Routt County area

Population and density of Routt County

The Census Bureau estimates that 25,329 people lived in Routt County on July 1, 2025. That ranks #1,658 of 3,222 county equivalents nationally and #23 of 64 in Colorado. Since the April 1, 2020 estimates base of 24,829, the population has grown by 500 (+2%), compared with +4.1% for Colorado as a whole.

With 2,362 square miles of land, that is 11 people per square mile (4.1 per km²), placing Routt County #2,622 nationally for density and #33 in Colorado. The median county equivalent has 47 people per square mile; the Colorado median is 11. Put another way, there are about 60 acres of land per resident.

U.S. Census Bureau, Vintage 2025 population estimates. Estimates are revised each year and are not decennial census counts. Density divides the whole population by the whole county’s land area, so it describes an average, not how settlement is distributed within the county. Population sources and methods.

Cities and towns in Routt County

4 incorporated places lie at least partly in Routt County. Together they are home to 17,014 people (67.2%); the other 8,315 (32.8%) live outside any incorporated place, in unincorporated communities and rural areas.

The largest is Steamboat Springs city, with 13,557 residents in the county. Among places with at least 1,000 residents in 2020, Hayden town grew fastest since then (+16.5%).

Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Routt County. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.

Metropolitan area

Routt County is a central county of the Steamboat Springs, CO Micropolitan Statistical Area. Its 2 county equivalents have 38,451 residents on 7,105.3 square miles of land; Routt County accounts for 33.2% of the land and 65.9% of the residents. By combined land it ranks #9 of 542 micropolitan areas, and #342 by population.

ZIP codes

11 ZIP Code Tabulation Areas have land in Routt County; 9 of them have most of their land inside the county, and the others mainly cover neighboring areas.

8042880463804678046980479804838048781625816388163981653

ZIP Code Tabulation Areas are the Census Bureau’s approximations of USPS ZIP Code service areas, from the 2020 Census relationship files. Lighter codes have less than half of their land in this county. Post-office-box and single-address ZIP Codes have no tabulation area.

Counties bordering Routt County

Routt County shares a land border with 7 county equivalents, including 1 in Wyoming. It has more land than 3 of them. The largest neighbor is Carbon County (7,897.7 mi²) and the smallest is Jackson County (1,613.7 mi²). Together with its neighbors, Routt County forms a block of 26,316.2 mi² of land, of which it holds 9%.

How big is Routt County compared with U.S. states?

Routt County has more land than 2 of the 50 states. It is about 1.2 times the land area of Delaware (1,948.6 mi²), while Connecticut, the next larger state, has 2.1 times as much land (4,842.5 mi²). Colorado’s county land could hold about 44 areas the size of Routt County.

Another way to picture it: the same land area would fill a square about 48.6 miles (78.2 km) on each side. Real county shapes are rarely square, so this is a scale reference rather than a width or driving distance.

State figures are the sums of each state’s county-equivalent land measurements in the same Census release, so states and counties are compared on the same basis. Published state totals can differ slightly because of rounding. Compare all states · Counties bigger than entire states.

What stands out about Routt County?

Routt County has more land than 2,987 of the other 3,221 county equivalents in the dataset.

A median is the middle county-equivalent measurement, not the average of the largest and smallest. All three bars use the same linear scale. Very small areas may appear as a thin sliver; the labels retain their values.

Does including water change its rank?

Using land plus water places Routt County at #258 nationally by total area, 23 places farther from the top than its land rank. Other county equivalents gain more area when their water measurements are included.

Its water share is 0.3%, compared with a national county-equivalent median of 1.2% — 0.9 percentage points lower. This describes the statistical geography’s land/water mix, not flood exposure or developable land.

Closest positions in the national land ranking

These entries sit immediately beside Routt County in the national ranking. They can be in different states and are not necessarily geographic neighbors.

Calculated from the same Census release as the area table. Total-area order uses original ALAND + AWATER; water shares and chart labels use published square miles. Calculation details.