UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, DC 20549
    
FORM N-Q
      OMB APPROVAL
OMB Number: 3235-0578
Expires: February 28, 2006
Estimated average burden
hours per response: 20.0

QUARTERLY SCHEDULE OF PORTFOLIO HOLDINGS OF REGISTERED MANAGEMENT
INVESTMENT COMPANY

Investment Company Act File Number: 811-21187

Registrant Name: PIMCO MUNICIPAL INCOME FUND III

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: September 30, 2006

Date of Reporting Period: December 31, 2005

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 III 

Schedule of Investments

December 31, 2005 (unaudited)



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

MUNICIPAL BONDS & NOTES–89.8%

 

Alabama–1.4%

  Birmingham, GO, Ser. B (AMBAC),    
$1,000 5.00%, 12/1/27 Aaa/AAA $    1,034,150
2,560 5.00%, 12/1/32 Aaa/AAA 2,638,208
5,000 Birmingham Baptist Medical Center Special Care Facs. Financing Auth. Rev., 5.00%, 11/15/30, Ser. A Baa1/NR 4,874,650
1,500 Colbert Cnty, Northwest Health Care Auth., Health Care Facs. Rev., 5.75%, 6/1/27 Baa3/NR 1,512,825
      10,059,833
 

Alaska–0.7%

  State Housing Finance Corp., Rev.,    
3,900 5.00%, 12/1/33, Ser. A Aaa/AAA 3,968,874
1,000 5.25%, 6/1/32, Ser. C (MBIA) Aaa/AAA 1,012,880
      4,981,754
 

Arizona–0.6%

   
2,200 Health Facs. Auth. John C. Lincoln Health Network Rev.,
7.00%, 12/1/25 (Pre-refunded @ $102, 12/01/10) (a)
NR/BBB 2,573,714
1,500 Maricopa Cnty. Pollution Control Corp., Pollution Control Rev.,
5.05%, 5/1/29 (AMBAC)
Aaa/AAA 1,562,220
      4,135,934
 

California–7.8%

   
1,000 Alameda Public Financing Auth. Rev., 7.00%, 6/1/09 NR/NR 1,006,560
2,000 Chula Vista Community Fac. Dist., Special Tax,
5.25%, 9/1/30
NR/NR 2,012,300
  Golden State Tobacco Securitization Corp., Tobacco Settlement Rev.,
Ser. 2003-A-1,
   
27,585 6.25%, 6/1/33 Baa3/BBB 30,033,720
21,000 6.75%, 6/1/39 Baa3/BBB 23,511,810
      56,564,390
 

Colorado–2.7%

   
  El Paso Cnty., CP (AMBAC),    
1,735 5.00%, 12/1/23, Ser. A Aaa/AAA 1,814,220
1,725 5.00%, 12/1/23, Ser. B Aaa/AAA 1,803,763
2,820 5.00%, 12/1/27, Ser. A Aaa/AAA 2,933,336
1,500 5.00%, 12/1/27, Ser. B Aaa/AAA 1,560,285
1,500 Garfield Cnty. School Dist. Re-2, GO, 5.00%, 12/1/25 (FSA) Aaa/NR 1,563,915
  La Plata Cnty. School Dist. No. 9-R, Durango, GO (MBIA) (Pre-refunded @ $100, 11/1/12) (a),    
1,000 5.25%, 11/1/23 Aaa/NR 1,096,440
2,000 5.25%, 11/1/25 Aaa/NR 2,192,880
4,000 Saddle Rock Met. Dist., GO, 5.35%, 12/1/31 (Radian) NR/AA 4,122,160
2,500 School Mines Auxiliary Facs. Rev., 5.00%, 12/1/37 (AMBAC) Aaa/AAA 2,579,375
      19,666,374



PIMCO Municipal Income Fund III 

Schedule of Investments

December 31, 2005 (unaudited) (continued)



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

Florida–6.5%

   
$3,480 Brevard Cnty. Health Facs. Auth. Rev., 5.00%, 4/1/34 A2/A $3,504,708
8,000 Highlands Cnty. Health Facs. Auth. Rev., Adventist Health System,
5.25%, 11/15/23, Ser. B
A2/A+ 8,360,000
2,500 Hillsborough Cnty. Industrial Dev. Auth. Rev., Tampa General Hospital, 5.25%, 10/1/34, Ser. B A3/NR 2,586,525
1,485 Julington Creek Plantation Community Dev. Dist., Special Assessment Rev., 5.00%, 5/1/29 (MBIA) Aaa/AAA 1,553,414
1,000 Orange Cnty. Housing Finance Auth. Multifamily Rev., Palm Grove Gardens, 5.25%, 1/1/28, Ser. G Aaa/NR 1,028,840
15,000 Pinellas Cnty. Health Facs. Auth. Rev., Baycare Health, 5.50%, 11/15/33 A1/NR 15,824,400
7,500 South Miami Health Facs. Auth., Hospital Rev., Baptist Health, 5.25%, 11/15/33 Aa3/AA− 7,782,000
5,615 Tampa, Water & Sewer Rev., 5.00%, 10/1/26, Ser. A Aa2/AA 5,845,833
      46,485,720
 

Georgia–0.6%

   
4,000 Griffin Combined Public Utility Rev., 5.00%, 1/1/32 (AMBAC) Aaa/AAA 4,188,680
 

Idaho–1.0%

   
  State Building Auth. Building Rev., Ser. A (XLCA)    
1,000 5.00%, 9/1/33 Aaa/AAA 1,036,430
5,750 5.00%, 9/1/43 Aaa/AAA 5,948,778
      6,985,208
 

Illinois–8.2%

   
2,250 Chicago, GO, 5.00%, 1/1/31, Ser. A (MBIA) Aaa/AAA 2,321,573
  Chicago, Lake Shore East, Special Assessment,    
1,600 6.625%, 12/1/22 NR/NR 1,734,752
3,456 6.75%, 12/1/32 NR/NR 3,750,797
5,000 Chicago Board of Education, GO,
5.00%, 12/1/31, Ser. C (FSA) (Pre-refunded @ $100,12/1/11) (a)
Aaa/AAA 5,383,050
500 Chicago Board of Education School Reform, GO, zero coupon, 12/1/28, Ser. A (FGIC) Aaa/AAA 166,080
3,000 Chicago Kingsbury Redev. Project, Tax Allocation, 6.57%, 2/15/13, Ser. A NR/NR 3,120,570
7,000 Chicago Motor Fuel Tax Rev., 5.00%, 1/1/33, Ser. A (AMBAC) Aaa/AAA 7,242,900
4,000 Chicago Park Dist., GO, 5.00%, 1/1/29, Ser. D (FGIC) Aaa/AAA 4,117,840
2,500 Chicago Water Rev., 5.00%, 11/1/31 (AMBAC) (Pre-refunded @ $100, 11/1/11) (a) Aaa/AAA     2,682,250
  Educational Facs. Auth. Rev., Univ. of Chicago,    
4,780 5.00%, 7/1/33 Aa1/AA 4,955,092
220 5.00%, 7/1/33 (Pre-refunded @ $100, 7/1/13) (a) Aa1/AA 238,856
165 5.25%, 7/1/41 Aa1/AA 174,080
4,160 5.25%, 7/1/41 (Pre-refunded @ $101, 7/1/11) (a) Aa1/AA 4,539,978
9,045 Metropolitan Pier & Exposition Auth., Dedicated State Tax Rev.,    
  McCormick Place Expansion, 5.25%, 6/15/42 (MBIA) Aaa/AAA 9,545,912



PIMCO Municipal Income Fund III 

Schedule of Investments

December 31, 2005 (unaudited) (continued)



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

Illinois (continued)

   
$4,300 Round Lake, Special Tax Rev., 6.70%, 3/1/33 NR/NR $4,558,946
1,175 State Health Facs. Auth. Rev., Elmhurst Memorial Healthcare, 5.50%, 1/1/22 A2/NR 1,237,592
3,050 University of Illinois Rev., 5.00%, 4/1/30, Ser. A (AMBAC) Aaa/AAA 3,137,474
      58,907,742
 

Indiana–3.8%

   
7,535 Bond Bank Rev., 5.00%, 2/1/33, Ser. A (FSA) Aaa/AAA 7,774,236
3,000 Brownsburg 1999 School Building Corp. Rev., 5.25%, 3/15/25, Ser. A (FSA) (Pre-refunded @ $100, 9/15/13) (a) Aaa/AAA 3,312,960
1,375 Fort Wayne Pollution Control Rev., 6.20%, 10/15/25 B1/B 1,017,967
5,000 Indianapolis Local Public Improvement Board, Tax Allocation,
5.00%, 2/1/29, Ser. G (MBIA)
Aaa/AAA 5,174,350
  Michigan City Area Wide School Building Corp., Rev. (FGIC),    
2,500 zero coupon, 1/15/21 Aaa/AAA 1,265,900
1,000 zero coupon, 7/15/21 Aaa/AAA 495,020
1,000 zero coupon, 1/15/22 Aaa/AAA 480,920
1,000 Plainfield Parks Facs. Corp. Lease Rent Rev.,
5.00%, 1/15/22 (AMBAC)
Aaa/AAA 1,043,470
3,500 State Dev. Finance Auth. Pollution Control Rev.,
5.00%, 3/1/30 (AMBAC)
Aaa/AAA 3,502,730
3,455 Valparaiso, Middle Schools Building Corp. Rev.,
5.00%, 7/15/24 (MBIA)
Aaa/AAA 3,596,068
      27,663,621
 

Iowa–1.5%

   
1,000 Tobacco Settlement Auth., Tobacco Settlement Rev.,
5.60%, 6/1/35, Ser. B (Pre-refunded @ $101, 6/1/11) (a)
Baa3/AAA 1,099,450
11,010 Tobacco Settlement Auth. of Iowa Rev., zero coupon, 6/1/34, Ser. B Baa3/BBB 10,001,264
      11,100,714
 

Kentucky–0.9%

   
  Economic Dev. Finance Auth. Hospital Facs. Rev.,    
1,000 Catholic Healthcare Partners, 5.25%, 10/1/30 Aa3/AA− 1,038,400
4,600 St. Luke's Hospital, 6.00%, 10/1/19 A3/A 5,181,164
      6,219,564
 

Louisiana–0.9%

   
5,000 Public Facs. Auth. Rev., Ochsner Clinic Foundation,
5.50%, 5/15/32, Ser. B
A3/NR 5,066,000
1,595 Tobacco Settlement Financing Corp. Rev.,
5.875%, 5/15/39, Ser. 2001-B
Baa3/BBB 1,673,681
      6,739,681
 

Maryland–0.2%

   
1,500 State Health & Higher Educational Facs. Auth. Rev., Calvert Health Systems, 5.50%, 7/1/36 A2/NR 1,590,735



PIMCO Municipal Income Fund III 

Schedule of Investments

December 31, 2005 (unaudited) (continued)



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

Massachusetts–3.4%

   
$1,000 State Dev. Finance Agcy. Rev., 5.75%, 7/1/33, Ser. C Baa1/BBB $1,063,440
7,000 State Health & Educational Facs. Auth. Rev., Harvard Univ.,
5.125%, 7/15/37, Ser. FF
Aaa/AAA 7,317,450
4,910 State Housing Finance Agcy., Housing Rev., 5.125%, 6/1/43, Ser. H Aa3/AA− 4,993,666
3,225 State Water Pollution Abatement Trust, 5.00%, 8/1/32, Ser. 8 Aaa/AAA 3,351,065
7,555 State Water Resources Auth. Rev., 5.00%, 8/1/32, Ser. J (FSA) Aaa/AAA 7,793,663
      24,519,284
 

Michigan–7.0%

   
12,240 Detroit Water Supply System, 5.00%, 7/1/34, Ser. B (MBIA) Aaa/AAA 12,743,798
5,000 State Building Auth. Rev., 5.00%, 10/15/26, Ser. III (FSA) Aaa/AAA 5,212,550
  State Hospital Finance Auth. Rev.,    
175 Detroit Medical Center, 5.25%, 8/15/23 Ba3/BB− 161,732
4,000 Henry Ford Health System, 5.00%, 3/1/17 A1/A 4,158,160
5,405 Oakwood Group, 5.75%, 4/1/32, Ser. A A2/A 5,708,653
575 Oakwood Group, 6.00%, 4/1/22, Ser. A A2/A 626,255
20,000 Trinity Health Credit, 5.375%, 12/1/30 Aa3/AA− 21,040,200
1,000 State Technical Univ., 5.00%, 10/1/33 (XLCA) Aaa/AAA 1,033,650
      50,684,998
 

Minnesota–0.3%

   
2,400 Upsala Independent School Dist. No. 487, GO, 5.00%, 2/1/28 (FGIC) Aaa/AAA 2,510,376
 

Mississippi–0.6%

   
  Business Finance Corp., Pollution Control Rev.,    
3,000 5.875%, 4/1/22 Ba1/BBB− 3,046,500
1,250 5.90%, 5/1/22 Ba1/BBB− 1,271,388
      4,317,888
 

Missouri–3.0%

   
4,000 Bi-State Dev. Agcy. Rev., Missouri Illinois Met. Dist.,
5.00%, 10/1/32 (FSA)
Aaa/AAA 4,161,040
1,350 St. Louis Cnty. Industrial Dev. Auth., Housing Dev. Rev.,
5.20%, 1/20/36 (GNMA)
NR/AAA 1,380,226
  St. Louis Industrial Dev. Auth. Rev. (GNMA)    
1,500 5.125%, 12/20/29 NR/AAA 1,542,360
1,500 5.125%, 12/20/30 NR/AAA 1,533,405
4,365 State Environmental Impt. & Energy Resources Auth., Water Pollution Control Rev., 5.00%, 7/1/23, Ser. B Aaa/NR 4,604,333
7,500 State Health & Educational Facs. Auth., Health Facs.,
St. Anthony's Medical Center, 6.25%, 12/1/30
(Pre-refunded @ $101, 12/1/10) (a)
A2/A 8,478,000
      21,699,364
 

Montana–1.6%

   
11,250 Forsyth Pollution Control Rev., Puget Sound Energy,
5.00%, 3/1/31 (AMBAC)
Aaa/AAA 11,739,038



PIMCO Municipal Income Fund III 

Schedule of Investments

December 31, 2005 (unaudited) (continued)



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

Nevada–0.6%

   
$3,355 Henderson Health Care Fac. Rev., Catholic Healthcare West, 5.125%, 7/1/28 A3/A− $3,374,325
980 Henderson Local Impt. Dists., Special Assessment, 5.80%, 3/1/23 NR/NR 1,010,478
      4,384,803
 

New Hampshire–0.7%

   
  Manchester Water Works Rev. (FGIC),    
1,500 5.00%, 12/1/28 Aaa/AAA 1,567,635
3,250 5.00%, 12/1/34 Aaa/AAA 3,376,685
      4,944,320
 

New Jersey–4.7%

   
1,000 Camden Cnty., Improvement Auth., 5.00%, 2/15/35, Ser. A Baa3/BBB 986,360
1,540 Camden Cnty., Improvement Auth. Rev.,
6.00%, 2/15/27 (Pre-refunded @ 102, 2/15/07) (a)
Baa3/BBB 1,612,904
4,500 Economic Dev. Auth., Economic Dev. Rev., Kapkowski Rd. Landfill, 6.50%, 4/1/28 Baa3/NR 5,237,010
300 Economic Dev. Auth., Industrial Dev. Rev., Newark Airport,
7.00%, 10/1/14
Ba3/NR 308,460
  Health Care Facs. Financing Auth. Rev.,    
3,000       Pascack Valley Hospital, 6.625%, 7/1/36 NR/B+ 2,967,030
2,000       Somerset Medical Center, 5.50%, 7/1/33 Baa3/NR 2,031,860
2,500       Middlesex Cnty. Pollution Control Auth., Rev., 5.75%, 9/15/32 Ba1/BBB− 2,623,750
2,000       South Port Corp., Rev., 5.10%, 1/1/33 NR/A 2,071,020
1,500 State Educational Fac. Auth. Rev., Fairleigh Dickinson Univ.,
6.00%, 7/1/25, Ser. D
NR/NR 1,601,415
  Tobacco Settlement Financing Corp. Rev.,    
525 6.00%, 6/1/37 Baa3/BBB 544,136
1,000 6.125%, 6/1/24 Baa3/BBB 1,087,550
230 6.125%, 6/1/42 Baa3/BBB 241,196
350 6.25%, 6/1/43 Baa3/BBB 379,936
10,750 6.75%, 6/1/39 Baa3/BBB 12,000,332
      33,692,959
 

New Mexico–0.1%

   
1,000 Farmington Pollution Control Rev., 5.80%, 4/1/22 Baa2/BBB 1,012,710
 

New York–5.5%

   
10,000 Metropolitan Transportation Auth. Rev., 5.25%, 11/15/32, Ser. B A2/A 10,600,100
  New York City Municipal Water Finance Auth., Water & Sewer System Rev.,    
5,000 5.00%, 6/15/35, Ser. C Aa2/AA+ 5,188,150
1,500 5.00%, 6/15/39, Ser. A Aa2/AA+ 1,551,105
  State Dormitory Auth. Rev.,    
11,590 Memorial Sloan-Kettering Center, 5.00%, 7/1/34, Ser. 1 Aa2/AA 11,932,600
4,000 Saint Barnabas Hospital, 5.125%, 2/1/22, Ser. A (AMBAC-FHA) Aaa/AAA 4,238,720



PIMCO Municipal Income Fund III 

Schedule of Investments

December 31, 2005 (unaudited) (continued)



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

New York (continued)

   
$3,800 State Personal Income Tax, 5.00%, 3/15/32 (Pre-refunded @ $100, 3/15/13) (a) A1/AA $4,121,822
2,000 State Environmental Facs. Corp. Rev., 5.00%, 6/15/28 Aaa/AAA 2,093,520
      39,726,017
 

North Carolina–1.6%

   
2,000 Charlotte-Mecklenburg Hospital Auth., Healthcare System Rev., 5.00%, 1/15/33, Ser. A Aa3/AA 2,056,020
  Eastern Municipal Power Agcy, Power System Rev.,    
2,000 5.125%, 1/1/23, Ser. D Baa2/BBB 2,069,380
2,000 5.125%, 1/1/26, Ser. D Baa2/BBB 2,056,120
3,795 5.375%, 1/1/17, Ser. C Baa2/BBB 4,034,275
1,500 Medical Care Commission, Health Care Facs. Rev., Cleveland Cnty., 5.00%, 7/1/35 (AMBAC) Aaa/AAA 1,553,490
      11,769,285
 

Ohio–0.4%

   
2,500 Lorain Cnty. Hospital Rev., Catholic Healthcare, 5.375%, 10/1/30 Aa3/AA− 2,606,575
 

Oklahoma–0.5%

   
3,500 Tulsa Cnty. Industrial Auth. Rev., Legacy Apartments,
4.90%, 11/20/46 (FHA-GNMA)
Aaa/NR 3,534,965
 

Pennsylvania–3.8%

   
4,350 Allegheny Cnty. Hospital Dev. Auth. Rev., 9.25%, 11/15/30, Ser. B Ba3/B+ 5,158,882
1,500 Cumberland Cnty. Auth. Retirement Community Rev., Wesley Affiliated Services, 7.25%, 1/1/35, Ser. A NR/NR 1,613,190
3,250 Delaware River Joint Toll Bridge, Commission Bridge Rev.,
5.00%, 7/1/28
A2/A− 3,377,465
3,000 Lehigh Cnty. General Purpose Auth. Rev., St. Luke's Bethlehem Hospital, 5.375%, 8/15/33 Baa1/BBB 3,089,460
5,000 Philadelphia School Dist., GO, 5.125%, 6/1/34, Ser. D ( FGIC) Aaa/AAA 5,273,750
2,500 Radnor Township School Dist., GO, 5.00%, 2/15/35, Ser. B (FSA) Aaa/NR 2,618,425
6,300 St. Mary Hospital Auth., Bucks Cnty. Rev., 5.00%, 12/1/28
(Partially pre-refunded 6/1/08 @ $101) (a)
Aa2/NR 6,318,207
      27,449,379
 

Puerto Rico–0.3%

   
2,200 Electric Power Auth., Power Rev., 5.125%, 7/1/29, Ser. NN A3/A− 2,266,836
 

South Carolina–2.1%

   
7,500 Florence Cnty. Rev., McLeod Regional Medical Center, 11/1/31, Ser. A (FSA) Aaa/AAA 7,814,475
6,700 Jobs Economic Dev. Auth. Rev., Bon Secours Health System, 5.625%, 11/15/30 A3/A− 6,971,819
      14,786,294
 

Tennessee–0.2%

   
1,250 Knox Cnty. Health Educational & Housing Facs. Board Hospital Facs. Rev., Catholic Healthcare Partners, 5.25%, 10/1/30 Aa3/AA− 1,300,938



PIMCO Municipal Income Fund III 

Schedule of Investments

December 31, 2005 (unaudited) (continued)



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

Texas–10.8%

   
$4,135 Canyon Independent School Dist., GO, 5.00%, 2/15/28, Ser. A (PSF-GTD) NR/AAA $4,290,021
2,500 Columbia & Brazoria Independent School Dist., GO, 5.00%, 8/1/29 (PSF-GTD) NR/AAA 2,595,625
1,300 Comal Cnty. Health Facs., McKenna Memorial Hospital Project Rev., 6.25%, 2/1/32 Baa3/BBB− 1,382,225
  Denton Independent School Dist., GO    
6,000 zero coupon, 8/15/26 (PSF-GTD) Aaa/AAA 1,980,480
6,000 zero coupon, 8/15/27 (PSF-GTD) Aaa/AAA 1,862,280
5,000 zero coupon, 8/15/28 (PSF-GTD) Aaa/AAA 1,460,050
6,000 zero coupon, 8/15/29 (PSF-GTD) Aaa/AAA 1,648,980
2,000 zero coupon, 8/15/30 (PSF-GTD) Aaa/AAA 516,900
8,000 zero coupon, 8/15/31 (PSF-GTD) Aaa/AAA 1,945,280
4,400 Harris Cnty., GO, 5.125%, 8/15/31
(Pre-refunded @ $100, 8/15/12) (a)
Aa1/AA+ 4,751,164
  Harris Cnty. Health Facs. Dev. Corp. Rev.,    
5,000 Christus Health,
5.375%, 7/1/29, Ser. A, (MBIA)
(Pre-refunded @ $101, 7/1/09) (a)
Aaa/AAA 5,366,750
2,750 St. Luke's Episcopal Hospital, 5.375%, 2/15/26, Ser. A
(Pre-refunded @ $100, 8/15/11) (a)
NR/AA− 2,992,990
19,500 Harris Cnty. Rev., 5.125%, 8/15/32 (FSA) Aaa/AAA 20,347,860
4,005 Houston, GO, 5.00%, 3/1/25 (MBIA) Aaa/AAA 4,170,366
5,000 Houston Water & Sewer System Rev., 5.00%, 12/1/30, Ser. A (FSA) (Pre-refunded @ $100, 12/1/12) (a) Aaa/AAA 5,364,400
7,000 Judson Independent School Dist., GO, 5.00%, 2/1/30 (PSF-GTD) Aaa/NR 7,195,230
415 Leander Independent School Dist., GO, 5.00%, 8/15/32 (PSF-GTD) NR/AAA 428,649
  Mesquite Independent School Dist. No. 1, GO, Ser. A (PSF-GTD)    
3,825 zero coupon, 8/15/15 NR/AAA 2,541,254
1,365 zero coupon, 8/15/16 NR/AAA 841,468
1,000 zero coupon, 8/15/18 NR/AAA 551,070
1,000 zero coupon, 8/15/19 NR/AAA 521,280
1,000 zero coupon, 8/15/20 NR/AAA 493,580
2,105 Northwest Harris Cnty. Municipal Utility Dist. No. 16, GO,
5.30%, 10/1/29 (Radian)
NR/AA 2,170,571
2,000 University of Texas, 5.00%, 7/1/26, Ser. B Aaa/AAA 2,101,580
      77,520,053
 

Utah–0.8%

   
1,750 County of Weber, IHC Health Services Rev., 5.00%, 8/15/30 Aa1/AA+ 1,784,195
4,100 Salt Lake Cnty. Hospital Rev., IHC Health Services, 5.125%, 2/15/33 (AMBAC) Aaa/AAA 4,253,135
      6,037,330



PIMCO Municipal Income Fund III 

Schedule of Investments

December 31, 2005 (unaudited) (continued)



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

Washington–4.9%

   
$6,375 Chelan Cnty. Public Utility Dist. Rev., 5.125%, 7/1/33, Ser. C (AMBAC) Aaa/AAA $6,629,745
3,000 Port Seattle, Rev., 5.00%, 9/1/24 (FGIC) Aaa/AAA 3,123,780
23,545 Tobacco Settlement Auth., Tobacco Settlement Rev., 6.50%, 6/1/26 Baa3/BBB 25,315,349
      35,068,874
 

Wisconsin–0.1%

   
560 Badger Tobacco Asset Securitization Corp. Rev., 6.00%, 6/1/17 Baa3/BBB 586,902
             
  Total Municipal Bonds & Notes (cost—$608,488,255)   647,449,138
             

VARIABLE RATE NOTES (b)(c)(d)–9.9%

 

Arizona–0.2%

   
1,000 Salt River Project Agricultural Improvement & Power Dist. Rev., 9.95%, 1/1/35, Ser. 1227 Aa2/NR 1,252,750
 

Colorado–0.4%

   
2,490 City of Colorado Springs, 8.919%, 11/15/30, Ser. 457 Aa2/NR 2,875,751
 

Florida–0.4%

   
2,554 State Department of Transportation Turnpike Rev.,
8.67%, 7/1/31, Ser. 1128
Aa2/NR 2,788,457
 

Illinois–0.3%

   
1,990 Dev. Finance Auth., Gas Supply Rev., 8.395%, 2/1/33 (AMBAC) NR/NR 2,295,564
 

Michigan–1.8%

   
  Detroit Water Supply System    
5,720 8.259%, 1/1/11 (MBIA) NR/AAA 7,069,977
4,990 8.580%, 7/1/11 (FSA) NR/AAA 6,264,346
      13,334,323
 

New York–2.8%

   
7,770 Liberty Dev. Corp. Rev., 8.20%, 10/1/35, Ser. 1183 Aa3/NR 10,951,349
1,636 New York City Municipal Water Finance Auth., Water & Sewer System Rev., 9.95%, 6/15/37, Ser. 1226 Aa2/NR 1,954,038
6,000 State Dormitory Auth., Univ. & College Impt., 9.95%, 3/15/35, Ser. 1216 AA/NR 7,117,200
      20,022,587
 

Ohio–0.5%

   
  Ohio Air Quality Dev. Auth. (FGIC) ,    
1,000 8.95%, 1/1/34, Ser. 1219 Aaa/NR 1,068,500
2,075 8.95%, 1/1/34, Ser. 1223 Aaa/NR 2,216,972
      3,285,472
 

Texas–1.9%

   
1,705 Crowley Independent School Dist., GO, 7.68%, 8/1/35, Ser. 1171 (PSF-GTD) Aaa/NR 1,815,757
2,450 Dallas Area Rapid Transit Rev., 7.684%, 12/1/32 (FGIC) NR/NR 2,869,758



PIMCO Municipal Income Fund III 

Schedule of Investments

December 31, 2005 (unaudited) (concluded)



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

Texas (continued)

   
$2,028 Denton Independent School Dist., GO, 9.91%, 8/15/33, Ser. 951 (PSF-GTD) Aaa/NR $2,348,453
1,870 Mansfield Independent School Dist., GO, 8.370%, 2/15/28 (PSF-GTD) NR/NR 2,318,015
2,000 Sabine River Auth. Rev., 5.20%, 5/1/28 Baa2/BBB− 2,015,620
2,060 University of Texas Rev., 7.847%, 8/15/33 NR/NR 2,457,807
      13,825,410
 

Washington–1.6%

   
  King Cnty., Sewer Rev.,    
1,520 8.489%, 7/1/11 (FGIC) NR/AAA 1,873,400
3,000 9.95%, 1/1/35, Ser. 1200 (FSA) NR/NR 3,421,500
3,655 Port Tacoma, GO, 8.073%, 12/1/33 (AMBAC) NR/NR 4,424,853
1,510 Seattle Drain & Wastewater Rev., 8.516%, 7/1/10 (FGIC) NR/NR 1,816,998
      11,536,751
             
  Total Variable Rate Notes (cost–$65,515,839)   71,217,065
             

U.S. TREASURY BILLS (f)–0.3%

2,355 3.81%-3.88%,3/2/06-3/16/06 (cost–$2,336,880)   2,336,880
 

Total Investments before options written (cost–$676,340,974)–100.0%

  721,003,083
             

OPTIONS WRITTEN (e)–(0.0)%

Contracts      
 

Call Options–(0.0)%

   
  U.S. Treasury Notes 10 yr. Futures, Chicago Board of Trade,    
256 strike price $110, expires 2/24/06   (140,000)
478 strike price $111, expires 2/24/06   (119,500)
      (259,500)
 

Put Options–(0.0)%

   
  U.S. Treasury Notes 10 yr. Futures, Chicago Board of Trade,    
275 strike price $106, expires 2/24/06   (21,484)
478 strike price $107, expires 2/24/06   (74,688)
      (96,172)
             
  Total Options Written (premiums received–$482,376)   (355,672)
 

Total Investments net of options written (cost–$675,858,598)–100.0%

  $720,647,411

    




Notes to the 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 may be 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 are valued at the last sale price on the exchange that is the primary market for such securities, or the last quoted bid 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. The independent pricing service uses 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. Short-term investments 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 at the close of regular trading (normally, 4:00 p.m. Eastern time) on the New York Stock Exchange on each day the exchange is open for business.
(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.
(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)  Residual Interest/Tax Exempt Municipal Bonds – The interest rate shown bears an inverse relationship to the interest rate on another security or the value of an index.
(d)  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 December 31, 2005.
(e)  Non-income producing.
(f)  All or partial amount segregated as initial margin on futures contracts or collateral for options written.

Glossary:

AMBAC – insured by American Municipal Bond Assurance Corp.

CP – Certificates of Participation

CR – Custodian Receipt

FGIC – insured by Financial Guaranty Insurance Co.

FHA – insured by Federal Housing Administration

FSA – insured by Financial Security Assurance, Inc.

GNMA – insured by Government National Mortgage Association

GO – General Obligation Bond

GTD – Guaranteed

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 December 31, 2005:

Type Notional
Amount
(000)
Expiration
Date
Unrealized
Appreciation
(Depreciation)
Long:   U.S. Treasury Notes 5 yr. Futures $ 99,200     3/22/06   $ 8,297  
Short: U.S. Treasury Bond Futures   (162,000   3/22/06     (3,575,672
  U.S. Treasury Note 10 yr. Futures   (17,900   3/22/06     (177,797
              $ (3,745,172

(2) Transactions in options written for the twelve months ended December 31, 2005:


  Contracts Premiums
Options outstanding, September 30, 2005   2,494   $ 682,598  
Options written   1,487     482,376  
Options expired   (2,494   (682,598
Options outstanding, December 31, 2005   1,487   $ 482,376  



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.

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

Date: February 15, 2006

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

Date: February 15, 2006

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: February 15, 2006

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

Date: February 15, 2006