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: June 30, 2006

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
June 30, 2006 (unaudited)


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

MUNICIPAL BONDS & NOTES–90.2%

 

Alabama–1.4%

   
  Birmingham, GO, Ser. B (AMBAC),    
$  1,000 5.00%, 12/1/27 Aaa/AAA $    1,015,820
2,560 5.00%, 12/1/32 Aaa/AAA 2,593,459
5,000 Birmingham Baptist Medical Centers Special Care Facs. Financing Auth. Rev., 5.00%, 11/15/30, Ser. A Baa1/NR 4,875,900
1,500 Colbert Cnty., Northwest Health Care Auth., Health Care Facs. Rev.,
5.75%, 6/1/27
Baa3/NR 1,493,580
      9,978,759
 

Alaska–0.7%

   
  State Housing Finance Corp. Rev.,    
3,900 5.00%, 12/1/33, Ser. A Aaa/AAA 3,926,676
1,000 5.25%, 6/1/32, Ser. C (MBIA) Aaa/AAA 1,002,320
      4,928,996
 

Arizona–2.8%

   
2,200 Health Facs. Auth. John C. Lincoln Health Network Rev.,
7.00%, 12/1/25, (Pre-refunded @ $102, 12/1/10) (a)
NR/BBB 2,499,904
1,500 Maricopa Cnty. Pollution Control Corp., Pollution Control Rev.,
5.05%, 5/1/29 (AMBAC)
Aaa/AAA 1,534,905
16,000 Salt River Project Agricultural Improvement & Power Dist. Rev.,
5.00%, 1/1/37, Ser. A (c)
Aa1/AA 16,363,840
        20,398,649
 

Arkansas–0.1%

   
7,000 Arkansas Dev. Finance Auth. Rev., zero coupon, 7/1/46 (AMBAC) Aaa/AAA 898,660
 

California–7.8%

   
1,000 Alameda Public Financing Auth. Rev., 7.00%, 6/1/09 NR/NR 997,890
2,000 Chula Vista Community Facs. Dist., Special Tax, 5.25%, 9/1/30 NR/NR 1,972,920
  Golden State Tobacco Securitization Corp., Tobacco Settlement Rev.,
Ser. 2003-A-1,
   
27,585 6.25%, 6/1/33 Baa3/BBB 30,079,236
21,000 6.75%, 6/1/39 Baa3/BBB 23,511,600
      56,561,646
 

Colorado–2.5%

   
  El Paso Cnty., CP (AMBAC),    
1,735 5.00%, 12/1/23, Ser. A Aaa/AAA 1,781,758
1,725 5.00%, 12/1/23, Ser. B Aaa/AAA 1,771,489
2,820 5.00%, 12/1/27, Ser. A Aaa/AAA 2,880,263
1,500 5.00%, 12/1/27, Ser. B Aaa/AAA 1,532,055
1,500 Garfield Cnty. School Dist. Re-2, GO, 5.00%, 12/1/25 (FSA) Aaa/NR 1,537,065
2,000 La Plata Cnty. School Dist. No. 9-R, Durango, GO,
5.25%, 11/1/25, (Pre-refunded @ $100, 11/1/12) (MBIA) (a)
Aaa/NR 2,137,120
4,000 Saddle Rock Met. Dist., GO, 5.35%, 12/1/31 (Radian) NR/AA 4,054,040

     




PIMCO Municipal Income Fund III 
Schedule of Investments
June 30, 2006 (unaudited) (continued)


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

Colorado (continued)

   
$  2,500 School Mines Auxiliary Facs. Rev., 5.00%, 12/1/37 (AMBAC) Aaa/AAA $    2,535,425
      18,229,215
 

Florida–6.4%

   
3,480 Brevard Cnty. Health Facs. Auth. Rev., 5.00%, 4/1/34 A2/A 3,490,370
8,000 Highlands Cnty. Health Facs. Auth. Rev., Adventist Health System,
5.25%, 11/15/23, Ser. B
A2/A+ 8,203,600
2,500 Hillsborough Cnty. Industrial Dev. Auth. Rev., Tampa General
Hospital, 5.25%, 10/1/34, Ser. B
A3/NR 2,558,700
1,485 Julington Creek Plantation Community Dev. Dist., Special Assessment Rev., 5.00%, 5/1/29 (MBIA) Aaa/AAA 1,521,962
1,000 Orange Cnty. Housing Finance Auth. Multifamily Rev., Palm Grove
Gardens, 5.25%, 1/1/28, Ser. G
Aaa/NR 1,017,020
15,000 Pinellas Cnty. Health Facs. Auth. Rev., Baycare Health,
5.50%, 11/15/33, (Pre-refunded @ $100, 5/15/13) (a)
Aa3/NR 16,187,850
7,500 South Miami Health Facs. Auth., Hospital Rev., Baptist Health,
5.25%, 11/15/33
Aa3/AA− 7,662,525
5,615 Tampa, Water & Sewer Rev., 5.00%, 10/1/26, Ser. A Aa2/AA 5,735,161
        46,377,188
 

Georgia–0.6%

   
4,000 Griffin Combined Public Utility Rev., 5.00%, 1/1/32 (AMBAC) Aaa/AAA 4,105,680
 

Idaho–0.9%

   
  State Building Auth. Building Rev., Ser. A (XLCA),    
1,000 5.00%, 9/1/33 Aaa/AAA 1,019,200
5,750 5.00%, 9/1/43 Aaa/AAA 5,843,955
      6,863,155
 

Illinois–8.4%

   
2,250 Chicago, GO, 5.00%, 1/1/31, Ser. A (MBIA) Aaa/AAA 2,285,550
  Chicago, Lake Shore East, Special Assessment,    
1,600 6.625%, 12/1/22 NR/NR 1,706,416
3,456 6.75%, 12/1/32 NR/NR 3,690,628
5,000 Chicago Board of Education, GO, 5.00%, 12/1/31, Ser. C,
(Pre-refunded @ $100,12/1/11) (FSA) (a)
Aaa/AAA 5,253,000
500 Chicago Board of Education School Reform, GO,
zero coupon, 12/1/28, Ser. A (FGIC)
Aaa/AAA 159,000
3,000 Chicago Kingsbury Redev. Project, Tax Allocation,
6.57%, 2/15/13, Ser. A
NR/NR 3,082,500
7,000 Chicago Motor Fuel Tax Rev., 5.00%, 1/1/33, Ser. A (AMBAC) Aaa/AAA 7,123,760
4,000 Chicago Park Dist., GO, 5.00%, 1/1/29, Ser. D (FGIC) Aaa/AAA 4,058,080
2,500 Chicago Water Rev.,
5.00%, 11/1/31, (Pre-refunded @ $100, 11/1/11) (AMBAC) (a)
Aaa/AAA 2,624,700
2,935 City of Springfield Rev., 5.00%, 3/1/35 (MBIA) Aaa/AAA 2,981,989
  Educational Facs. Auth. Rev., Univ. of Chicago,    
4,780 5.00%, 7/1/33 Aa1/AA 4,861,690

       




PIMCO Municipal Income Fund III 
Schedule of Investments
June 30, 2006 (unaudited) (continued)


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

Illinois (continued)

   
  Educational Facs. Auth. Rev., Univ. of Chicago,    
$      220 5.00%, 7/1/33, (Pre-refunded @ $100, 7/1/13) (a) Aa1/AA $      232,470
165 5.25%, 7/1/41 Aa1/AA 170,643
4,160 5.25%, 7/1/41, (Pre-refunded @ $101, 7/1/11) (a) Aa1/AA 4,427,224
9,045 Metropolitan Pier & Exposition Auth., Dedicated State Tax Rev.,
McCormick Place Expansion, 5.25%, 6/15/42 (MBIA)
Aaa/AAA 9,331,093
4,300 Round Lake, Special Tax Rev., 6.70%, 3/1/33 NR/NR 4,559,978
1,175 State Health Facs. Auth. Rev., Elmhurst Memorial Healthcare,
5.50%, 1/1/22
A2/NR 1,212,447
3,050 Univ. Rev., 5.00%, 4/1/30, Ser. A (AMBAC) Aaa/AAA 3,092,121
      60,853,289
 

Indiana–3.5%

   
7,535 Bond Bank Rev., 5.00%, 2/1/33, Ser. A (FSA) Aaa/AAA 7,646,744
3,000 Brownsburg 1999 School Building Corp. Rev., 5.25%, 3/15/25, Ser. A,
(Pre-refunded @ $100, 9/15/13) (FSA) (a)
Aaa/AAA 3,212,820
1,375 Fort Wayne Pollution Control Rev., 6.20%, 10/15/25 Caa1/B− 1,321,114
5,000 Indianapolis Local Public Improvement Board, Tax Allocation,
5.00%, 2/1/29, Ser. G (MBIA)
Aaa/AAA 5,083,750
  Michigan City Area Wide School Building Corp., Rev. (FGIC),    
2,500 Zero coupon, 1/15/21 Aaa/AAA 1,248,125
1,000 Zero coupon, 7/15/21 Aaa/AAA 487,460
1,000 Zero coupon, 1/15/22 Aaa/AAA 473,780
1,000 Plainfield Parks Facs. Corp. Lease Rent Rev., 5.00%, 1/15/22 (AMBAC) Aaa/AAA 1,028,800
  Portage Industrial Economic Dev. Rev. (c),    
1,000 5.00%, 7/15/23 NR/BBB+ 989,820
775 5.00%, 1/15/27 NR/BBB+ 760,461
3,500 State Dev. Finance Auth. Pollution Control Rev.,
5.00%, 3/1/30 (AMBAC)
Aaa/AAA 3,501,120
        25,753,994
 

Iowa–1.6%

   
1,000 Tobacco Settlement Auth., Tobacco Settlement Rev.,
5.60%, 6/1/35, Ser. B, (Pre-refunded @ $101, 6/1/11) (a)
Baa3/AAA 1,074,160
11,010 Tobacco Settlement Auth. of Iowa Rev., zero coupon, 6/1/34, Ser. B Baa3/BBB 10,322,536
      11,396,696
 

Kentucky–0.8%

   
  Economic Dev. Finance Auth. Hospital Facs. Rev.,    
1,000 Catholic Healthcare Partners, 5.25%, 10/1/30 Aa3/AA− 1,022,310
4,600 St. Luke's Hospital, 6.00%, 10/1/19 A3/A 5,024,442
      6,046,752
 

Louisiana–0.9%

   
5,000 Public Facs. Auth. Rev., Ochsner Clinic Foundation,
5.50%, 5/15/32, Ser. B
A3/NR 5,070,850

     




PIMCO Municipal Income Fund III 
Schedule of Investments
June 30, 2006 (unaudited) (continued)


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

Lousiana (continued)

   
$  1,595 Tobacco Settlement Financing Corp. Rev., 5.875%, 5/15/39, Ser. 2001 B Baa3/BBB $    1,671,608
      6,742,458
 

Maryland–0.2%

   
1,500 State Health & Higher Educational Facs. Auth. Rev., Calvert Health Systems, 5.50%, 7/1/36 A2/NR 1,561,890
 

Massachusetts–3.3%

   
1,000 State Dev. Finance Agcy. Rev., 5.75%, 7/1/33, Ser. C Baa1/BBB+ 1,042,860
7,000 State Health & Educational Facs. Auth. Rev., Harvard Univ.,
5.125%, 7/15/37, Ser. FF
Aaa/AAA 7,217,350
4,910 State Housing Finance Agcy., Housing Rev., 5.125%, 6/1/43, Ser. H Aa3/AA− 4,940,098
3,225 State Water Pollution Abatement Trust Rev., 5.00%, 8/1/32, Ser. 8 Aaa/AAA 3,292,532
7,555 State Water Res. Auth. Rev., 5.00%, 8/1/32, Ser. J (FSA) Aaa/AAA 7,693,181
      24,186,021
 

Michigan–6.9%

   
12,240 Detroit Water Supply System, 5.00%, 7/1/34, Ser. B (MBIA) Aaa/AAA 12,376,476
5,000 State Building Auth., Rev., 5.00%, 10/15/26, Ser. III (FSA) Aaa/AAA 5,146,050
  State Hospital Finance Auth. Rev.,    
175 Detroit Medical Center, 5.25%, 8/15/23 Ba3/BB− 159,498
4,000 Henry Ford Health System, 5.00%, 3/1/17,
(Pre-refunded @ $100, 3/1/13) (a)
A1/A 4,193,320
  Oakwood Group, Ser. A,    
5,405 5.75%, 4/1/32 A2/A 5,615,146
575 6.00%, 4/1/22 A2/A 612,226
20,000 Trinity Health Credit, 5.375%, 12/1/30 Aa3/AA− 20,693,400
1,000 State Technical Univ., 5.00%, 10/1/33 (XLCA) Aaa/AAA 1,012,470
        49,808,586
 

Minnesota–0.3%

   
2,400 Upsala Independent School Dist. No. 487, GO, 5.00%, 2/1/28 (FGIC) Aaa/AAA 2,456,544
 

Mississippi–0.6%

   
  Business Finance Corp., Pollution Control Rev.,    
3,000 5.875%, 4/1/22 Ba1/BBB− 3,013,140
1,250 5.90%, 5/1/22 Ba1/BBB− 1,257,400
      4,270,540
 

Missouri–2.9%

   
4,000 Bi-State Dev. Agcy. Rev., Missouri Illinois Met. Dist.,
5.00%, 10/1/32 (FSA)
Aaa/AAA 4,070,160
1,350 St. Louis Cnty. Industrial Dev. Auth., Housing Dev. Rev.,
5.20%, 1/20/36 (GNMA)
NR/AAA 1,363,379
  St. Louis Industrial Dev. Auth. Rev. (GNMA),    
1,500 5.125%, 12/20/29 NR/AAA 1,524,675
1,500 5.125%, 12/20/30 NR/AAA 1,516,380

       




PIMCO Municipal Income Fund III 
Schedule of Investments
June 30, 2006 (unaudited) (continued)


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

Missouri (continued)

   
$  4,365 State Environmental Impt. & Energy Resources Auth., Water Pollution Control Rev., 5.00%, 7/1/23, Ser. B     
Aaa/NR
    
$    4,506,382
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
    
    
8,250,450
      21,231,426
 

Montana–1.6%

   
11,250 Forsyth Pollution Control Rev., Puget Sound Energy,
5.00%, 3/1/31 (AMBAC)
Aaa/AAA 11,471,400
 

Nevada–0.6%

   
3,355 Henderson Health Care Fac. Rev., Catholic Healthcare West,
5.125%, 7/1/28
A3/A− 3,309,271
945 Henderson Local Impt. Dists., Special Assessment, 5.80%, 3/1/23 NR/NR 974,059
      4,283,330
 

New Hampshire–0.7%

   
  Manchester Water Works Rev. (FGIC),    
1,500 5.00%, 12/1/28 Aaa/AAA 1,533,435
3,250 5.00%, 12/1/34 Aaa/AAA 3,300,050
      4,833,485
 

New Jersey–4.6%

   
  Camden Cnty.,    
1,000 Improvement Auth., 5.00%, 2/15/35, Ser. A Baa3/BBB 980,550
1,540 Improvement Auth. Rev., Cooper Health System,
6.00%, 2/15/27, (Pre-refunded @ $102, 2/15/07) (a)
Baa3/BBB 1,590,112
  Economic Dev. Auth.,    
4,500 Kapkowski Rd. Landfill, 6.50%, 4/1/28 Baa3/NR 5,262,615
300 Newark Airport, 7.00%, 10/1/14 Ba3/NR 305,709
  Health Care Facs. Financing Auth. Rev.,    
2,500 Middlesex Cnty. Pollution Control Auth. Rev., 5.75%, 9/15/32 Ba1/BBB− 2,625,725
3,000 Pascack Valley Hospital, 6.625%, 7/1/36 NR/B+ 3,109,320
2,000 Somerset Medical Center, 5.50%, 7/1/33 Baa3/NR 2,013,460
2,000 South Port Corp., Rev., 5.10%, 1/1/33 NR/A 2,031,760
1,500 State Educational Facs. Auth. Rev., 6.00%, 7/1/25, Ser. D NR/NR 1,618,680
  Tobacco Settlement Financing Corp. Rev.,    
525 6.00%, 6/1/37 Baa3/BBB 552,888
1,000 6.125%, 6/1/24 Baa3/BBB 1,070,960
230 6.125%, 6/1/42 Baa3/BBB 243,554
350 6.25%, 6/1/43 Baa3/BBB 379,074
10,750 6.75%, 6/1/39 Baa3/BBB 11,955,397
        33,739,804
 

New Mexico–0.1%

   
1,000 Farmington Pollution Control Rev., 5.80%, 4/1/22 Baa2/BBB 1,011,930

     




PIMCO Municipal Income Fund III 
Schedule of Investments
June 30, 2006 (unaudited) (continued)


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

New York–5.4%

   
$10,000 Metropolitan Transportation Auth. Rev., 5.25%, 11/15/32, Ser. B A2/A $  10,414,000
  New York City Municipal Water Finance Auth., Water & Sewer
System Rev.,
   
5,000 5.00%, 6/15/35, Ser. C Aa2/AA+ 5,075,150
1,500 5.00%, 6/15/39, Ser. A Aa2/AA+ 1,518,585
  State Dormitory Auth. Rev.,    
4,000 Saint Barnabas Hospital, 5.125%, 2/1/22, Ser. A (FHA-AMBAC) Aaa/AAA 4,152,880
11,590 Sloan-Kettering Center Memorial, 5.00%, 7/1/34, Ser. 1 Aa2/AA 11,733,021
3,800 State Personal Income Tax, 5.00%, 3/15/32,
(Pre-refunded @ $100, 3/15/13) (a)
Aa3/AAA 4,018,652
2,000 State Environmental Facs. Corp. Rev., 5.00%, 6/15/28 Aaa/AAA 2,053,000
      38,965,288
 

North Carolina–1.6%

   
2,000 Charlotte-Mecklenburg Hospital Auth., Healthcare System Rev.,
5.00%, 1/15/33, Ser. A
Aa3/AA 2,025,500
  Eastern Municipal Power Agcy., Power System Rev.,    
2,000 5.125%, 1/1/23, Ser. D Baa2/BBB 2,028,060
2,000 5.125%, 1/1/26, Ser. D Baa2/BBB 2,019,200
3,795 5.375%, 1/1/17, Ser. C Baa2/BBB 3,956,136
1,500 Medical Care Commission, Health Care Facs. Rev., Cleveland Cnty.,
5.00%, 7/1/35 (AMBAC)
Aaa/AAA 1,516,725
      11,545,621
 

Ohio–0.3%

   
2,500 Lorain Cnty. Hospital Rev., Catholic Healthcare, 5.375%, 10/1/30 Aa3/AA− 2,565,650
 

Oklahoma–0.5%

   
3,500 Tulsa Cnty. Industrial Auth. Rev., Legacy Apartments, 4.90%, 11/20/46 (FHA-GNMA) Aaa/NR 3,451,280
 

Pennsylvania–3.4%

   
4,350 Allegheny Cnty. Hospital Dev. Auth. Rev., 9.25%, 11/15/30, Ser. B Ba3/B+ 5,155,272
  Cumberland Cnty. Auth. Retirement Community Rev.,
Wesley Affiliated Services,
   
415 7.25%, 1/1/35, Ser. A NR/NR 442,141
1,085 7.25%, 1/1/35, Ser. A, (Pre-refunded @ $101, 1/1/12) (a) NR/NR 1,282,177
3,250 Delaware River Joint Toll Bridge, Commission Bridge Rev.,
5.00%, 7/1/28
A2/A− 3,303,593
3,000 Lehigh Cnty. General Purpose Auth. Rev., St. Luke's Bethlehem
Hospital, 5.375%, 8/15/33
Baa1/BBB 3,068,250
5,000 Philadelphia School Dist., GO, 5.125%, 6/1/34, Ser. D (FGIC) Aaa/AAA 5,148,700
6,300 St. Mary Hospital Auth., Bucks Cnty. Rev., 5.00%, 12/1/28,
(Partially pre-refunded @ $101, 6/1/08) (a)
Aa2/NR 6,077,547
        24,477,680
 

Puerto Rico–0.3%

   
2,200 Electric Power Auth., Power Rev., 5.125%, 7/1/29, Ser. NN A3/BBB+ 2,227,676

       




PIMCO Municipal Income Fund III 
Schedule of Investments
June 30, 2006 (unaudited) (continued)


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

South Carolina–2.0%

   
$  7,500 Florence Cnty. Rev., McLeod Regional Medical Center,
5.00%, 11/1/31, Ser. A (FSA)
    
Aaa/AAA
    
$    7,627,125
  6,700 Jobs Economic Dev. Auth. Rev., Bon Secours Health System,
5.625%, 11/15/30
    
A3/A−
    
6,939,994
      14,567,119
 

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− 1,280,587
 

Texas–10.6%

   
4,135 Canyon Independent School Dist., GO, 5.00%, 2/15/28, Ser. A (PSF-GTD) NR/AAA 4,202,235
2,500 Columbia & Brazoria Independent School Dist., GO,
5.00%, 8/1/29 (PSF-GTD)
NR/AAA 2,541,575
1,300 Comal Cnty. Health Facs., McKenna Memorial Hospital Project Rev.,
6.25%, 2/1/32
Baa3/BBB− 1,389,388
  Denton Independent School Dist., GO (PSF-GTD),    
6,000 zero coupon, 8/15/26 Aaa/AAA 2,009,940
6,000 zero coupon, 8/15/27 Aaa/AAA 1,891,500
5,000 zero coupon, 8/15/28 Aaa/AAA 1,484,000
6,000 zero coupon, 8/15/29 Aaa/AAA 1,677,240
2,000 zero coupon, 8/15/30 Aaa/AAA 526,160
8,000 zero coupon, 8/15/31 Aaa/AAA 1,980,320
4,400 Harris Cnty., GO, 5.125%, 8/15/31, (Pre-refunded @ $100, 8/15/12) (a) Aa1/AA+ 4,638,920
  Harris Cnty. Health Facs. Dev. Corp. Rev.,    
5,000 Christus Health, 5.375%, 7/1/29, Ser. A,
(Pre-refunded @ $101, 7/1/09) (MBIA) (a)
Aaa/AAA 5,251,950
2,750 St. Luke's Episcopal Hospital, 5.375%, 2/15/26,
Ser. A (Pre-refunded @ $100, 8/15/11) (a)
NR/AAA 2,923,030
19,500 Harris Cnty. Rev., 5.125%, 8/15/32 (FSA) Aaa/AAA 19,965,855
4,005 Houston, GO, 5.00%, 3/1/25 (MBIA) Aaa/AAA 4,097,716
5,000 Houston Water & Sewer System Rev., 5.00%, 12/1/30, Ser. A,
(Pre-refunded @ $100, 12/1/12) (FSA)(a)
Aaa/AAA 5,248,100
7,000 Judson Independent School Dist., GO, 5.00%, 2/1/30 (PSF-GTD) Aaa/NR 7,102,480
  Mesquite Independent School Dist. No. 1, GO, Ser. A (PSF-GTD),    
1,365 zero coupon, 8/15/16 NR/AAA 838,438
1,000 zero coupon, 8/15/18 NR/AAA 553,840
1,000 zero coupon, 8/15/19 NR/AAA 524,100
1,000 zero coupon, 8/15/20 NR/AAA 496,150
2,105 Northwest Harris Cnty. Municipal Utility Dist. No. 16, GO,
5.30%, 10/1/29 (Radian)
NR/AA 2,138,301
4,000 State of Texas, GO, 4.75%, 4/1/36 Aa1/AA 3,881,920
2,000 Univ. Rev., 5.00%, 7/1/26, Ser. B Aaa/AAA 2,059,680
        77,422,838
       

    




PIMCO Municipal Income Fund III 
Schedule of Investments
June 30, 2006 (unaudited) (continued)


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

Utah–0.8%

   
$  1,750 Cnty. of Weber, IHC Health Services Rev., 5.00%, 8/15/30 Aa1/AA+ $    1,761,655
4,100 Salt Lake Cnty. Hospital Rev., IHC Health Services,
5.125%, 2/15/33 (AMBAC)
    
Aaa/AAA

4,176,752
      5,938,407
 

Washington–4.8%

   
6,375 Chelan Cnty. Public Utility Dist. Rev.,
5.125%, 7/1/33, Ser. C (AMBAC)
Aaa/AAA 6,504,922
3,000 Port Seattle Rev., 5.00%, 9/1/24 (FGIC) Aaa/AAA 3,076,410
23,230 Tobacco Settlement Auth., Tobacco Settlement Rev., 6.50%, 6/1/26 Baa3/BBB 25,283,997
      34,865,329
 

Wisconsin–0.1%

   
560 Badger Tobacco Asset Securitization Corp., 6.00%, 6/1/17 Baa3/BBB 591,214
  Total Municipal Bonds & Notes (cost–$624,683,997)   655,888,782

VARIABLE RATE NOTES (b)(d)(e)–8.7%

 

Arizona–0.2%

   
1,000 Salt River Project Agricultural Improvement & Power Dist., Rev., 8.11%, 1/1/35, Ser. 1227 Aa1/NR 1,117,550
 

Colorado–0.4%

   
2,490 City of Colorado Springs, 7.576%, 11/15/30, Ser. 457 Aa2/NR 2,668,383
 

Florida–0.3%

   
2,554 State Department of Transportation Turnpike Rev.,
6.84%, 7/1/31, Ser. 1128
Aa2/NR 2,279,573
 

Illinois–0.3%

   
1,990 Dev. Finance Auth., Gas Supply Rev., 9.325%, 2/1/11 (AMBAC) NR/NR 2,096,465
 

Michigan–1.6%

   
  Detroit Water Supply System Rev.,    
5,720 9.127%, 1/1/11 (MBIA) NR/AAA 6,276,499
4,990 9.533%, 7/1/11 (FSA) NR/AAA 5,436,705
      11,713,204
 

New York–2.4%

   
7,770 Liberty Dev. Corp. Rev., 7.32%, 10/1/35, Ser. 1183 Aa3/NR 9,292,221
1,636 New York City Municipal Water Finance Auth., Water & Sewer System Rev., 8.19%, 6/15/37, Ser. 1226 Aa2/NR 1,759,518
6,000 State Dormitory Auth., Univ. & College Improvement Rev.,
8.19%, 3/15/35, Ser. 1216
NR/AAA 6,612,600
      17,664,339

       




PIMCO Municipal Income Fund III 
Schedule of Investments
June 30, 2006 (unaudited) (continued)


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

Ohio–0.4%

   
  Ohio Air Quality Dev. Auth. (FGIC),    
$  1,000 7.11%, 1/1/34, Ser. 1219 Aaa/AAA $       866,000
2,075 7.11%, 1/1/34, Ser. 1223 Aaa/AAA 1,797,282
      2,663,282
 

Texas–1.7%

   
1,705 Crowley Independent School Dist., GO,
6.31%, 8/1/35, Ser. 1171 (PSF-GTD)
Aaa/NR 1,469,539
2,450 Dallas Area Rapid Transit Rev., 8.420%, 12/1/32 (FGIC) NR/NR 2,605,306
2,028 Denton Independent School Dist., GO,
8.08%, 8/15/33, Ser. 951 (PSF-GTD)
Aaa/NR 2,170,418
1,870 Mansfield Independent School Dist., GO, 9.294%, 2/15/28 (PSF-GTD) NR/NR 2,064,312
2,000 Sabine River Auth. Rev., 5.20%, 5/1/28 Baa2/BBB− 2,032,340
2,060 Univ. Rev., 8.586%, 8/15/33 NR/NR 2,232,175
      12,574,090
 

Washington–1.4%

   
  King Cnty. Sewer Rev.,    
3,000 8.11%, 1/1/35, Ser. 1200 (FSA) Aaa/AAA 3,135,900
1,520 9.444%, 7/1/11 (FGIC) NR/NR 1,631,507
3,655 Port Tacoma, GO, 8.915%, 12/1/33 (AMBAC) NR/NR 3,934,169
  1,510 Seattle Drain & Wastewater Rev., 9.479%, 7/1/10 (FGIC) NR/NR 1,623,295
      10,324,871
  Total Variable Rate Notes (cost–$65,344,677)   63,101,757

VARIABLE RATE DEMAND NOTES (e)(f)–0.7%

 

California–0.4%

   
200 City & Cnty. of San Francisco, GO, 3.90%, 7/6/06, Ser. D (MBIA) VMIG1/A−1+ 200,000
2,500 State of California, Daily Kindergarten Univ., GO, 3.97%, 7/3/06 VMIG1/A−1+ 2,500,000
      2,700,000
 

Kentucky–0.2%

   
1,395 Shelby Cnty. Lease Rev., 4.03%, 7/3/06, Ser. A Aa1/NR 1,395,000
 

New York–0.1%

   
1,150 New York City Transitional Finance Auth. Rev., 3.95%, 7/3/06 VMIG1/A−1+ 1,150,000
 

North Carolina–0.0%

   
100 City of Raleigh, CP, 3.96%, 7/5/06, Ser. B VMIG1/A−1+ 100,000
  Total Variable Rate Demand Notes (cost–$5,344,994) 5,345,000

U.S. TREASURY BILLS (h)–0.4%

2,740 4.70%-4.81%, 8/31/06-9/14/06 (cost–$2,713,324)   2,713,324
  Total Investments before options written (cost–$698,086,992)–100.0% 727,048,863

     




PIMCO Municipal Income Fund III 
Schedule of Investments
June 30, 2006 (unaudited) (continued)


Principal Amount (000)          Value*

OPTIONS WRITTEN (g)–(0.0)%

Contracts      
 

Call Options–(0.0)%

 
  U.S. Treasury Notes 10 yr. Futures, Chicago Board of Trade,  
484 strike price $108, expires 8/25/06   (15,125)
 

Put Options–(0.0)%

 
  U.S. Treasury Notes 10 yr. Futures, Chicago Board of Trade,  
484 strike price $103, expires 8/25/06 (68,063)
  Total Options Written (premiums received–$132,979) (83,188)
  Total Investments net of options written (cost–$697,954,013)–100.0% $726,965,675

         




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 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 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.
(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) and/or whose interest rates vary with changes in a designated base rate (such as the prime interest rate).
(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 June 30, 2006.
(d)  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.
(e)  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 June 30, 2006.
(f)  Maturity date shown is date of next put.
(g)  Non-income producing.
(h)  All or partial amount segregated as collateral for futures contracts and transactions in options written.

Glossary:

AMBAC – insured by American Municipal Bond Assurance Corp.

CP – Certificates of Participation

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 June 30, 2006:

Type Notional
Amount
(000)
Expiration
Date
Unrealized
Appreciation
(Depreciation)
Long:   Financial Future Euro – 90 day $143
6/18/07
$(84,175
)
Financial Future Euro – 90 day 143
9/17/07
(80,400
)
Financial Future Euro – 90 day 143
12/17/07
(78,975
)
Financial Future Euro – 90 day 143
3/17/08
(76,838
)
U.S. Treasury Notes 5 yr. Futures 992
9/29/06
(594,625
)
U.S. Treasury Notes 10 yr. Futures 68
9/20/06
(43,562
)
Short:   U.S. Treasury Bond Futures (2,321
)
9/20/06
1,317,570
   
 
$358,995

(2) Transactions in options written for the nine months ended June 30, 2006:


  Contracts Premiums
Options outstanding, September 30, 2005 2,494
$ 682,598
Options written 3,433
862,146
Options terminated in closing transactions (956
)
(276,276
)
Options expired (4,003
)
(1,135,489
)
Options outstanding, June 30, 2006 968
$ 132,979



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: August 17, 2006

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

Date: August 17, 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: August 17, 2006

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

Date: August 17, 2006