Chouteau County area

Population and density of Chouteau County

The Census Bureau estimates that 5,865 people lived in Chouteau County on July 1, 2025. That ranks #2,817 of 3,222 county equivalents nationally and #34 of 56 in Montana. Since the April 1, 2020 estimates base of 5,911, the population has declined by 46 (−0.8%), compared with +5.6% for Montana as a whole.

With 3,972.5 square miles of land, that is 1.5 people per square mile (0.57 per km²), placing Chouteau County #3,106 nationally for density and #41 in Montana. The median county equivalent has 47 people per square mile; the Montana median is 2.8. Put another way, there are about 433 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 Chouteau County

3 incorporated places lie at least partly in Chouteau County. Together they are home to 2,218 people (37.8%); the other 3,647 (62.2%) live outside any incorporated place, in unincorporated communities and rural areas.

The largest is Fort Benton city, with 1,416 residents in the county.

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

Metropolitan area

Chouteau County is not part of any metropolitan or micropolitan statistical area in the Office of Management and Budget’s July 2023 delineation; 1,306 other county equivalents are also outside one. These areas are built around an urban core of at least 10,000 people plus the counties tied to it by commuting, so counties outside them are generally rural.

ZIP codes

13 ZIP Code Tabulation Areas have land in Chouteau County; 7 of them have most of their land inside the county, and the others mainly cover neighboring areas.

59404594055941659420594405944259446594475945059460595205952159540

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 Chouteau County

Chouteau County shares a land border with 8 county equivalents. It has more land than 6 of them. The largest neighbor is Fergus County (4,339.3 mi²) and the smallest is Liberty County (1,430 mi²). Together with its neighbors, Chouteau County forms a block of 25,332.8 mi² of land, of which it holds 15.7%.

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

Chouteau County has more land than 2 of the 50 states. It is about 2 times the land area of Delaware (1,948.6 mi²), while Connecticut, the next larger state, has 1.2 times as much land (4,842.5 mi²). Montana’s county land could hold about 37 areas the size of Chouteau County.

Another way to picture it: the same land area would fill a square about 63 miles (101.4 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 Chouteau County?

Chouteau County has more land than 3,099 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 Chouteau County at #131 nationally by total area, 8 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 0.6%, compared with a national county-equivalent median of 1.2% — 0.6 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 Chouteau 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.