6 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Fort Collins | 1 | 171,157 | 169,990 | 0.14% | 2,990 | 57 | City |
| Loveland | 2 | 82,283 | 76,375 | 1.46% | 2,276 | 36 | City |
| Berthoud | 3 | 14,407 | 10,611 | 5.56% | 1,109 | 13 | Town |
| Wellington | 4 | 12,339 | 11,144 | 1.98% | 2,816 | 4 | Town |
| Timnath | 5 | 11,873 | 6,745 | 9.45% | 1,513 | 8 | Town |
| Estes Park | 6 | 5,768 | 5,902 | -0.47% | 862 | 7 | Town |
Fort Collins is the largest city in Larimer County, with a population of 171,157.
Estes Park is the smallest city in Larimer County, with a population of 5,768.
There are 6 cities in Larimer County, Colorado.