There are 25 cities in Larimer County, Colorado.
Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)
City | Rank | 2024 Population | 2020 Population | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Fort Collins | 1 | 170,507 | 169,982 | 0.08% | 2,979 | 57.2 | City |
| Greeley | 2 | 113,721 | 109,272 | 0.99% | 2,300 | 49.4 | City |
| Boulder | 3 | 105,156 | 108,123 | -0.7% | 3,910 | 26.9 | City |
| Longmont | 4 | 98,444 | 99,188 | -0.19% | 3,390 | 29.0 | City |
| Loveland | 5 | 80,347 | 76,366 | 1.25% | 2,268 | 35.4 | City |
| Windsor | 6 | 42,722 | 33,230 | 5.88% | 1,639 | 26.1 | Town |
| Erie | 7 | 36,886 | 30,417 | 4.58% | 1,779 | 20.7 | Town |
| Johnstown | 8 | 20,225 | 17,369 | 3.66% | 1,310 | 15.4 | Town |
| Firestone | 9 | 19,231 | 16,663 | 3.45% | 1,384 | 13.9 | Town |
| Frederick | 10 | 18,660 | 14,724 | 5.57% | 1,227 | 15.2 | Town |
| Berthoud | 11 | 14,113 | 10,613 | 6.61% | 1,086 | 13.0 | Town |
| Wellington | 12 | 12,387 | 11,151 | 2.56% | 3,227 | 3.8 | Town |
| Severance | 13 | 11,762 | 7,993 | 8.71% | 1,291 | 9.1 | Town |
| Timnath | 14 | 11,074 | 6,740 | 10.84% | 1,515 | 7.3 | Town |
| Gunbarrel | 15 | 10,249 | 10,494 | 0.7% | 1,641 | 6.2 | CDP |
| Milliken | 16 | 9,291 | 8,462 | 2.28% | 711 | 13.1 | Town |
| Mead | 17 | 6,998 | 4,805 | 8.5% | 465 | 15.0 | Town |
| Estes Park | 18 | 5,798 | 5,900 | -0.45% | 866 | 6.7 | Town |
| Niwot | 19 | 4,105 | 4,085 | 0.17% | 1,027 | 4.0 | CDP |
| Platteville | 20 | 2,878 | 2,957 | -0.69% | 922 | 3.1 | Town |
| Laporte | 21 | 2,197 | 2,299 | -0.81% | 359 | 6.1 | CDP |
| Lyons | 22 | 2,132 | 2,207 | -0.88% | 1,579 | 1.4 | Town |
| Allenspark | 23 | 638 | 464 | 1.27% | 53 | 11.9 | CDP |
| Red Feather Lakes | 24 | 442 | 591 | 1.61% | 48 | 9.1 | CDP |
| Woods Landing-Jelm | 25 | 212 | 134 | 7.61% | 13 | 16.7 | CDP |
Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.
Fort Collins is the largest city in Larimer County.
Woods Landing-Jelm is the smallest city in Larimer County.
There are 25 cities in Larimer County, Colorado.