| Fire department | City | County | Career firefighters | Website |
|---|---|---|---|---|
| Boise City Fire Department | Boise | Ada | 246 | Official site |
| Idaho Falls Fire Department | Idaho Falls | Bonneville | 130 | — |
| Nampa Fire Department | Nampa | Canyon | 90 | Official site |
| Pocatello Fire Department | Pocatello | Bannock | 80 | Official site |
| Mountain Home AFB Fire Department | Mountain Home Afb | Elmore | 78 | — |
| Meridian Fire Department | Meridian | Ada | 69 | Official site |
| Kootenai County Fire and Rescue | Post Falls | Kootenai | 65 | Official site |
| Coeur d'Alene Fire Department | Coeur D'Alene | Kootenai | 58 | Official site |
| Lewiston Fire Department | Lewiston | Nez Perce | 48 | Official site |
| Twin Falls Fire Department | Twin Falls | Twin Falls | 45 | Official site |
| Eagle Fire Protection District | Eagle | Idaho | 42 | Official site |
| Northern Lakes Fire Protection District | Hayden | Kootenai | 41 | Official site |
| Caldwell Fire Department | Caldwell | Canyon | 39 | — |
| Teton County Fire Protection District | Driggs | Teton | 25 | Official site |
| Blackfoot Fire Department | Blackfoot | Bingham | 23 | — |
| North Ada County Fire & Rescue District | Garden City | Ada | 22 | Official site |
| Madison Fire Department | Rexburg | Madison | 21 | Official site |
| Clearwater Potlatch Fire Protection District | Orofino | Clearwater | 18 | Official site |
| Salmon Tract Rural Fire Protection District | Twin Falls | Twin Falls | 18 | — |
| Fort Hall Fire & EMS District | Fort Hall | Bingham | 16 | — |
| Jerome City Fire Department | Jerome | Jerome | 16 | Official site |
| McCall Fire Protection District | Mccall | Valley | 14 | Official site |
| Chubbuck Fire Department | Chubbuck | Bannock | 13 | — |
| Ketchum Fire Department | Ketchum | Blaine | 13 | Official site |
| Sagle Fire District | Sandpoint | Bonner | 13 | Official site |
| Star Fire Protection District | Star | Ada | 13 | Official site |
| Shoshone County Fire Protection District #2 | Kellogg | Shoshone | 11 | Official site |
| City of Burley Fire Department | Burley | Cassia | 10 | — |
| Sandpoint Fire Department | Sandpoint | Bonner | 10 | Official site |
| Kuna Rural Fire District | Kuna | Ada | 9 | Official site |
| Spirit Lake Fire Protection District | Spirit Lake | Kootenai | 9 | Official site |
| Worley Fire Protection District | Worley | Kootenai | 9 | Official site |
| Cascade Rural Fire Protection District | Cascade | Valley | 8 | — |
| Donnelly Rural Fire Protection District | Donnelly | Valley | 8 | Official site |
| Buhl Fire Department | Buhl | Twin Falls | 7 | — |
| Shoshone County Fire Protection District #1 | Osburn | Shoshone | 7 | — |
| Timberlake Fire Protection District | Athol | Kootenai | 7 | Official site |
| Wilder Rural Fire Protection District | Wilder | Canyon | 6 | Official site |
| Ammon Fire Department | Ammon | Bonneville | 5 | Official site |
| Payette City Fire Departmemt | Payette | Payette | 5 | Official site |
| Hailey Fire Department | Hailey | Blaine | 4 | Official site |
| Moscow Fire Department | Moscow | Latah | 4 | Official site |
| Westside Fire District | Sandpoint | Bonner | 4 | Official site |
| Middleton Rural Fire District | Middleton | Canyon | 3 | — |
| Sun Valley Fire Department | Sun Valley | Blaine | 3 | Official site |
| Central Fire District | Rigby | Jefferson | 2 | Official site |
| Garden Valley Fire Protection District | Garden Valley | Boise | 2 | — |
| Gem County Fire Protection District #1 | Emmett | Gem | 2 | — |
| Hagerman Fire Protection District | Hagerman | Gooding | 2 | — |
| Mica Kidd Island Fire Protection District | Coeur D' Alene | Kootenai | 2 | Official site |
| Mountain Home City Fire Department | Mountain Home | Elmore | 2 | Official site |
| North of the Narrows Fire District | Coolin | Bonner | 2 | — |
| Northside Fire District | Ponderay | Bonner | 2 | — |
| Rock Creek Rural Fire Protection District | Kimberly | Twin Falls | 2 | Official site |
| Sam Owen Fire District | Hope | Bonner | 2 | Official site |
| Schweitzer Fire/Rescue District | Sandpoint | Bonner | 2 | — |
| Weiser City Fire & Rescue | Weiser | Washington | 2 | — |
| Wendell City Fire Department | Wendell | Gooding | 2 | Official site |
| Wendell Rural Fire District | Wendell | Idaho | 2 | — |
| Atlanta Rural Fire Protection District | Atlanta | Elmore | 1 | — |
| Bellevue Fire Department | Bellevue | Blaine | 1 | Official site |
| Bliss Fire District | Bliss | Gooding | 1 | — |
| Bonners Ferry Fire Department | Bonners Ferry | Boundary | 1 | Official site |
| Emmett Fire Department | Emmett | Gem | 1 | — |
| First Segregation Fire District | Eden | Jerome | 1 | — |
| Franklin County Fire Protection District | Preston | Franklin | 1 | — |
| Gateway Fire Protection District | Plummer | Benewah | 1 | — |
| Gooding City Rural Fire Department | Gooding | Gooding | 1 | — |
| Grand View Rural Fire Protection District | Grand View | Owyhee | 1 | — |
| Greater Swan Valley Fire Protection District #2 | Swan Valley | Bonneville | 1 | — |
| Hauser Lake Fire Protection District | Hauser | Kootenai | 1 | Official site |
| Minidoka County Fire Protection District | Heyburn | Minidoka | 1 | — |
| North Bannock Fire District | Chubbuck | Bannock | 1 | Official site |
| Paradise Valley Fire District | Bonners Ferry | Boundary | 1 | — |
| Parma Rural Fire Protection District | Parma | Canyon | 1 | Official site |
| Rupert City Fire/ Rescue | Rupert | Minidoka | 1 | — |
| Saint Maries Fire Protection District | Saint Maries | Benewah | 1 | — |
| South Boundary Fire Protection District | Naples | Boundary | 1 | Official site |
| Weiser Area Rural Fire District | Weiser | Washington | 1 | — |
| West End Fire Protection District | Paul | Minidoka | 1 | — |
| West Pend Oreille Fire District | Priest River | Bonner | 1 | — |
Largest first by career firefighters, as each employer reports it to its federal registry.
Source: U.S. Fire Administration (FEMA), National Fire Department Registry. Data captured September 30, 2026.