9 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% | 2,323 | 35 | City |
| Berthoud | 3 | 14,407 | 10,611 | 5.56% | 1,109 | 13 | Town |
| Wellington | 4 | 12,339 | 11,144 | 1.98% | 3,215 | 4 | Town |
| Timnath | 5 | 11,873 | 6,745 | 9.45% | 1,625 | 7 | Town |
| Estes Park | 6 | 5,768 | 5,902 | -0.47% | 862 | 7 | Town |
| Laporte | 7 | 2,179 | 2,299 | -0.82% | 356 | 6 | CDP |
| Red Feather Lakes | 8 | 449 | 591 | 1.58% | 49 | 9 | CDP |
| Woods Landing-Jelm | 9 | 227 | 134 | 7.08% | 14 | 17 | CDP |
Fort Collins is the largest city in Larimer County, with a population of 171,157.
Woods Landing-Jelm is the smallest city in Larimer County, with a population of 227.
There are 9 cities in Larimer County, Colorado.