| Fire department | City | County | Career firefighters | Website |
|---|---|---|---|---|
| Denver Fire Department | Denver | Denver | 914 | Official site |
| South Metro Fire Rescue Authority | Centennial | Arapahoe | 560 | Official site |
| Colorado Springs Fire Department | Colorado Springs | El Paso | 427 | Official site |
| Aurora Fire Department | Aurora | Arapahoe | 349 | Official site |
| West Metro Fire Rescue | Lakewood | Jefferson | 340 | Official site |
| Poudre Fire Authority | Fort Collins | Larimer | 176 | Official site |
| Colorado Division of Fire Prevention & Control | Lakewood | Denver | 160 | Official site |
| Arvada Fire Protection District | Arvada | Jefferson | 141 | Official site |
| Pueblo Fire Department | Pueblo | Pueblo | 140 | Official site |
| Westminster Fire Department | Westminster | Adams | 140 | Official site |
| Thornton Fire Department | Thornton | Adams | 130 | Official site |
| City of Grand Junction Fire Department | Grand Junction | Mesa | 125 | Official site |
| Greeley Fire Department | Greeley | Weld | 120 | Official site |
| North Metro Fire Rescue District | Broomfield | Adams | 117 | Official site |
| Loveland Fire Rescue Authority | Loveland | Larimer | 110 | Official site |
| City of Boulder Fire Department | Boulder | Boulder | 107 | Official site |
| Adams County Fire Protection District | Denver | Adams | 104 | Official site |
| Castle Rock Fire & Rescue Department | Castle Rock | Douglas | 91 | Official site |
| Mountain View Fire Protection District | Longmont | Weld | 90 | Official site |
| Longmont Fire Department | Longmont | Boulder | 81 | — |
| USAF Academy Fire & Emergency Services | Usaf Academy | El Paso | 80 | Official site |
| Frederick-Firestone Fire Protection District | Frederick | Weld | 75 | Official site |
| Fountain Fire Department | Fountain | El Paso | 70 | Official site |
| Peterson Air Force Base Fire Department | Peterson Afb | El Paso | 65 | — |
| Eagle River Fire Protection District | Edwards | Eagle | 64 | Official site |
| Durango Fire Protection District | Durango | La Plata | 63 | Official site |
| Greater Brighton Fire Protection District | Brighton | Adams | 53 | Official site |
| Red White & Blue Fire District | Breckenridge | Summit | 52 | Official site |
| Monument Fire District | Monument | El Paso | 50 | Official site |
| Buckley Air Force Base Fire Department | Buckley Afb | Adams | 49 | — |
| South Adams County Fire Protection District #4 | Commerce City | Adams | 47 | Official site |
| Buckley Fire and Emergency Services | Aurora | Arapahoe | 44 | — |
| Colorado River Fire Rescue | Rifle | Garfield | 44 | Official site |
| Windsor-Severance Fire Protection District | Windsor | Weld | 44 | Official site |
| Lake Dillon Fire Protection District | Silverthorne | Summit | 41 | Official site |
| Platteville-Gilcrest Fire Protection District | Platteville | Weld | 41 | Official site |
| Schriever AFB Fire Department | Schriever Afb | El Paso | 41 | — |
| Security Fire Department | Security | El Paso | 39 | Official site |
| Montrose Fire Protection District | Montrose | Montrose | 36 | Official site |
| Snowmass Wildcat Fire Protection District | Snowmass Village | Pitkin | 35 | — |
| Vail Fire & Emergency Services | Vail | Eagle | 35 | Official site |
| Hanging Lake Tunnel | Glenwood Springs | Garfield | 33 | — |
| Upper Pine River Fire Protection District | Bayfield | La Plata | 33 | Official site |
| Canon City Area Fire Protection District | Canon City | Fremont | 32 | Official site |
| Lafayette Fire Department | Lafayette | Boulder | 30 | Official site |
| Fort Lupton Fire Protection District | Fort Lupton | Weld | 29 | Official site |
| Pueblo Rural Fire District | Pueblo | Pueblo | 29 | Official site |
| City of Steamboat Springs | Steamboat Springs | Routt | 28 | Official site |
| Louisville Fire Department | Louisville | Boulder | 28 | Official site |
| Fairmount Fire Protection District | Golden | Jefferson | 27 | Official site |
| Cripple Creek Fire & Emergency Services | Cripple Creek | Teller | 25 | — |
| Platte Valley Fire Protection District | Kersey | Weld | 25 | Official site |
| Falcon Fire Protection District | Falcon | El Paso | 24 | — |
| Glenwood Springs Fire Department | Glenwood Springs | Garfield | 24 | Official site |
| Hudson Fire Protection District | Hudson | Weld | 24 | — |
| Black Forest Fire Rescue Protection District | Colorado Springs | El Paso | 22 | Official site |
| Black Hawk Fire Department | Black Hawk | Gilpin | 22 | Official site |
| Cheyenne Mountain A.F.S. Fire Department | Colorado Springs | El Paso | 22 | — |
| Donald Wescott Fire Protection District | Colorado Springs | El Paso | 22 | Official site |
| Southeast Weld Fire Protection District | Keenesburg | Weld | 22 | Official site |
| Sterling Fire Department | Sterling | Logan | 22 | Official site |
| Berthoud Fire Protection District | Berthoud | Larimer | 21 | Official site |
| Franktown Fire Protection District | Franktown | Douglas | 21 | Official site |
| Pleasant View Fire Department | Pleasant View | Montezuma | 21 | — |
| Pueblo West Fire Department | Pueblo West | Pueblo | 21 | Official site |
| Elizabeth Fire Protection District | Elizabeth | Elbert | 20 | Official site |
| Larkspur Fire Protection District | Larkspur | Douglas | 20 | Official site |
| Boulder Rural Fire Protection District | Boulder | Boulder | 19 | — |
| Clifton Fire Protection District | Clifton | Mesa | 19 | Official site |
| Cortez Fire Protection District | Cortez | Montezuma | 19 | Official site |
| Los Pinos Fire Protection District | Ignacio | La Plata | 19 | Official site |
| Bennett Fire Protection District | Bennett | Adams | 18 | Official site |
| Cimarron Hills Fire Department | Colorado Springs | El Paso | 18 | Official site |
| Evans Fire Protection District | Evans | Weld | 18 | Official site |
| Greater Eagle Fire Protection District | Eagle | Eagle | 18 | Official site |
| Federal Heights Fire Department | Federal Heights | Adams | 17 | Official site |
| Lower Valley Fire Protection District | Fruita | Mesa | 17 | Official site |
| Platte Canyon Fire Protection District | Bailey | Park | 17 | Official site |
| Jackson 105 Fire Department | Sedalia | Douglas | 16 | Official site |
| Pagosa Fire Protection District | Pagosa Springs | Archuleta | 16 | Official site |
| Trinidad Fire Department | Trinidad | Las Animas | 16 | — |
| Grand Valley Fire Protection District | Parachute | Garfield | 15 | Official site |
| Pueblo Chemical Depot | Pueblo | Pueblo | 15 | — |
| Sheridan Fire Department | Sheridan | Arapahoe | 15 | Official site |
| Snake River Fire Protection District | Keystone | Summit | 15 | Official site |
| Transportation Technology Center Emergency Services | Pueblo | Pueblo | 15 | Official site |
| Copper Mountain Fire Department | Frisco | Summit | 14 | Official site |
| Eaton Fire Protection District | Eaton | Weld | 14 | Official site |
| Northeast Teller County Fire Protection District | Woodland Park | Teller | 14 | Official site |
| Salida Fire Department | Salida | Chaffee | 14 | Official site |
| Carbondale & Rural Fire Protection District | Carbondale | Garfield | 13 | Official site |
| Golden Fire Department | Golden | Jefferson | 13 | Official site |
| La Junta Fire Department/La Junta Rural Fire Protection District | La Junta | Otero | 13 | Official site |
| Mesa Verde National Park Fire Department | Mesa Verde National Park | Montezuma | 12 | Official site |
| Ute Mountain Ute Fire Department | Towaoc | Montezuma | 11 | — |
| Eagle County Regional Airport Fire Department - ARFF | Gypsum | Eagle | 10 | Official site |
| Leadville Lake County Fire Rescue | Leadville | Lake | 10 | Official site |
| Southwestern Highway 115 Fire Protection District | Colorado Springs | El Paso | 10 | — |
| Gunnison - Crested Butte Regional Airport ARFF | Gunnison | Gunnison | 9 | — |
| Lamar Fire Department | Lamar | Prowers | 9 | Official site |
| Elk Creek Fire Protection District | Conifer | Jefferson | 8 | Official site |
| Gypsum Fire Protection District | Gypsum | Eagle | 8 | Official site |
| Ault Pierce Fire Department | Ault | Weld | 7 | Official site |
| De Beque Fire Protection District | De Beque | Mesa | 7 | Official site |
| Jefferson-Como Fire Protection District | Jefferson | Park | 7 | Official site |
| Lyons Fire Protection District | Lyons | Boulder | 7 | Official site |
| Pleasant View Fire Department | Golden | Jefferson | 7 | Official site |
| Rye Fire Protection District | Colorado City | Pueblo | 7 | Official site |
| Sable Altura Fire Rescue | Aurora | Arapahoe | 7 | Official site |
| Stratmoor Hills Fire Protection District | Colorado Springs | El Paso | 7 | — |
| East Grand Fire Protection District #4 | Fraser | Grand | 6 | Official site |
| Manitou Springs Fire Department | Manitou Springs | El Paso | 6 | Official site |
| Plateau Valley Fire Protection District | Mesa | Mesa | 6 | Official site |
| Basalt Rural Fire Protection District | Carbondale | Eagle | 5 | Official site |
| Buena Vista Fire Department | Buena Vista | Chaffee | 5 | — |
| Divide Fire Protection District | Divide | Teller | 5 | — |
| El Paso County Sheriff's Office, Wildland Fire Division | Colorado Springs | El Paso | 5 | Official site |
| Foothills Fire Protection District | Evergreen | Jefferson | 5 | Official site |
| Grand Lake Fire Department Protection | Grand Lake | Grand | 5 | — |
| Montrose Airport Fire Department | Montrose | Montrose | 5 | — |
| Rocky Ford Fire Department | Rocky Ford | Otero | 5 | Official site |
| Timberline Fire Protection District | Black Hawk | Gilpin | 5 | Official site |
| West Routt Fire District | Hayden | Routt | 5 | — |
| Yampa Valley Regional Airport | Hayden | Routt | 5 | — |
| Crested Butte Fire Protection District | Crested Butte | Gunnison | 4 | Official site |
| Estes Valley Fire Protection District | Estes Park | Larimer | 4 | Official site |
| Florence Fire Protection District | Florence | Fremont | 4 | Official site |
| Grand Fire Protection District No. 1 | Granby | Grand | 4 | Official site |
| Johnstown Fire Protection District | Johnstown | Weld | 4 | Official site |
| Milliken Fire Department | Milliken | Weld | 4 | — |
| Oak Creek Fire Protection District | Oak Creek | Routt | 4 | Official site |
| South Fork Fire Protection District | South Fork | Rio Grande | 4 | Official site |
| Aspen Fire Protection District | Aspen | Pitkin | 3 | Official site |
| Chaffee County Fire Protection District | Buena Vista | Chaffee | 3 | Official site |
| Lefthand Fire Protection District | Boulder | Boulder | 3 | Official site |
| Nederland Fire Protection District | Nederland | Boulder | 3 | Official site |
| Skyline Fire Department | Denver | Arapahoe | 3 | Official site |
| Telluride Fire Protection District | Telluride | San Miguel | 3 | Official site |
| Baca Grande Volunteer Fire Department | Crestone | Saguache | 2 | Official site |
| Beulah Fire Protection & Ambulance District | Beulah | Pueblo | 2 | Official site |
| Boulder Mountain Fire Protection District | Boulder | Boulder | 2 | Official site |
| Central City Fire Department | Central City | Gilpin | 2 | Official site |
| Clear Creek Fire Authority | Dumont | Clear Creek | 2 | Official site |
| Ellicott Fire Protection District | Calhan | El Paso | 2 | — |
| Fort Lewis Mesa Fire Protection District | Hesperus | La Plata | 2 | Official site |
| Genesee Fire Rescue | Golden | Jefferson | 2 | Official site |
| Gunnison Fire Department | Gunnison | Gunnison | 2 | Official site |
| Hartsel Fire Protection District | Hartsel | Park | 2 | Official site |
| Kiowa Fire Protection District | Kiowa | Elbert | 2 | Official site |
| North Routt Fire Protection District | Clark | Routt | 2 | Official site |
| North-West Fire Protection District | Fairplay | Park | 2 | — |
| Norwood Fire Protection District | Norwood | San Miguel | 2 | Official site |
| Palisade Fire Department | Palisade | Mesa | 2 | — |
| Rattlesnake Fire Protection District | Parker | Elbert | 2 | Official site |
| Alamosa Fire Department | Alamosa | Alamosa | 1 | — |
| Big Sandy Fire Protection District | Simla | Elbert | 1 | Official site |
| Coal Creek Canyon Fire Protection District | Golden | Jefferson | 1 | Official site |
| Four Mile Fire Protection District | Florissant | Teller | 1 | — |
| Green Mountain Falls/Chipita Park Fire Department | Green Mountain Falls | El Paso | 1 | Official site |
| Indian Hills Fire Protection District | Indian Hills | Jefferson | 1 | Official site |
| Kremmling Fire Department | Kremmling | Grand | 1 | Official site |
| Lake George Fire Protection District | Lake George | Park | 1 | Official site |
| LaSalle Fire Protection District | Lasalle | Weld | 1 | — |
| Log Hill Volunteer Fire Department | Ridgway | Montrose | 1 | — |
| North Fork Volunteer Fire Department | Buffalo Creek | Jefferson | 1 | Official site |
| Peyton Fire Protection District | Peyton | El Paso | 1 | Official site |
| Prowers County Rural Fire Department | Lamar | Prowers | 1 | Official site |
| Victor City Volunteer Fire Department | Victor | Teller | 1 | — |
| West Douglas County Fire Protection District | Sedalia | Douglas | 1 | Official site |
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.