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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: 811-10377

Registrant Name: PIMCO Municipal Income Fund

Address of Principal Executive Offices: 1345 Avenue of the Americas New York, New York 10105

Name and Address of Agent for Service: Lawrence G. Altadonna – 1345 Avenue of the Americas New York, New York 10105

Registrant’s telephone number, including area code: 212-739-3371

Date of Fiscal Year End: April 30, 2007

Date of Reporting Period: January 31, 2007

Form N-Q is to be used by the registered management investment company, other than a small business investment company 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 30b 1-5 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 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

PIMCO Municipal Income Fund 
Schedule of Investments
January 31, 2007 (unaudited)


Principal
Amount
(000)
      
Credit Rating
(Moody’s/S&P)
Value*

MUNICIPAL BONDS & NOTES–93.0%

 

Alabama–1.9%

   
$  2,500 Birmingham Baptist Medical Centers Special Care Facs. Financing Auth. Rev., 5.875%, 11/15/24, Ser. A Baa1/NR $    2,642,025
8,000 Huntsville Health Care Auth. Rev., 5.75%, 6/1/31, Ser. A A2/NR 8,454,240
      11,096,265
 

Alaska–1.1%

   
6,000 Northern Tobacco Securitization Corp. Rev., 5.50%, 6/1/29, (Pre-refunded @ $100, 6/1/11) (a) Aaa/AAA 6,392,820
 

Arizona–0.9%

   
2,000 Apache Cnty. Industrial Dev. Auth. Rev., Pollution Control Rev., Tucson Electric Power Co., 5.875%, 3/1/33, Ser. B Baa3/B+ 2,001,940
3,500 Salt River Project Agricultural Improvement & Power Dist. Rev.,
4.75%, 1/1/35, Ser. A
Aa1/AA 3,594,500
      5,596,440
 

Arkansas–0.4%

   
8,500 Arkansas Dev. Finance Auth. Rev., zero coupon, 7/1/36 (AMBAC) Aaa/AAA 2,137,495
 

California–3.6%

   
10,000 Golden State Tobacco Securitization Corp., Tobacco Settlement Rev., 6.75%, 6/1/39, Ser. 2003-A-1 Baa3/BBB 11,438,000
10,000 Riverside Cnty. Public Financing Auth., Tax Allocation, 4.50%, 10/1/30, Ser. A (XLCA) Aaa/AAA 9,985,000
      21,423,000
 

Colorado–2.4%

   
  Denver Health & Hospital Auth. Healthcare Rev., Ser. A,    
2,000 5.375%, 12/1/28 Baa3/BBB 2,020,420
1,000 6.00%, 12/1/23 Baa3/BBB 1,062,970
12,400 Health Facs. Auth. Retirement Facs. Rev., zero coupon, 7/15/24 NR/AAA 5,715,036
4,965 Northwest Parkway Public Highway Auth. Rev., 7.125%, 6/15/41, Ser. D B3/CCC 5,354,206
      14,152,632
 

Connecticut–0.2%

   
1,000 State Dev. Auth. Pollution Control Rev., 5.85%, 9/1/28 Baa1/BBB− 1,047,200
 

District of Columbia–1.0%

   
5,325 Tobacco Settlement Financing Corp. Rev., 6.25%, 5/15/24 Baa3/BBB 5,684,704
 

Florida–1.7%

   
9,000 Highlands Cnty. Health Facs. Auth. Rev., Adventist Health System, 6.00%, 11/15/31, Ser. A, (Pre-refunded @ $101, 11/15/11) (a) A2/NR 9,928,080
 

Georgia–1.9%

   
  Municipal Electric Auth. Power Rev. (MBIA-IBC),    
9,700 5.50%, 1/1/20 Aaa/AAA 10,647,399
300 5.50%, 1/1/20, Ser. Z Aaa/AAA 331,104
      10,978,503



PIMCO Municipal Income Fund 
Schedule of Investments
January 31, 2007 (unaudited) (continued)


Principal
Amount
(000)
      
Credit Rating
(Moody’s/S&P)
Value*
 

Illinois–12.7%

   
  Chicago, GO, Ser. A (FGIC),    
$  2,935 5.375%, 1/1/34 Aaa/AAA $3,030,505
6,145 5.375%, 1/1/34, (Pre-refunded @ $101, 1/1/09) (a) Aaa/AAA 6,385,146
10,115 Chicago Board of Education, GO, zero coupon, 12/1/31,
Ser. A (FGIC)
Aaa/AAA 3,247,421
2,000 Chicago Water Rev., 5.25%, 11/1/27, (Pre-refunded @ $102, 11/1/07) (FGIC) (a) Aaa/AAA 2,063,000
  Educational Facs. Auth. Rev.,    
1,115 Midwestern Univ., 5.50%, 5/15/18, Ser. B NR/A− 1,142,507
  Univ. of Chicago,    
5,000 5.125, 7/1/38, Ser. A (k) NR/NR 5,106,743
190 5.25%, 7/1/41 Aa1/AA 200,150
4,810 5.25%, 7/1/41, (Pre-refunded @ $101, 7/1/11) (a) Aa1/AA 5,123,155
  Finance Auth. Rev.,    
3,000 5.00%, 12/1/36 (c) NR/BBB 3,047,505
5,000 5.50%, 11/15/29, (Pre-refunded @ $101, 11/15/09) (a) A2/A+ 5,254,600
1,260 5.65%, 11/15/24, (Pre-refunded @ $101, 11/15/09) (a) A2/A+ 1,329,098
  Health Facs. Auth. Rev.,    
3,000 Decatur Memorial Hospital, 5.75%, 10/1/24 A2/A 3,175,080
5,425 Silver Cross Hospital, 5.50%, 8/15/25, (Pre-refunded @ $101, 8/15/09) (a) NR/A 5,695,870
  Lake Cnty. Community High School Dist., GO, Ser. B (FGIC),    
5,000 zero coupon, 2/1/19 Aaa/AAA 2,974,250
5,000 zero coupon, 2/1/20 Aaa/AAA 2,837,300
5,690 zero coupon, 2/1/22 Aaa/AAA 2,941,787
7,345 Regional Transportation Auth. Rev., 5.50%, 6/1/23, Ser. B (FGIC) Aaa/AAA 8,511,753
3,000 State Sales Tax Rev., 5.125%, 6/15/20, Ser. 1 Aa3/AAA 3,150,840
  Univ. Rev. (FGIC),    
1,495 5.25%, 4/1/32 Aaa/AAA 1,559,988
3,505 5.25%, 4/1/32, (Pre-refunded @ $100, 4/1/11) (a) Aaa/AAA 3,699,878
4,000 Winnebago-Boone ETC Cntys. Rock Valley Community College, Dist. No. 511, GO, 5.30%, 10/1/18, (Partially pre-refunded @ $100, 10/1/10) (FGIC) (a) Aaa/NR 4,173,600
      74,650,176
 

Indiana–1.7%

   
6,500 Carmel School Building Corp. Rev., 5.00%, 7/15/22, (Pre-refunded @ $101, 7/15/11) (MBIA) (a) Aaa/AAA 6,773,065
1,225 Richland-Bean Blossom School Building Corp. Rev., 5.00%, 1/15/22 (FGIC) Aaa/AAA 1,267,838
1,825 Zionsville Community Schools Building Corp. Rev., 5.00%, 7/15/27, Ser. A (FSA) NR/AAA 1,910,666
      9,951,569
 

Kansas–3.5%

   
  Wichita Hospital Rev.,    
5,000 5.625%, 11/15/31, Ser. III NR/A+ 5,306,050
14,370 6.25%, 11/15/24, Ser. XI NR/A+ 15,328,048
      20,634,098



PIMCO Municipal Income Fund 
Schedule of Investments
January 31, 2007 (unaudited) (continued)


Principal
Amount
(000)
      
Credit Rating
(Moody’s/S&P)
Value*
 

Kentucky–0.2%

   
$     910 Economic Dev. Finance Auth. Hospital Facs. Rev., St. Luke’s Hospital, 6.00%, 10/1/19 A3/A $1,006,605
 

Louisiana–5.9%

   
4,300 Local Gov’t Environmental Facs. & Community Dev. Auth. Rev., 6.55%, 9/1/25 (ACA) NR/A 4,864,203
27,895 Tobacco Settlement Financing Corp. Rev., 5.875%, 5/15/39, Ser. 2001-B Baa3/BBB 29,950,025
      34,814,228
 

Maryland–0.2%

   
1,150 Baltimore Water Project Rev., 5.125%, 7/1/42, Ser. A (FGIC) Aaa/AAA 1,200,358
 

Massachusetts–1.8%

   
10,000 State Health & Educational Facs. Auth. Rev., Partners Healthcare System, 5.75%, 7/1/32, Ser. C (k) Aa2/AA 10,725,400
 

Michigan–4.4%

   
  Detroit, GO, Ser. A-1 (MBIA),    
1,000 5.375%, 4/1/15 Aaa/AAA 1,060,880
1,000 5.375%, 4/1/17 Aaa/AAA 1,058,700
5,650 Forest Hills Public Schools, GO, 5.25%, 5/1/18, (Pre-refunded @ $100, 5/1/10) (a) Aa2/NR 5,891,876
3,000 Mount Clemens Community School Dist., GO, 5.00%, 5/1/31 Aa2/AA 3,103,260
50 Royal Oak Hospital Finance Auth. Rev., William Beaumont Hospital, 5.25%, 11/15/35, Ser. M (MBIA) Aaa/AAA 51,897
4,000 State Hospital Finance Auth. Rev., Detroit Medical Center, 6.25%, 8/15/13 Ba3/BB− 4,019,040
2,000 State Strategic Fund Ltd. Obligation Rev., Detroit Edison Pollution Control Co., 5.45%, 9/1/29 A3/BBB+ 2,107,200
3,000 Taylor Tax Increment Finance Auth., 5.375%, 5/1/17 (FSA) Aaa/AAA 3,173,550
6,255 Wayne Charter Cnty. Airport Fac. Rev., 6.75%, 12/1/15 (d) NR/NR 5,535,863
      26,002,266
 

Minnesota–0.6%

   
  Agricultural & Economic Dev. Board Rev., Health Care System,    
95 6.375%, 11/15/29 A2/A 104,527
2,905 6.375%, 11/15/29, (Pre-refunded @ $101, 11/15/10) (a) A2/A 3,190,939
      3,295,466
 

Missouri–0.4%

   
2,500 Interstate 470 & 350 Transportation Dev. Dist. Rev., 6.35%, 5/1/22 NR/NR 2,532,925
 

Nevada–3.5%

   
3,000 Clark Cnty. Rev., 5.25%, 7/1/34, Ser. B, (Pre-refunded @ $100, 7/1/11) (FGIC) (a) Aaa/AAA 3,176,070
4,250 Truckee Meadows Water Auth. Rev., 5.25%, 7/1/34, Ser. A, (Pre-refunded @ $100, 7/1/11) (FSA) (a) Aaa/AAA 4,499,432
12,185 Washoe County, Water & Sewer, GO, 5.00%, 1/1/35 (MBIA) (k) Aaa/AAA 12,828,490
      20,503,992



PIMCO Municipal Income Fund 
Schedule of Investments
January 31, 2007 (unaudited) (continued)


Principal
Amount
(000)
      
Credit Rating
(Moody’s/S&P)
Value*
 

New Hampshire–0.5%

   
$  3,000 State Business Finance Auth. Pollution Control Rev., Conn. Light & Power Co., 5.85%, 12/1/22 Baa1/BBB− $3,143,580
 

New Jersey–3.8%

   
  Camden Cnty. Improvement Auth. Rev., Cooper Health System,    
240 5.60%, 2/15/07 Baa3/BBB 239,998
875 6.00%, 2/15/27, (Pre-refunded @ $102, 2/15/07) (a) Baa3/BBB 893,025
16,550 Economic Dev. Auth., Kapkowski Road Landfill Project, Special Assessment, 5.75%, 4/1/31 Baa3/NR 18,183,816
  Economic Dev. Auth. Rev., Arbor Glen,    
2,510 5.875%, 5/15/16 NR/NR 2,588,563
450 5.875%, 5/15/16, Ser. A, (Pre-refunded @ $102, 5/15/09) (a) NR/NR 478,318
      22,383,720
 

New Mexico–0.4%

   
2,500 Farmington Pollution Control Rev., 5.80%, 4/1/22 Baa2/BBB 2,517,475
 

New York–2.2%

   
5,000 Liberty Dev. Corp. Rev., Goldman Sachs Headquarters, 5.25%, 10/1/35 Aa3/AA− 5,732,750
  New York City Municipal Water Finance Auth., Water & Sewer System Rev.,    
1,120 5.00%, 6/15/37, Ser. D (k) NR/NR 1,174,510
3,000 5.00%, 6/15/39, Ser. A Aa2/AA+ 3,127,320
2,875 Westchester Cnty. Healthcare Corp. Rev., 5.875%, 11/1/25, Ser. A Ba2/BB 2,992,358
      13,026,938
 

North Carolina–0.5%

   
  Capital Facs. Finance Agcy. Rev., Duke Univ. Project,    
570 5.125%, 10/1/41, Ser. A Aa1/AA+ 591,808
2,430 5.125%, 10/1/41, Ser. A, (Pre-refunded @ $100, 10/1/11) (a) Aaa/AAA 2,570,333
      3,162,141
 

Ohio–1.1%

   
  Lorain Cnty. Hospital Rev., Catholic Healthcare Partners,    
2,500 5.625%, 10/1/17 Aa3/AA− 2,676,250
2,565 5.75%, 10/1/18 Aa3/AA− 2,753,630
1,235 State Turnpike Commission Rev., 5.50%, 2/15/15 Aa3/AA 1,309,866
      6,739,746
 

Pennsylvania–3.9%

   
  Allegheny Cnty.,    
5,780 Hospital Dev. Auth. Rev., 9.25%, 11/15/30, Ser. B Ba3/B+ 6,860,051
1,000 Industrial Dev. Auth. Rev., USX Corp., 5.60%, 9/1/30 Baa1/BBB+ 1,036,620
1,095 Port Auth. Rev., 5.25%, 3/1/20 (FGIC) Aaa/AAA 1,158,641
2,575 Delaware Cnty. Auth. College Rev., Neumann College, 5.80%, 10/1/17 NR/BBB− 2,690,927
6,200 Higher Educational Facs. Auth. Rev., 6.00%, 1/15/31, Ser. A Aa3/A+ 6,736,672
4,610 Philadelphia Hospitals & Higher Education Facs. Hospital Rev., Temple Univ. Hospital, 6.625%, 11/15/23, Ser. A Baa2/BBB 4,647,018
      23,129,929



PIMCO Municipal Income Fund 
Schedule of Investments
January 31, 2007 (unaudited) (continued)


Principal
Amount
(000)
      
Credit Rating
(Moody’s/S&P)
Value*
 

Puerto Rico–2.3%

   
$     850 Commonwealth of Puerto Rico, GO, 5.00%, 7/1/35, Ser. B Baa3/BBB $886,907
1,600 Electric Power Auth., Power Rev., 5.125%, 7/1/29, Ser. NN A3/BBB+ 1,681,392
10,665 Gov’t Dev. Bank for Puerto Rico Rev., 5.00%, 12/1/08, Ser. B Baa3/BBB 10,857,610
      13,425,909
 

Rhode Island–3.3%

   
18,000 Tobacco Settlement Financing Corp. Rev., 6.25%, 6/1/42, Ser. A Baa3/BBB 19,220,220
 

South Carolina–4.6%

   
  Greenwood Cnty. Hospital Rev., Self Memorial Hospital,    
3,500 5.50%, 10/1/21 A2/A 3,685,850
2,000 5.50%, 10/1/26 A2/A 2,103,600
3,000 Jobs Economic Dev. Auth. Hospital Facs. Rev., Georgetown Memorial Hospital, 5.375%, 2/1/30 (Radian) NR/AA 3,136,590
15,600 Tobacco Settlement Rev., Management Auth., 6.375%, 5/15/30, Ser. B Baa3/BBB 18,126,264
      27,052,304
 

Tennessee–0.1%

   
940 Memphis Health Educational & Housing Fac. Rev., Wesley Housing Corp. Project, 6.95%, 1/1/20 (e) NR/NR 898,137
 

Texas–13.0%

   
1,750 Austin Convention Enterprises, Inc., 5.75%, 1/1/32, Ser. B, (Pre-refunded @ $100, 1/1/11) (a) Aaa/NR 1,870,085
4,000 Austin Rev., 5.25%, 5/15/31, Ser. A & B (FSA) Aaa/AAA 4,170,600
2,935 Bell Cnty. Health Fac. Dev. Corp. Rev., 5.25%, 11/15/19 NR/A− 2,986,010
10,000 Coppell Independent School Dist., GO, zero coupon, 8/15/29 (PSF-GTD) Aaa/AAA 3,550,300
  Corpus Christi Refinance & Improvement, GO (FSA),    
1,125 5.375%, 3/1/18 Aaa/AAA 1,188,630
1,740 5.375%, 3/1/18, (Pre-refunded @ $100, 3/1/11) (a) Aaa/AAA 1,843,112
9,000 Cypress-Fairbanks Independent School Dist., GO, 4.80%, 2/15/26,
Ser. B (PSF-GTD)
Aaa/AAA 9,313,020
  Duncanville Independent School Dist., GO, Ser. B (PSF-GTD),    
20 5.25%, 2/15/32 Aaa/AAA 21,063
3,660 5.25%, 2/15/32, (Pre-refunded @ $100, 2/15/12) (a) Aaa/AAA 3,900,755
  Harris Cnty. Health Facs. Dev. Corp. Rev. (a),    
5,000 Christus Health, 5.375%, 7/1/29, Ser. A, (Pre-refunded @ $101, 7/1/09) (MBIA) Aaa/AAA 5,226,050
7,000 Memorial Hermann Healthcare, 6.375%, 6/1/29, (Pre-refunded @ $101, 6/1/11) A2/A+ 7,759,430
8,500 St. Lukes Episcopal Hospital, 5.375%, 2/15/26, Ser. A, (Pre-refunded @ $100, 8/15/11) (a)(k) NR/AAA 9,037,527
2,000 Mansfield Independent School Dist., GO, 5.25%, 2/15/23 (PSF-GTD) Aaa/AAA 2,100,400
4,380 Southlake Park Dev. Corp. Rev., 5.60%, 8/15/31, (Pre-refunded @ $100, 2/15/11) (AMBAC) (a) Aaa/AAA 4,643,282
4,530 State, GO, 5.30%, 8/1/18, Ser. A Aa1/AA 4,774,258
19,990 State Turnpike Auth. Rev., zero coupon, 8/15/25, Ser. A (AMBAC) Aaa/AAA 8,732,831
4,920 Univ. Rev., 5.00%, 7/1/26, Ser. B, (Pre-refunded @ $100, 7/1/14) (a) Aaa/AAA 5,278,127
      76,395,480



PIMCO Municipal Income Fund 
Schedule of Investments
January 31, 2007 (unaudited) (continued)


Principal
Amount
(000)
      
Credit Rating
(Moody’s/S&P)
Value*
 

Utah–1.2%

   
$  7,000 Salt Lake Cnty. Hospital Rev., IHC Health Services, 5.125%, 2/15/33 (AMBAC) Aaa/AAA $7,277,760
 

Washington–2.0%

   
  Cowlitz Cnty. School Dist. No. 458 Kelso, GO, (Pre-refunded @ $100, 12/1/11) (FSA) (a),    
985 5.625%, 12/1/14 Aaa/NR 1,065,277
1,225 5.625%, 12/1/16 Aaa/NR 1,324,838
3,415 Kent, GO, 5.375%, 12/1/20 (MBIA) Aaa/AAA 3,612,797
5,420 King Cnty. School Dist. No. 1 Seattle, GO, 5.25%, 12/1/21, Ser. A (MBIA) Aaa/AAA 5,728,777
      11,731,689
 

Wisconsin–4.1%

   
  Badger Tobacco Asset Securitization Corp. Rev.,    
5,000 5.75%, 6/1/12 Baa3/BBB 5,348,650
9,785 6.00%, 6/1/17 Baa3/BBB 10,486,389
3,515 State, GO, 5.00%, 5/1/22, Ser. A (FGIC) Aaa/AAA 3,681,119
2,230 State Health & Educational Facs. Auth. Rev., Kenosha Hospital & Medical Center, 5.625%, 5/15/29 NR/A 2,289,764
2,250 Wisconsin Health & Educational Facs. Auth., Divine Savior Healthcare Rev., 5.00%, 5/1/32 NR/BBB 2,264,715
      24,070,637
  Total Municipal Bonds & Notes (cost–$510,795,478)   547,929,887

VARIABLE RATE NOTES (g)–3.7%

 

Hawaii–0.3%

   
1,388 City & Cnty. of Honolulu Rev., 9.52%, 7/1/23, Ser. 400 (FGIC) (b)(f) Aaa/NR 1,574,882
 

Illinois–0.6%

   
2,902 Cook Cnty., GO, 9.52%, 11/15/28, Ser. 458 (FGIC) (b)(f) Aaa/NR 3,448,170
 

Nevada–0.0%

   
—† Washoe Cnty., GO, 9.54%, 1/1/35, Ser. 1241 (MBIA) (b)(f) Aaa/AAA 29
 

New York–1.7%

   
  New York City Municipal Water Finance Auth. Rev.,    
2,600 7.130%, 6/15/26 (b)(f) NR/AA+ 3,109,600
6,000 8.688%, 6/15/39 Aa2/AA2 7,133,760
      10,243,360
 

Texas–0.8%

   
  Harris Cnty. Health Facs. Dev. Corp. Rev. (b)(f),    
3,595 11.40%, 7/1/29, Ser. 357 (MBIA) Aaa/NR 4,407,650
 

Washington–0.3%

   
1,800 Seattle, GO, 10.15%, 12/15/28, Ser. 348 (b)(f) Aa1/NR 1,994,040
  Total Variable Rate Notes (cost–$17,863,564)   21,668,131



PIMCO Municipal Income Fund 
Schedule of Investments
January 31, 2007 (unaudited) (continued)


Principal
Amount
(000)
      
Credit Rating
(Moody’s/S&P)
Value*

VARIABLE RATE DEMAND NOTES (g)(h)–3.0%

 

Florida–0.9%

   
$5,300 Jacksonville, Pollution Control Rev., 3.73%, 2/1/07 Aa3/A-1 $5,300,000
 

Illinois–0.2%

   
  1,600 Chicago Board of Education, GO, 3.74%, 2/1/07, Ser. D (FGIC) Aaa/A-1+ 1,600,000
 

Michigan–0.4%

   
1,500 Royal Oak Hospital Finance Auth. Rev., William Beaumont Hospital, 3.75%, 2/1/07 (AMBAC) Aaa/A-1 1,500,000
750 Univ. Rev., 3.75%, 2/1/07, Ser. A Aa2/A-1+ 750,000
      2,250,000
 

New Jersey–0.5%

   
2,900 Rutgers State Univ. Rev., 3.62%, 2/1/07, Ser. A Aa3/A-1+ 2,900,000
 

New York–1.0%

   
  New York City Transitional Finance Auth. Rev.,    
1,100 3.70%, 2/1/07, Ser. B Aa1/A-1+ 1,100,000
4,675 3.70%, 2/1/07, Ser. 3 VMIG1/A-1+ 4,675,000
      5,775,000
  Total Variable Rate Demand Notes (cost–$17,825,000)   17,825,000

U.S. TREASURY BILLS (i)–0.3%

1,560 4.80%-4.90%, 3/1/07-3/15/07 (cost–$1,551,623)   1,551,623

OPTIONS PURCHASED (j)–0.0%

Contracts      
 

Put Options–0.0%

   
  Eurodollar Futures, Chicago Mercantile Exchange,    
125     strike price $92, expires 3/19/07 (cost–$1,188)   781
 

Total Investments before options written (cost–$548,036,853)–100.0%

  588,975,422

OPTIONS WRITTEN (j)–(0.0)%

 

Call Options–(0.0)%

   
240 U.S. Treasury Notes 10 yr. Futures, Chicago Board of Trade,    
      strike price $110, expires 2/23/07 (premiums received–$100,470)   (3,750)
 

Total Investments net of options written (cost–$547,936,383)–100.0%

  $588,971,672



Notes to Schedule of Investments:

Portfolio securities and other financial instruments for which market quotations are readily available are stated at market value. Portfolio securities and other financial instruments for which market quotations are not readily available or if a development/event occurs that may significantly impact the value of a security are fair-valued, in good faith, pursuant to guidelines established by the Board of Trustees. The Fund’s investments are valued daily using prices supplied by an independent pricing service or dealer quotations, or by using the last sale price on the exchange that is the primary market for such securities, or the quoted mean price for those securities for which the over-the-counter market is the primary market or for listed securities in which there were no sales. Independent pricing services use information provided by market makers or estimates of market values obtained from yield data relating to investments or securities with similar characteristics. Exchange traded options and futures are valued at the settlement price determined by the relevant exchange. Securities purchased on a when-issued or delayed-delivery basis are marked to market daily until settlement at the forward settlement value. Short-term securities maturing in 60 days or less are valued at amortized cost, if their original term to maturity was 60 days or less, or by amortizing their value on the 61st day prior to maturity, if the original term to maturity exceeded 60 days. The prices used by the Fund to value securities may differ from the value that would be realized if the securities were sold. The Fund’s net asset value is determined daily as of the close of regular trading (normally, 4:00 p.m. Eastern time) on the New York Stock Exchange (‘‘NYSE’’) on each day the NYSE is open for business.
†  Principal Amount less than $500.
(a)  Pre-refunded bonds are collateralized by U.S. Government or other eligible securities which are held in escrow and used to pay principal and interest and retire the bonds at the earliest refunding date (payment date).
(b)  144A Security – Security exempt from registration, under Rule 144A of the Securities Act of 1933. These securities may be resold in transactions exempt from registration, typically only to qualified institutional buyers. Unless otherwise indicated, these securities are not considered to be illiquid.
(c)  When-issued security. To be settled after January 31, 2007.
(d)  Security in default.
(e)  Fair-valued security.
(f)  Residual Interest Municipal Bonds (‘‘RIBS’’)/Residual Interest Tax Exempt Bonds (‘‘RITES’’) – The interest rate shown bears an inverse relationship to the interest rate on another security or the value of an index.
(g)  Variable Rate Notes – instruments whose interest rates change on specified date (such as a coupon date or interest payment date) and/or whose interest rates vary with changes in a designated base rate (such as the prime interest rate). The interest rate disclosed reflects the rate in effect on January 31, 2007.
(h)  Maturity date shown is date of next put.
(i)  All or partial amount segregated as collateral for futures contracts, options written, or when-issued securities.
(j)  Non-income producing.
(k)  Residual Interest Bonds Held in Trust – Securities represent underlying bonds transferred to a separate securitization trust established in a tender option bond transaction in which the Fund acquired the residual interest certificates. These securities serve as collateral in a financing transaction.



Glossary:

ACA – insured by American Capital Access Holding Ltd.

AMBAC – insured by American Municipal Bond Assurance Corp.

CIFG – insured by CDC IXIS Financial Guaranty Services, Inc.

FGIC – insured by Financial Guaranty Insurance Co.

FSA – insured by Financial Security Assurance, Inc.

GO – General Obligation Bond

GTD – Guaranteed

IBC – Insurance Bond Certificate

MBIA – insured by Municipal Bond Investors Assurance

NR – Not Rated

PSF – Public School Fund

Radian – insured by Radian Guaranty, Inc.

XLCA – insured by XL Capital Assurance

Other Investments:

(1)  Futures contracts outstanding at January 31, 2007:

Type Contracts Market
Value
(000)
Expiration
Date
Unrealized
Appreciation
(Depreciation)
Long: Financial Future Euro – 90 day 176
$ 41,648
6/18/07 $ (155,825
)
  Financial Future Euro – 90 day 176
41,688
9/17/07 (120,800
)
  Financial Future Euro – 90 day 176
41,727
12/17/07 (83,400
)
  Financial Future Euro – 90 day 176
41,752
3/17/08 (54,800
)
Short: U.S. Treasury Bond Futures (296
)
(32,597
)
3/21/07 887,406
  U.S. Treasury Notes 10 yr. Futures (354
)
(37,790
)
3/21/07 757,781
     
 
  $ 1,230,362
(2)  Transactions in options written for the nine months ended January 31, 2007:

  Contracts Premiums
Options outstanding, April 30, 2006 2,141
$ 544,557
Options written 3,022
504,710
Options terminated in closing transactions (1,577
)
(303,015
)
Options expired (3,346
)
(645,782
)
Options outstanding, January 31, 2007 240
$ 100,470



Item 2.    Controls and Procedures

(a) The registrant’s President and Chief Executive Officer and Principal Financial Officer have concluded that the registrant’s disclosure controls and procedures (as defined in Rule 30a-2(c) under the Investment Company Act of 1940, as amended 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.

Prior to reaching this conclusion, the principal officers had become aware of matters relating to the Registrant’s participation in certain inverse floater structures that required enhancements to certain controls. The Registrant’s management determined that controls relating to the review and analysis of relevant terms and conditions of certain transfers of securities under the provisions of Statement of Financial Accounting Standards No. 140 ‘‘Accounting for Transfers and Servicing of Financial Assets and Extinguishments of Liabilities’’ (‘‘SFAS 140’’) were not effective.

The Registrant’s Management is taking such further actions as are necessary to revise its disclosure controls and procedures in order to increase the effectiveness of these controls with respect to the accounting treatment of transfers of certain inverse floater transactions. However, as discussed above, the registrant enhanced controls related to the accounting treatment of transfers of certain inverse floater transactions.

(b) There were no significant changes in the registrant’s internal controls or in factors that could affect these controls subsequent to the date of their evaluation, including any corrective actions with regard to significant deficiencies and material weaknesses.

Item 3.    Exhibits

(a) Exhibit 99.302 Cert. – Certification pursuant to Section 302 of the Sarbanes-Oxley Act of 2002




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: PIMCO Municipal Income Fund
By /s/ Brian S. Shlissel
President & Chief Executive Officer

Date: April 2, 2007

By /s/ Lawrence G. Altadonna
Treasurer, Principal Financial & Accounting Officer

Date: April 2, 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 dated indicated.

By /s/ Brian S. Shlissel
President & Chief Executive Officer

Date: April 2, 2007

By /s/ Lawrence G. Altadonna
Treasurer, Principal Financial & Accounting Officer

Date: April 2, 2007