4 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Steamboat Springs | 1 | 13,819 | 13,222 | 0.73% | 1,397 | 10 | City |
| Hayden | 2 | 1,914 | 1,931 | -0.16% | 556 | 3 | Town |
| Oak Creek | 3 | 839 | 890 | -0.94% | 2,274 | 0 | Town |
| Yampa | 4 | 385 | 399 | -0.52% | 1,565 | 0 | Town |
Steamboat Springs is the largest city in Routt County, with a population of 13,819.
Yampa is the smallest city in Routt County, with a population of 385.
There are 4 cities in Routt County, Colorado.