| Public library | City | County | Librarians (FTE) |
|---|---|---|---|
| Denver Public Library | Denver | Denver | 113 |
| High Plains Library District | Greeley | Weld | 110 |
| Douglas County Libraries | Castle Rock | Douglas | 54 |
| Arapahoe Library District | Englewood | Arapahoe | 43.75 |
| Rangeview Library District | Thornton | Adams | 40 |
| Jefferson County Public Library | Lakewood | Jefferson | 36.5 |
| Boulder Public Library District | Boulder | Boulder | 32 |
| Pueblo City-County Library District | Pueblo | Pueblo | 32 |
| Loveland Public Library | Loveland | Larimer | 26.88 |
| Garfield County Public Library District | Rifle | Garfield | 21 |
| Pikes Peak Library District | Colorado Springs | El Paso | 19 |
| Montrose Regional Library District | Montrose | Montrose | 18.1 |
| Aurora Public Library | Aurora | Arapahoe | 18 |
| Pitkin County Library | Aspen | Pitkin | 17.7 |
| Mesa County Public Library District | Grand Junction | Mesa | 17 |
| Southern Chaffee County Regional Lib Dist/Salida | Salida | Chaffee | 16 |
| Summit County Library | Frisco | Summit | 15.95 |
| Westminster Public Library | Westminster | Adams | 15.1 |
| Broomfield/Eisenhower Public Library | Broomfield | Broomfield | 15 |
| Eagle Valley Library District | Eagle | Eagle | 15 |
| Poudre River Public Library District | Fort Collins | Larimer | 14 |
| Grand County Library District | Granby | Grand | 12 |
| Longmont Public Library | Longmont | Boulder | 12 |
| Security Public Library | Security | El Paso | 12 |
| Littleton/Bemis Public Library | Littleton | Arapahoe | 11.5 |
| Estes Valley Public Library District | Estes Park | Larimer | 9.1 |
| Clearview Library District | Windsor | Weld | 9 |
| Englewood Public Library | Englewood | Arapahoe | 8 |
| Lake County Public Library | Leadville | Lake | 8 |
| Louisville Public Library | Louisville | Boulder | 8 |
| Rio Grande County Library District | Monte Vista | Rio Grande | 8 |
| Lafayette Public Library | Lafayette | Boulder | 7.75 |
| Clear Creek County Library District | Georgetown | Clear Creek | 7.4 |
| Durango Public Library | Durango | La Plata | 7 |
| Elbert County Library District | Elizabeth | Elbert | 6.8 |
| East Routt Library District | Steamboat Springs | Routt | 6 |
| Pine River Public Library District/Bayfield | Bayfield | La Plata | 5.75 |
| Basalt Regional Library District | Basalt | Eagle | 5 |
| East Morgan County Library District/Brush | Brush | Morgan | 5 |
| Fort Morgan Public Library | Fort Morgan | Morgan | 5 |
| San Miguel Library District # 1 (Telluride) | Telluride | San Miguel | 5 |
| Sterling Public Library | Sterling | Logan | 5 |
| Delta County Public Library District | Hotchkiss | Delta | 4.6 |
| Upper San Juan Library District | Pagosa Springs | Archuleta | 4.5 |
| Rampart Regional Library District | Woodland Park | Teller | 4 |
| Red Feather Mountain Library District | Red Feather Lakes | Larimer | 3.8 |
| Park County Public Library | Fairplay | Park | 3.75 |
| Wellington Public Library | Wellington | Larimer | 3.75 |
| John C. Fremont Library District (Florence) | Florence | Fremont | 3.7 |
| Gilpin County Library District | Black Hawk | Gilpin | 3.68 |
| Rocky Ford Public Library | Rocky Ford | Otero | 3.65 |
| Wray Public Library | Wray | Yuma | 3.5 |
| Mancos Library District | Mancos | Montezuma | 3.45 |
| La Veta Regional Library District | La Veta | Huerfano | 3.4 |
| Trinidad Carnegie Public Library | Trinidad | Las Animas | 3.2 |
| Alamosa Public Library | Alamosa | Alamosa | 3 |
| Baca County Library | Springfield | Baca | 3 |
| Canon City Public Library | Canon City | Fremont | 3 |
| Northern Chaffee County Library District (Buena Vista) | Buena Vista | Chaffee | 3 |
| Ridgway Public Library District | Ridgway | Ouray | 3 |
| Spanish Peaks Library District | Walsenburg | Huerfano | 3 |
| Lyons Regional Library District | Lyons | Boulder | 2.87 |
| Southern Teller County School/Public Lib Dist | Cripple Creek | Teller | 2.8 |
| Yuma Public Library | Yuma | Yuma | 2.75 |
| Northern Saguache County Library District | Saguache | Saguache | 2.5 |
| Rangely Regional Library District | Rangely | Rio Blanco | 2.33 |
| Berthoud Community Library District | Berthoud | Larimer | 2 |
| Cortez Public Library | Cortez | Montezuma | 2 |
| Ignacio Community Library District | Ignacio | La Plata | 2 |
| Lamar Public Library | Lamar | Prowers | 2 |
| Lone Cone Library District (Norwood) | Norwood | San Miguel | 2 |
| Moffat County Library | Craig | Moffat | 2 |
| Nederland Community Library District | Nederland | Boulder | 2 |
| Penrose Community Library District | Penrose | Fremont | 2 |
| Southwest La Plata Library District | Durango | La Plata | 2 |
| Vail Public Library | Vail | Eagle | 2 |
| Burlington Public Library | Burlington | Kit Carson | 1.75 |
| East Cheyenne County Library District | Cheyenne Wells | Cheyenne | 1.67 |
| Kiowa County Public Library District | Eads | Kiowa | 1.6 |
| West Custer County Library District | Westcliffe | Custer | 1.6 |
| Gunnison County Library District | Gunnison | Gunnison | 1.5 |
| Ouray Library District | Ouray | Ouray | 1.5 |
| Mineral County School/Regional Public Library | Creede | Mineral | 1.14 |
| Dolores County School/Public Library (Dove Creek) | Dove Creek | Dolores | 1.13 |
| Akron Public Library | Akron | Washington | 1 |
| Conejos County Library District | La Jara | Conejos | 1 |
| Haxtun Public Library | Haxtun | Phillips | 1 |
| Hinsdale Library District/Lake City | Lake City | Hinsdale | 1 |
| Holyoke/Heginbotham Library | Holyoke | Phillips | 1 |
| Jackson County Public Library | Walden | Jackson | 1 |
| Julesburg Public Library | Julesburg | Sedgwick | 1 |
| La Junta/Woodruff Memorial Library | La Junta | Otero | 1 |
| Las Animas-Bent County Library District | Las Animas | Bent | 1 |
| Limon Memorial Library | Limon | Lincoln | 1 |
| Meeker Regional Library District | Meeker | Rio Blanco | 1 |
| Silverton Public Library | Silverton | San Juan | 1 |
| Swink School/Public Library | Swink | Otero | 1 |
| West Routt Library District/Hayden | Hayden | Routt | 1 |
| Costilla County Public Library | San Luis | Costilla | 0.8 |
| South Routt Library District | Oak Creek | Routt | 0.8 |
| Fowler Public Library | Fowler | Otero | 0.7 |
| Nucla Public Library | Nucla | Montrose | 0.63 |
| Fleming Community Library (School/Public) | Fleming | Logan | 0.6 |
| Aguilar Public Library | Aguilar | Las Animas | 0.5 |
| Combined Community Library (Ordway) | Ordway | Crowley | 0.5 |
| Hugo Public Library | Hugo | Lincoln | 0.5 |
| Stratton Public Library | Stratton | Kit Carson | 0.5 |
| Lincoln County Bookmobile | Limon | Lincoln | 0.42 |
| Holly Public Library | Holly | Prowers | 0.25 |
| Wetmore Community Library | Wetmore | Custer | 0.25 |
| Dolores Library District/Montezuma County | Dolores | Montezuma | 0 |
| Flagler Community Library | Flagler | Kit Carson | 0 |
Largest first by librarians (FTE), as each employer reports it to its federal registry.
Source: Institute of Museum and Library Services, Public Libraries Survey, Fiscal Year 2024. Data captured October 2, 2026.
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