The Mexican state o Sonorais dividit intae 72 municipalities:
| INEGI code | Municipality | Municipal Seat | Population (2005)[1] |
|---|
| 001 | Aconchi | Aconchi | 2,452 |
| 002 | Agua Prieta | Agua Prieta | 70,303 |
| 003 | Álamos | Álamos | 24,493 |
| 004 | Altar | Altar | 8,357 |
| 005 | Arivechi | Arivechi | 1,280 |
| 006 | Arizpe | Arizpe | 2,959 |
| 007 | Atil | Atil | 734 |
| 008 | Bacadéhuachi | Bacadéhuachi | 1,264 |
| 009 | Bacanora | Bacanora | 767 |
| 010 | Bacerac | Bacerac | 1,346 |
| 011 | Bacoachi | Bacoachi | 1,456 |
| 012 | Bácum | Bácum | 20,892 |
| 013 | Banámichi | Banámichi | 1,464 |
| 014 | Baviácora | Baviácora | 3,404 |
| 015 | Bavispe | Bavispe | 1,263 |
| 016 | Benito Juárez | Villa Juárez | 20,447 |
| 017 | Benjamín Hill | Benjamín Hill | 5,285 |
| 018 | Caborca | Heroica Caborca | 70,113 |
| 019 | Cajeme | Ciudad Obregón | 375,800 |
| 020 | Cananea | Cananea | 32,157 |
| 021 | Carbó | Carbó | 4,644 |
| 022 | Cucurpe | Cucurpe | 798 |
| 023 | Cumpas | Cumpas | 5,776 |
| 024 | Divisaderos | Divisaderos | 681 |
| 025 | Empalme | Empalme | 50,663 |
| 026 | Etchojoa | Etchojoa | 55,697 |
| 027 | Fronteras | Fronteras | 7,470 |
| 028 | Granados | Granados | 938 |
| 029 | Guaymas | Guaymas | 134,153 |
| 030 | Hermosillo | Hermosillo | 701,838 |
| 031 | Huachinera | Huachinera | 1,223 |
| 032 | Huásabas | Huásabas | 865 |
| 033 | Huatabampo | Huatabampo | 74,533 |
| 034 | Huépac | Huépac | 1,032 |
| 035 | Imuris | Imuris | 10,541 |
| 036 | La Colorada | La Colorada | 1,754 |
| 037 | Magdalena de Kino | Magdalena de Kino | 25,500 |
| 038 | Mazatán | Mazatán | 1,363 |
| 039 | Moctezuma | Moctezuma | 4,322 |
| 040 | Naco | Naco | 6,010 |
| 041 | Nácori Chico | Nácori Chico | 1,743 |
| 042 | Nacozari de García | Nacozari de García | 11,961 |
| 043 | Navojoa | Navojoa | 144,598 |
| 044 | Nogales | Nogales | 193,517 |
| 045 | Onavas | Onavas | 392 |
| 046 | Opodepe | Opodepe | 2,634 |
| 047 | Oquitoa | Oquitoa | 409 |
| 048 | Pitiquito | Pitiquito | 9,117 |
| 049 | Puerto Peñasco | Puerto Peñasco | 44,875 |
| 050 | Plutarco Elías Calles | Sonoyta | 12,416 |
| 051 | Quiriego | Quiriego | 3,049 |
| 052 | Rayón | Rayón | 1,543 |
| 053 | Rosario de Tesopaco | Rosario de Tesopaco | 5,165 |
| 054 | Sahuaripa | Sahuaripa | 5,792 |
| 055 | San Felipe de Jesús | San Felipe de Jesús | 312 |
| 056 | San Ignacio Río Muerto | San Ignacio Río Muerto | 13,244 |
| 057 | San Javier | San Javier | 242 |
| 058 | San Luis Río Colorado | San Luis Río Colorado | 157,076 |
| 059 | San Miguel de Horcasitas | San Miguel de Horcasitas | 6,036 |
| 060 | San Pedro de la Cueva | San Pedro de la Cueva | 1,429 |
| 061 | Santa Ana | Santa Ana | 14,638 |
| 062 | Santa Cruz | Santa Cruz | 1,786 |
| 063 | Sáric | Sáric | 2,486 |
| 064 | Soyopa | Soyopa | 1,209 |
| 065 | Suaqui Grande | Suaqui Grande | 1,102 |
| 066 | Tepache | Tepache | 1,184 |
| 067 | Trincheras | Trincheras | 1,670 |
| 068 | Tubutama | Tubutama | 1,751 |
| 069 | Ures | Ures | 8,420 |
| 070 | Villa Hidalgo | Villa Hidalgo | 1,565 |
| 071 | Villa Pesqueira | Villa Pesqueira | 1,374 |
| 072 | Yécora | Yécora | 6,089 |
