| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Steamboat Springs | 1 | 13,687 | 13,225 | 0.96% | 1,384 | 10 | City |
| Hayden | 2 | 2,251 | 1,932 | 0.04% | 654 | 3 | Town |
| Oak Creek | 3 | 827 | 889 | -0.84% | 2,241 | 0 | Town |
| Yampa | 4 | 371 | 394 | -0.54% | 1,508 | 0 | Town |
Steamboat Springs is the largest city in Routt County, with a population of 13,687.
Yampa is the smallest city in Routt County, with a population of 371.
There are 4 cities in Routt County, Colorado.