 05/13/29     740,000     836,793
C.S. First Boston USA, Inc.            
6.500%, due 01/15/12     1,105,000     1,161,278
Capital One Financial Corp.            
5.500%, due 06/01/15     1,405,000     1,404,032
Cisco Systems, Inc.            
5.500%, due 02/22/16     400,000     400,255
CIT Group, Inc.            
7.750%, due 04/02/12     140,000     154,351
Citigroup, Inc.            
5.000%, due 09/15/14     1,882,000     1,837,579
5.625%, due 08/27/12     815,000     826,792
Citizens Communications Co.            
9.000%, due 08/15/31     585,000     634,725
Comcast Corp.            
7.050%, due 03/15/33     1,300,000     1,390,089
Coors Brewing Co.            
6.375%, due 05/15/12     350,000     362,185
CRH America, Inc.            
6.000%, due 09/30/16     700,000     706,576
DaimlerChrysler N.A. Holding Corp.            
8.500%, due 01/18/31     845,000     1,005,916
Devon Financing Corp. ULC            
7.875%, due 09/30/31     1,460,000     1,756,564
Dominion Resources, Inc., Series B            
5.950%, due 06/15/35     495,000     486,649
DTE Energy Co.            
6.350%, due 06/01/16     705,000     732,344
Duke Capital LLC            
5.668%, due 08/15/14     345,000     344,066
EOP Operating LP            
7.250%, due 06/15/28     700,000     767,123
Erac USA Finance Co., 144A            
8.000%, due 01/15/11     1,065,000     1,161,397
Exelon Generation Co. LLC            
5.350%, due 01/15/14     1,015,000     994,183
Ford Motor Credit Co.            
5.800%, due 01/12/09     6,090,000     5,979,424
Fortune Brands, Inc.            
5.375%, due 01/15/16     1,090,000     1,033,548
General Electric Capital Corp.            
6.000%, due 06/15/12     1,730,000     1,790,846
6.750%, due 03/15/32     1,150,000     1,317,070
General Motors Acceptance Corp.            
6.875%, due 09/15/11     2,340,000     2,400,133
Goldman Sachs Group, Inc.            
6.125%, due 02/15/33     440,000     448,344
6.875%, due 01/15/11     1,685,000     1,783,692
HSBC Bank USA N.A.            
5.625%, due 08/15/35     855,000     823,777

    Face      
    amount   Value
   
 
US corporate bonds — (continued)            
HSBC Finance Corp.            
6.750%, due 05/15/11   $ 1,165,000   $ 1,232,966
ICI Wilmington, Inc.            
5.625%, due 12/01/13     850,000     839,279
Johnson Controls, Inc.            
5.500%, due 01/15/16     700,000     686,344
JPMorgan Chase & Co.            
6.750%, due 02/01/11     955,000     1,004,001
Kinder Morgan Energy Partners LP            
5.125%, due 11/15/14     580,000     552,391
5.800%, due 03/15/35     1,080,000     981,438
Kraft Foods, Inc.            
5.625%, due 11/01/11     760,000     768,078
Kroger Co.            
7.500%, due 04/01/31     650,000     729,552
Lockheed Martin Corp., Series B            
6.150%, due 09/01/36     505,000     530,573
MBNA Corp.            
7.500%, due 03/15/12     550,000     602,467
Merck & Co., Inc.            
6.400%, due 03/01/28     520,000     555,717
Metlife, Inc.            
6.400%, due 12/15/36     210,000     210,967
Morgan Stanley            
6.750%, due 04/15/11     1,675,000     1,770,428
7.250%, due 04/01/32     355,000     416,940
National City Bank            
4.625%, due 05/01/13     360,000     346,774
New Cingular Wireless Services, Inc.            
8.750%, due 03/01/31     945,000     1,228,089
News America, Inc.            
6.200%, due 12/15/34     810,000     781,824
Norfolk Southern Corp.            
5.257%, due 09/17/14     245,000     242,783
Northrop Grumman Corp.            
7.125%, due 02/15/11     425,000     453,330
Occidental Petroleum Corp.            
8.450%, due 02/15/29     265,000     347,845
Pacific Gas & Electric Co.            
6.050%, due 03/01/34     540,000     544,631
Pitney Bowes, Inc.            
4.625%, due 10/01/12     300,000     288,989
PPL Energy Supply LLC            
6.000%, due 12/15/36     370,000     356,800
Progressive Corp.            
6.250%, due 12/01/32     275,000     291,850
Prologis REIT            
5.625%, due 11/15/15     825,000     820,934
PSEG Power LLC            
8.625%, due 04/15/31     695,000     887,749
Qwest Capital Funding, Inc.            
7.900%, due 08/15/10     590,000     614,338
Residential Capital Corp.            
6.875%, due 06/30/15     660,000     684,213
Safeway, Inc.            
7.250%, due 02/01/31     645,000     700,102
Simon Property Group LP, REIT            
5.375%, due 06/01/11     300,000     300,035
SLM Corp.            
5.125%, due 08/27/12     115,000     112,998
Sprint Capital Corp.            
8.750%, due 03/15/32     1,330,000     1,600,803
Target Corp.            
7.000%, due 07/15/31     305,000     352,775
Teva Pharmaceutical Finance LLC            
5.550%, due 02/01/16     430,000     420,465
Time Warner, Inc.            
7.625%, due 04/15/31     695,000     776,427
Travelers Property Casualty Corp.            
6.375%, due 03/15/33     350,000     368,620
TXU Energy Co. LLC            
7.000%, due 03/15/13     800,000     837,086

    Face      
    amount   Value
   
 
US corporate bonds — (concluded)            
US Bank N.A.            
6.375%, due 08/01/11   $ 500,000   $ 521,946
Union Pacific Corp.            
6.650%, due 01/15/11     470,000     491,212
Valero Energy Corp.            
7.500%, due 04/15/32     875,000     998,289
Verizon New York, Inc., Series B            
7.375%, due 04/01/32     1,085,000     1,120,276
Wachovia Bank N.A.            
7.800%, due 08/18/10     1,620,000     1,742,556
Washington Mutual Bank            
6.750%, due 05/20/36     500,000     536,930
Washington Mutual Preferred Funding Delaware, 144A (2)(3)            
6.534%, due 03/15/11     2,100,000     2,075,850
WellPoint, Inc.            
5.850%, due 01/15/36     1,075,000     1,044,304
Wells Fargo Bank N.A.            
5.950%, due 08/26/36     1,380,000     1,412,347
Weyerhaeuser Co.            
7.375%, due 03/15/32     665,000     694,144
Wyeth            
5.500%, due 03/15/13     700,000     704,529
         
Total US corporate bonds (cost $75,252,020)           77,743,620
         
Asset-backed securities — 3.57%            
Conseco Finance Securitizations Corp., 00-2, Class A4            
8.480%, due 12/01/30     50,980     51,010
Conseco Finance Securitizations Corp., 00-5, Class A5            
7.700%, due 02/01/32     1,070,421     1,068,795
CPL Transition Funding LLC, 02-1, Class A5            
6.250%, due 01/15/17     3,000,000     3,214,628
Small Business Administration, 04-P10B, Class 1            
4.754%, due 08/10/14     636,708     619,721
         
Total asset-backed securities (cost $4,999,157)           4,954,154
         
Mortgage & agency debt securities — 10.11%            
C.S. First Boston Mortgage Securities Corp., 03-8, Class 5A1            
6.500%, due 04/25/33     107,311     107,424
Federal Home Loan Mortgage Corp.            
5.000%, due 01/30/14     30,000     29,873
Federal Home Loan Mortgage Corp., Gold            
5.500%, due 10/01/19     669,327     669,445
6.500%, due 02/01/17     196,113     200,683
Federal National Mortgage Association            
4.250%, due 08/15/10     1,380,000     1,349,505
4.375%, due 03/15/13     415,000     401,715
5.500%, due 03/01/33     432,309     427,991
5.500%, due 09/01/34     2,064,751     2,042,615
5.500%, due 11/01/34     357,666     353,832
6.000%, due 06/01/23     194,133     196,569
6.000%, due 11/01/28     280,568     284,102
6.070%, due 05/12/16     190,000     191,246
6.250%, due 02/01/11     1,370,000     1,427,729
6.625%, due 11/15/30     1,500,000     1,789,947
7.000%, due 03/01/31     128,477     132,646
Federal National Mortgage Association Grantor Trust, 02-T19, Class A1            
6.500%, due 07/25/42     417,996     426,664
Federal National Mortgage Association, 93-106, Class Z, REMIC            
7.000%, due 06/25/13     44,098     45,462
Government National Mortgage Association            
6.500%, due 05/15/29     91,057     93,652
GSR Mortgage Loan Trust, 06-2F, Class 3A4            
6.000%, due 02/25/36     1,300,000     1,288,137
Residential Funding Mortgage Securitization I, 06-S6, Class M2            
6.000%, due 07/25/36     1,295,933     1,267,989
Wells Fargo Mortgage Backed Securities Trust, 03-18, Class A2            
5.250%, due 12/25/33     1,354,318     1,307,086
         
Total mortgage & agency debt securities (cost $14,181,407)           14,034,312
         

    Face      
    amount   Value
   
 
Municipal notes and bonds — 3.61%            
Illinois State Taxable Pension            
5.100%, due 06/01/33   $ 2,350,000   $ 2,249,467
New Jersey Economic Development Authority, Series B            
3.183%, due 02/15/18 (4)     5,000,000     2,760,250
         
Total municipal notes and bonds (cost $4,358,174)           5,009,717
         
US government obligations — 17.07%            
US Treasury Bonds            
4.500%, due 02/15/36     5,535,000     5,263,442
6.250%, due 08/15/23     190,000     218,693
8.125%, due 08/15/21     190,000     253,576
US Treasury Inflation Indexed Bonds (TIPS)            
2.000%, due 07/15/14     315,986     306,691
2.000%, due 01/15/26     1,892,141     1,779,500
US Treasury Notes            
3.500%, due 05/31/07     1,970,000     1,957,918
4.625%, due 10/31/11     430,000     428,438
4.875%, due 08/31/08     3,105,000     3,104,758
4.875%, due 10/31/08     3,265,000     3,266,531
5.125%, due 06/30/11     930,000     945,694
US Treasury Strips            
1.858%, due 08/15/26 (4)     16,160,000     6,178,954
         
Total US government obligation (cost $23,216,532)           23,704,195
         
Total US bonds (cost $122,007,290)           125,445,998
         
International bonds — 6.26%            
International corporate bonds — 5.91%            
Canada — 1.20%            
Anadarko Finance Co., Series B            
6.750%, due 05/01/11     325,000     340,670
Bombardier, Inc., 144A            
6.750%, due 05/01/12     1,020,000     999,600
Canadian National Railway Co.            
6.900%, due 07/15/28     285,000     324,213
         
            1,664,483
         
Cayman Islands — 2.51%            
Augusta Funding Ltd. VI            
7.375%, due 04/15/13     2,360,372     2,471,752
Transocean, Inc.            
7.500%, due 04/15/31     900,000     1,018,628
         
            3,490,380
         
Luxembourg — 1.03%            
Telecom Italia Capital S.A.            
6.375%, due 11/15/33     1,520,000     1,436,138
         
United Kingdom — 1.17%            
Abbey National PLC            
7.950%, due 10/26/29     750,000     949,651
SABMiller PLC, 144A            
6.500%, due 07/01/16     650,000     678,032
         
            1,627,683
         
Total international corporate bonds (cost $7,907,762)           8,218,684
         
Sovereign/supranational bond — 0.35%            
Pemex Project Funding Master Trust            
8.000%, due 11/15/11 (cost $466,560)     440,000     485,100
         
Total international bonds (cost $8,374,322)           8,703,784
         
Total bonds (cost $130,381,612)           134,149,782
         

    Shares   Value
   
 
Short-term investment (5) — 2.31%            
Other — 2.31%            
UBS Supplementary Trust —            
U.S. Cash Management Prime Fund, yield of            
5.35%, (6) (Cost $3,199,150)     3,199,150   $ 3,199,150
         
Total investments (7) (cost $133,580,762) — 98.93%           137,348,932
Cash and other assets, less liabilities — 1.07%           1,491,480
         
Net assets — 100.00%         $ 138,840,412
         

Notes to schedule of investments
Aggregate cost for federal income tax purposes which was substantially the same for book purposes, was $133,580,762; and net unrealized appreciation consisted of:

Gross unrealized appreciation   $ 4,619,494  
Gross unrealized depreciation     (851,324 )
   
 
Net unrealized appreciation   $ 3,768,170  
   
 

(1)   Step Bond — Coupon rate increases in increments to maturity. Rate disclosed as of December 31, 2006. Maturity date disclosed is the ultimate maturity date.
(2)   Floating rate securities — The interest rates shown are the current rates as of December 31, 2006.
(3)   Perpetual bond security. The maturity date reflects the next call date.
(4)   Rates shown reflects annualized yield at December 31, 2006 on zero coupon bonds.
(5)   Security is issued by a fund that is advised by a related entity of UBS Global Asset Management (Americas) Inc., Fort Dearborn Income Securities, Inc.’s advisor.
(6)   Interest rate reflects yield at December 31, 2006.
(7)   The Fund calculates its net asset value based on the current market value, where available, for its portfolio securities. The Fund normally obtains market values for its securities from independent pricing sources and broker-dealers. Independent pricing sources may use reported last sale prices, current market quotations or valuations from computerized “matrix” systems that derive values based on comparable securities. A matrix system incorporates parameters such as security quality, maturity and coupon, and/or research and evaluations by its staff, including review of broker-dealer market price quotations, if available, in determining the valuation of the portfolio securities. Securities traded in the over-the-counter (“OTC”) market and listed on The Nasdaq Stock Market, Inc. (“NASDAQ”) normally are valued at the NASDAQ Official Closing Price. Other OTC securities are valued at the last bid price on the valuation date available prior to valuation. Securities which are listed on US and foreign stock exchanges normally are valued at the last sale price on the day the securities are valued or, lacking any sales on such day, at the last available bid price. In cases where securities are traded on more than one exchange, the securities are valued on the exchange designated as the primary market by UBS Global Asset Management (Americas) Inc. (“UBS Global AM” or the “Advisor”), the investment advisor of the Fund. UBS Global AM is an indirect wholly owned asset management subsidiary of UBS AG, an internationally diversified organization with headquarters in Zurich and Basel, Switzerland and operations in many areas of the financial services industry. If a market value is not available from an independent pricing source for a particular security, that security is valued at fair value as determined in good faith by or under the direction of the Fund’s Board of Directors (the “Board”). The amortized cost method of valuation, which approximates market value, generally is used to value short-term debt instruments with sixty days or less remaining to maturity, unless the Board determines that this does not represent fair value.
144A   Securities exempt from registration under Rule 144A of the Securities Act of 1933. These securities are considered liquid and may be resold in transactions exempt from registration, normally to qualified institutional buyers. At December 31, 2006, the value of these securities amounted to $6,800,163 or 4.90% of net assets.
REIT   Real Estate Investment Trust.
REMIC   Real Estate Mortgage Investment Conduit.
Strips   Bonds that can be subdivided into a series of zero-coupon bonds.
TIPS   Treasury Inflation Protected Security. Inflation protected securities are debt securities whose principal and/or interest payments are adjusted for inflation, unlike debt securities that make fixed principal and interest payments. Inflation-protected securities include Treasury Inflation Protected Securities (“TIPS”), which are securities issued by the US Treasury. The interest rate paid by the TIPS is fixed, while the principal value rises or falls based on changes in a published Consumer Price Index (“CPI”). Thus, if inflation occurs, the principal and interest payments on the TIPS are adjusted accordingly to protect investors from inflationary loss. During a deflationary period, the principal and interest payments decrease, although the TIPS’ principal amounts will not drop below their face amounts at maturity. In exchange for the inflation protection, the TIPS generally pay lower interest rates than typical US Treasury securities. Only if inflation occurs will TIPS offer a higher real yield than a conventional Treasury bond of the same maturity.


1)    Transactions with affiliates
The Fund invests in shares of UBS Supplementary Trust — U.S. Cash Management Prime Fund (“Supplementary Trust”). The Supplementary Trust is managed by UBS Global Asset Management (Americas), Inc. (the “Advisor”) and is offered as a cash management option only as a business trust to mutual funds and other accounts managed by the Advisor. Distributions from Supplementary Trust are reflected as affiliated interest income. Amounts relating to those investments at December 31, 2006 and for the period ended are summarized as follows:
                            % of
                            net
Fund     Purchases   Sales proceeds   Interest   Value   assets

UBS Supplementary Trust — U.S. Cash Management Prime Fund     $5,088,107     $7,889,359     $468     $3,199,150   2.31 %

For more information regarding the Fund’s other significant policies, please refer to the Fund’s Annual report dated September 30, 2006.



Industry diversification (unaudited)      
As a percentage of net assets      
As of December 31, 2006      
       

Bonds      
US bonds      
US corporate bonds      
Aerospace & defense   0.71 %
Auto components   0.49  
Automobiles   0.73  
Beverages   0.26  
Capital markets   3.18  
Chemicals   0.61  
Commercial banks   5.49  
Commercial services & supplies   0.21  
Construction materials   0.51  
Consumer finance   8.28  
Diversified financial services   6.26  
Diversified telecommunication services   5.39  
Electric utilities   1.25  
Energy equipment & services   0.22  
Food & staples retailing   1.03  
Food products   0.55  
Health care providers & services   0.75  
Household durables   0.75  
Insurance   0.63  
Media   2.12  
Multiline retail   0.25  
Multi-utilities & unregulated power   2.48  
Oil & gas   3.34  
Paper & forest products   0.50  
Pharmaceuticals   3.54  
Real estate   1.14  
Road & rail   2.06  
Thrifts & mortgage finance   2.38  
Wireless telecommunication services   0.89  
   
 
Total US corporate bonds   56.00  
   
 
Asset-backed securities   3.57  
Mortgage & agency debt securities   10.11  
Municipal notes and bonds   3.61  
US government obligations   17.07  
   
 
Total US bonds   90.36  
   
 
International bonds      
International corporate bonds      
Aerospace & defense   0.72  
Beverages   0.49  
Commercial banks   0.68  
Diversified financial services   1.78  
Diversified telecommunication services   1.04  
Energy equipment & services   0.72  
Oil & gas   0.25  
Road & rail   0.23  
   
 
Total international corporate bonds   5.91  
Sovereign/supranational bond   0.35  
   
 
Total international bonds   6.26  
   
 
Total bonds   96.62  
Short-term investment   2.31  
   
 
Total investments   98.93  
Cash and other assets, less liabilities   1.07  
   
 
Net assets   100.00 %
   
 

Item 2. Controls and Procedures.

  (a)  
The registrant’s principal executive officer and principal financial officer have concluded that the registrant’s disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940, as amended (“Investment Company Act”)) are effective based on their evaluation of these controls and procedures as of a date within 90 days of the filing date of this document.
       
  (b)  
The registrant’s principal executive officer and principal financial officer are aware of no changes in the registrant’s internal control over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act) that occurred during the registrant’s last fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting.

Item 3. Exhibits.

  (a)  
Certifications of principal executive officer and principal financial officer of registrant pursuant to Rule 30a-2(a) under the Investment Company Act is attached hereto as Exhibit EX-99.CERT.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Fort Dearborn Income Securities, Inc.

By:   /s/ Kai R. Sotorp
    Kai R. Sotorp
    President
     
Date:   March 1, 2007

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

By:   /s/ Kai R. Sotorp
    Kai R. Sotorp
    President
     
Date:   March 1, 2007
     
By:   /s/ Thomas Disbrow
    Thomas Disbrow
    Treasurer & Principal Accounting Officer
     
Date:   March 1, 2007