Form N-Q

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549

FORM N-Q


QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT INVESTMENT COMPANY

Investment Company Act file number         811-05488         

        Nuveen Municipal Income Fund, Inc.         
(Exact name of registrant as specified in charter)


        333 West Wacker Drive, Chicago, Illinois 60606         
(Address of principal executive offices) (Zip code)


Jessica R. Droeger—Vice President and Secretary
        333 West Wacker Drive, Chicago, Illinois 60606         
(Name and address of agent for service)

Registrant's telephone number, including area code:         312-917-7700        

Date of fiscal year end:            10/31          

Date of reporting period:          07/31/05         

Form N-Q is to be used by management investment companies, other than small business investment companies registered on Form N-5 (§§ 239.24 and 274.5 of this chapter), to file reports with the Commission, not later than 60 days after the close of the first and third fiscal quarters, pursuant to rule 30b1-5 under the Investment Company Act of 1940 (17 CFR 270.30b1-5). The Commission may use the information provided on Form N-Q in its regulatory, disclosure review, inspection, and policymaking roles.

A registrant is required to disclose the information specified by Form N-Q, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in Form N-Q unless the Form displays a currently valid Office of Management and Budget (“OMB”) control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to the Secretary, Securities and Exchange Commission, 450 Fifth Street, NW, Washington, DC 20549-0609. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. § 3507.

Item 1. Schedule of Investments

                               Portfolio of Investments (Unaudited)              
                                     Nuveen Municipal Income Fund, Inc. (NMI)              
                               July 31, 2005              
 
 
 
  Principal      Optional Call          Market 
  Amount (000)    Description    Provisions*    Ratings**      Value 
      Alabama - 0.8%              
$   690    Phenix City Industrial Development Board, Alabama, Environmental Improvement Revenue Bonds,   5/12 at 100.00    BBB    $   748,284 
      MeadWestvaco Corporation, Series 2002A, 6.350%, 5/15/35 (Alternative Minimum Tax)              
      California - 18.3%              
  5,530    Adelanto School District, San Bernardino County, California, General Obligation Bonds, Series   No Opt. Call    AAA      2,533,680 
      1997A, 0.000%, 9/01/22 - MBIA Insured              
      Brea Olinda Unified School District, California, General Obligation Bonds, Series 1999A:              
  2,000    0.000%, 8/01/21 - FGIC Insured   No Opt. Call    AAA      973,420 
  2,070    0.000%, 8/01/22 - FGIC Insured   No Opt. Call    AAA      952,014 
  2,120    0.000%, 8/01/23 - FGIC Insured   No Opt. Call    AAA      923,324 
  500    California, General Obligation Bonds, Series 2004, 5.200%, 4/01/26   4/14 at 100.00    A      534,085 
  3,000    California State Public Works Board, Lease Revenue Bonds, Department of Mental Health, Coalinga   6/14 at 100.00    A-      3,163,050 
      State Hospital, Series 2004A, 5.000%, 6/01/25              
  1,000    California Statewide Community Development Authority, Revenue Bonds, Daughters of Charity Health   7/15 at 100.00    BBB+      1,027,850 
      System, Series 2005A, 5.000%, 7/01/39              
  1,150    Foothill/Eastern Transportation Corridor Agency, California, Toll Road Revenue Bonds, Series 1995A,   1/07 at 100.00    AAA      1,202,658 
      6.000%, 1/01/34 (Pre-refunded to 1/01/07)              
  3,000    Golden State Tobacco Securitization Corporation, California, Tobacco Settlement Asset-Backed Bonds,   6/13 at 100.00    BBB      3,455,400 
      Series 2003A-1, 6.750%, 6/01/39              
  500    Lake Elsinore Public Financing Authority, California, Local Agency Revenue Refunding Bonds, Series   10/13 at 102.00    N/R      531,620 
      2003H, 6.375%, 10/01/33              
  1,000    Vernon, California, Electric System Revenue Bonds, Malburg Generating Station Project, Series   4/08 at 100.00    Aaa      1,065,680 
      2003C, 5.375%, 4/01/18 (Pre-refunded to 4/01/08)              
      Colorado - 5.3%              
  495    Colorado Educational and Cultural Facilities Authority, Charter School Revenue Bonds, Peak-to-Peak   8/11 at 100.00    AAA      595,886 
      Charter School, Series 2001, 7.500%, 8/15/21 (Pre-refunded to 8/15/11)              
  1,000    Colorado Educational and Cultural Facilities Authority, Charter School Revenue Bonds, Weld County   6/11 at 100.00    Ba1      1,036,920 
      School District 6 - Frontier Academy, Series 2001, 7.375%, 6/01/31              
  870    Colorado Educational and Cultural Facilities Authority, Charter School Revenue Bonds, Douglas   7/12 at 100.00    BBB      879,326 
      County School District RE-1 - DCS Montessori School, Series 2002A, 6.000%, 7/15/22              
  2,000    Denver City and County, Colorado, Airport System Revenue Refunding Bonds, Series 2000A, 6.000%,   11/10 at 100.00    AAA      2,216,680 
      11/15/16 (Alternative Minimum Tax)- AMBAC Insured              
      Connecticut - 5.7%              
  1,480    Capitol Region Education Council, Connecticut, Revenue Bonds, Series 1995, 6.750%, 10/15/15   10/05 at 102.00    BBB      1,516,216 
  2,000    Connecticut Health and Educational Facilities Authority, Revenue Bonds, University of New Haven,   7/06 at 102.00    BBB-      2,059,680 
      Series 1996D, 6.700%, 7/01/26              
  500    Eastern Connecticut Resource Recovery Authority, Solid Waste Revenue Bonds, Wheelabrator Lisbon   1/06 at 100.00    BBB      505,650 
      Project, Series 1993A, 5.500%, 1/01/14 (Alternative Minimum Tax)              
    955    Williamantic Housing Authority, Connecticut, GNMA Collateralized Multifamily Housing Mortgage    10/05 at 105.00    AAA        1,006,322 
      Revenue Bonds, Village Heights Apartments, Series 1995A, 8.000%, 10/20/30               
      Florida - 2.3%               
  175    Dade County Industrial Development Authority, Florida, Revenue Bonds, Miami Cerebral Palsy    12/05 at 102.00    N/R      178,834 
      Residential Services Inc., Series 1995 8.000%, 6/01/22               
  1,250    Martin County Industrial Development Authority, Florida, Industrial Development Revenue Bonds,    12/05 at 101.00    BB+      1,270,875 
      Indiantown Cogeneration LP, Series 1994A, 7.875%, 12/15/25 (Alternative Minimum Tax)               
  600    Martin County Industrial Development Authority, Florida, Industrial Development Revenue Refunding    12/05 at 101.00    BB+      610,026 
      Bonds, Indiantown Cogeneration LP, Series 1995B, 8.050%, 12/15/25 (Alternative Minimum Tax)               
      Illinois - 6.7%               
  1,485    Chicago, Illinois, Tax Increment Allocation Bonds, Irving/Cicero Redevelopment Project, Series    1/09 at 100.00    N/R      1,517,135 
      1998, 7.000%, 1/01/14               
      Illinois Development Finance Authority, Revenue Bonds, Chicago Charter School Foundation, Series               
      2002A:               
  500    6.125%, 12/01/22    12/12 at 100.00    BBB      533,055 
  1,000    6.250%, 12/01/32    12/21 at 100.00    BBB      1,038,890 
  1,000    Illinois Educational Facilities Authority, Student Housing Revenue Bonds, Educational Advancement    5/12 at 101.00    Baa2      1,030,080 
      Foundation Fund, University Center Project, Series 2002, 6.250%, 5/01/34               
  1,765    Joliet Regional Port District, Illinois, Airport Facilities Revenue Bonds, Lewis University    7/07 at 103.00    N/R      1,853,056 
      Airport, Series 1997A, 7.250%, 7/01/18 (Alternative Minimum Tax)               
      Indiana - 4.1%               
  2,000    Indiana Health Facility Financing Authority, Hospital Revenue Bonds, Riverview Hospital, Series    8/12 at 101.00    Baa1      2,156,680 
      2002, 6.125%, 8/01/31               
  1,350    Whitley County, Indiana, Solid Waste and Sewerage Disposal Revenue Bonds, Steel Dynamics Inc.,    11/10 at 102.00    N/R      1,473,863 
      Series 1998, 7.250%, 11/01/18 (Alternative Minimum Tax)               
      Louisiana - 2.7%               
  1,880    Louisiana Public Facilities Authority, Extended Care Facilities Revenue Bonds, Comm-Care    No Opt. Call    BBB      2,399,839 
      Corporation Project, Series 1994, 11.000%, 2/01/14               
      Maryland - 1.1%               
  1,000    Maryland Energy Financing Administration, Revenue Bonds, AES Warrior Run Project, Series 1995,    9/05 at 102.00    N/R      1,020,680 
      7.400%, 9/01/19 (Alternative Minimum Tax)               
      Massachusetts - 2.9%               
  500    Massachusetts Development Finance Agency, Resource Recovery Revenue Bonds, Ogden Haverhill    12/09 at 102.00    BBB      542,860 
      Associates, Series 1999A, 6.700%, 12/01/14 (Alternative Minimum Tax)               
  1,000    Massachusetts Industrial Finance Agency, Resource Recovery Remarketed Revenue Refunding Bonds,    No Opt. Call    BBB      1,003,960 
      Ogden Haverhill Project, Series 1992A, 4.850%, 12/01/05               
  270    Massachusetts Industrial Finance Agency, Resource Recovery Revenue Refunding Bonds, Ogden Haverhill    12/08 at 102.00    BBB      276,882 
      Project, Series 1998A, 5.450%, 12/01/12 (Alternative Minimum Tax)               
  625    Shelby County Health, Educational and Housing Facilities Board, Tennessee, Hospital Revenue Bonds,    9/12 at 100.00    A-***      738,688 
      Methodist Healthcare, Series 2002, 6.500%, 9/01/26 (Pre-refunded to 9/01/12)               
      Michigan - 4.2%               
  1,000    Delta County Economic Development Corporation, Michigan, Environmental Improvement Revenue    4/12 at 100.00    AAA      1,141,810 
      Refunding Bonds, MeadWestvaco Corporation - Escanaba Paper Company, Series 2002B, 6.450%, 4/15/23               
      (Alternative Minimum Tax) (Pre-refunded to 4/15/12)               
  2,150    Michigan State Hospital Finance Authority, Hospital Revenue Refunding Bonds, Sinai Hospital, Series    1/06 at 102.00    Ba3      2,172,511 
      1995, 6.625%, 1/01/16               
    500    Wayne County, Michigan, Special Airport Facilities Revenue Refunding Bonds, Northwest Airlines    12/05 at 102.00    N/R        392,595 
      Inc., Series 1995, 6.750%, 12/01/15               
      Minnesota - 1.0%               
  880    St. Paul Housing and Redevelopment Authority, Minnesota, Hospital Facility Revenue Refunding Bonds,    11/05 at 100.00    BB+      882,895 
      HealthEast Inc., Series 1993A, 6.625%, 11/01/17               
      Montana - 1.4%               
  1,200    Montana Board of Investments, Exempt Facility Revenue Bonds, Stillwater Mining Company Project,    7/10 at 101.00    B1      1,257,696 
      Series 2000, 8.000%, 7/01/20 (Alternative Minimum Tax)               
      Nebraska - 1.2%               
  1,000    Washington County, Nebraska, Wastewater Facilities Revenue Bonds, Cargill Inc., Series 2002,    11/12 at 101.00    A+      1,095,020 
      5.900%, 11/01/27 (Alternative Minimum Tax)               
      New Hampshire - 0.8%               
      New Hampshire Higher Educational and Health Facilities Authority, Revenue Bonds, New Hampshire               
      College, Series 1997:               
  100    6.375%, 1/01/27 (Pre-refunded to 1/01/07)    1/07 at 102.00    BBB-***      106,615 
  200    6.375%, 1/01/27 (Pre-refunded to 1/01/07)    1/07 at 102.00    BBB-***      213,580 
  400    6.375%, 1/01/27    1/07 at 102.00    BBB-      414,256 
      New York - 6.4%               
  1,000    Dormitory Authority of the State of New York, Revenue Bonds, Brooklyn Law School, Series 2003A,    7/13 at 100.00    AA      1,104,880 
      5.500%, 7/01/15 - RAAI Insured               
  4,190    Yates County Industrial Development Agency, New York, FHA-Insured Civic Facility Mortgage Revenue    2/11 at 101.00    AA+      4,555,075 
      Bonds, Soldiers and Sailors Memorial Hospital, Series 2000A, 6.000%, 2/01/41               
      Ohio - 3.3%               
  400    Ohio Water Development Authority, Solid Waste Disposal Revenue Bonds, BHP Steel LLC, Series 1995,    9/05 at 102.00    A+      408,740 
      6.300%, 9/01/20 (Alternative Minimum Tax)               
  2,400    Ohio Water Development Authority, Solid Waste Disposal Revenue Bonds, Bay Shore Power, Series    9/09 at 102.00    N/R      2,496,816 
      1998B, 6.625%, 9/01/20 (Alternative Minimum Tax)               
      Pennsylvania - 4.0%               
  1,080    Allegheny County Hospital Development Authority, Pennsylvania, Revenue Bonds, West Penn Allegheny    11/10 at 102.00    B1      1,298,106 
      Health System, Series 2000B, 9.250%, 11/15/30               
  1,165    Carbon County Industrial Development Authority, Pennsylvania, Resource Recovery Revenue Refunding    No Opt. Call    BBB-      1,265,248 
      Bonds, Panther Creek Partners Project, Series 2000, 6.650%, 5/01/10 (Alternative Minimum Tax)               
  1,000    Pennsylvania Convention Center Authority, Revenue Refunding Bonds, Series 1994A, 6.750%, 9/01/19    9/05 at 101.00    BBB      1,022,590 
      Rhode Island - 0.6%               
  500    Rhode Island Tobacco Settlement Financing Corporation, Tobacco Settlement Asset-Backed Bonds,    6/12 at 100.00    BBB      540,290 
      Series 2002A, 6.250%, 6/01/42               
      South Carolina - 5.0%               
  2,500    Greenville County School District, South Carolina, Installment Purchase Revenue Bonds, Series 2002,    12/12 at 101.00    AA-      2,777,750 
      5.500%, 12/01/13               
  475    Piedmont Municipal Power Agency, South Carolina, Electric Revenue Bonds, Series 1991, 6.750%,    No Opt. Call    AAA      613,952 
      1/01/19 - FGIC Insured               
  1,000    Tobacco Settlement Revenue Management Authority, South Carolina, Tobacco Settlement Asset-Backed    5/11 at 101.00    BBB      1,066,280 
      Bonds, Series 2001B, 6.000%, 5/15/22               
      Tennessee - 1.7%               
    1,000    Knox County Health, Educational and Housing Facilities Board, Tennessee, Hospital Revenue Bonds,    4/12 at 101.00    Baa3        1,064,300 
      Baptist Health System of East Tennessee Inc., Series 2002, 6.375%, 4/15/22               
  375    Shelby County Health, Educational and Housing Facilities Board, Tennessee, Hospital Revenue Bonds,    9/12 at 100.00    A-***      443,524 
      Methodist Healthcare, Series 2002, 6.500%, 9/01/26               
      Texas - 7.5%               
  2,000    Gulf Coast Waste Disposal Authority, Texas, Sewerage and Solid Waste Disposal Revenue Bonds,    4/12 at 100.00    A+      2,147,540 
      Anheuser Busch Company, Series 2002, 5.900%, 4/01/36 (Alternative Minimum Tax)               
  2,000    Matagorda County Navigation District 1, Texas, Collateralized Revenue Refunding Bonds, Houston    10/13 at 101.00    AAA      1,995,420 
      Light and Power Company, Series 1995, 4.000%, 10/15/15 - MBIA Insured               
  2,000    Weslaco Health Facilities Development Corporation, Texas, Hospital Revenue Bonds, Knapp Medical    6/12 at 100.00    BBB+      2,167,340 
      Center, Series 2002, 6.250%, 6/01/25               
  1,000    West Texas Independent School District, McLennan and Hill Counties, General Obligation Refunding    8/13 at 51.84    AAA      349,840 
      Bonds, Series 1998, 0.000%, 8/15/25               
      Virgin Islands - 3.1%               
  2,545    Virgin Islands Public Finance Authority, Senior Lien Matching Fund Loan Note, Series 2004A,    10/14 at 100.00    BBB      2,737,504 
      5.250%, 10/01/19               
      Virginia - 3.1%               
  1,000    Chesterfield County Industrial Development Authority, Virginia, Pollution Control Revenue Bonds,    11/10 at 102.00    A3      1,094,560 
      Virginia Electric and Power Company, Series 1987A, 5.875%, 6/01/17               
  1,500    Mecklenburg County Industrial Development Authority, Virginia, Revenue Bonds, UAE Mecklenburg    10/12 at 100.00    A3      1,695,180 
      Cogeneration LP, Series 2002, 6.500%, 10/15/17 (Alternative Minimum Tax)               
      West Virginia - 2.4%               
  2,050    Mason County, West Virginia, Pollution Control Revenue Bonds, Appalachian Power Company, Series    10/11 at 100.00    BBB      2,099,875 
      2003L, 5.500%, 10/01/22               
      Wisconsin - 1.2%               
  1,000    Wisconsin Health and Educational Facilities Authority, Revenue Bonds, Carroll College Inc., Series    10/11 at 100.00    BBB      1,074,650 
      2001, 6.250%, 10/01/21               
$   87,870    Total Long-Term Investments (cost $79,936,539) - 96.8%              86,269,586 
      Other Assets Less Liabilities - 3.2%              2,842,603 
      Net Assets - 100%            $   89,112,189 

*      Optional Call Provisions: Dates (month and year) and prices of the earliest optional call or redemption. There may be other call provisions at varying prices at later dates.
**      Ratings: Using the higher of Standard & Poor's or Moody's rating.
***      Securities are backed by an escrow or trust containing sufficient U.S. Government or U.S. Government agency securities which ensures the timely payment of principal and interest. Such securities are normally considered to be equivalent to AAA rated securities.

N/R Investment is not rated.

Income Tax Information       
 
The following information is presented on an income tax basis. Differences between amounts for financial statement       
and federal income tax purposes are primarily due to timing differences in recognizing income on taxable market       
discount securities and timing differences in recognizing certain gains and losses on investment transactions.       
 
At July 31, 2005, the cost of investments was $79,834,544.       
 
Gross unrealized appreciation and gross unrealized depreciation of investments at July 31, 2005, were as       
follows:       
 
Gross unrealized:       
     Appreciation    $   6,544,014  
     Depreciation      (108,972 ) 
 
Net unrealized appreciation of investments    $   6,435,042  

Item 2. Controls and Procedures.

  1. The registrant's principal executive and principal financial officers, or persons performing similar functions, 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 (the "1940 Act") (17 CFR 270.30a-3(c))) are effective, as of a date within 90 days of the filing date of this report that includes the disclosure required by this paragraph, based on their evaluation of the controls and procedures required by Rule 30a-3(b) under the 1940 Act (17 CFR 270.30a-3(b)) and Rule 13a-15(b) or 15d-15(b) under the Securities Exchange Act of 1934 (17 CFR 240.13a-15(b) or 240.15d-15(b)).
  2. There were no changes in the registrant's internal control over financial reporting (as defined in Rule 30a-3(d) under the 1940 Act (17 CFR 270.30a-3(d)) that occurred during the registrant's last fiscal quarter that have materially affected, or are reasonably likely to materially affect, the registrant's internal control over financial reporting.

Item 3. Exhibits.

File as exhibits as part of this Form a separate certification for each principal executive officer and principal financial officer of the registrant as required by Rule 30a-2(a) under the 1940 Act (17 CFR 270.30a-2(a)), exactly as set forth below: EX-99 CERT Attached hereto.


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.

(Registrant)         Nuveen Municipal Income Fund, Inc.        

By (Signature and Title)*          /s/ Jessica R. Droeger--Vice President and Secretary        

Date         09/29/05        

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 (Signature and Title)*         /s/ Gifford R. Zimmerman--Chief Administrative Officer (principal executive officer)        

Date         09/29/05        

By (Signature and Title)*         /s/ Stephen D. Foy--Vice President and Controller (principal financial officer)        

Date         09/29/05        

* Print the name and title of each signing officer under his or her signature.