Fall River County, South Dakota

Fall River County population, land area and income

Fall River County had 7,359 residents in the Census Vintage 2024 estimate, on 1,739.9 square miles of land. It ranks 25th of 66 in South Dakota by population and 12th by land area. That works out to 4.2 people per square mile, below the US average of 96.3, and in the bottom quarter nationally.

The median county-equivalent in South Dakota has 5,296 residents; Fall River County is somewhat larger.

Its SAIPE 2023 median household income of $58,834 is below the national county median among 3,143 counties with an estimate.

How Fall River County's population changed since 2020

Fall River County gained 386 residents between the July 2020 and July 2024 estimates, a rise of 5.5%. That ranks 8th of 66 in South Dakota for growth. The median South Dakota county changed by +0.8%, and the state as a whole by +4.1%.

Since the April 2020 estimates base, Fall River County recorded 193 births and 593 deaths, a natural change of -400. Net international migration added -1 and net domestic migration, people moving to or from other US counties, came to +794. The largest single component was domestic migration, which added 794 people.

Where Fall River County is

The Census internal point of Fall River County is at 43.221600, -103.512600. It sits in UTM zone 13N. The map shades South Dakota's 66 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Fall River County outlined. Dots are towns of 1,000+ people with residents in it.

Towns in Fall River County

One incorporated place of 1,000+ people has residents in Fall River County, 3,608 people together, or 49% of the county. Each figure counts only the part of the town inside Fall River County; towns marked "part" extend into another county. The largest is Hot Springs with 3,608.

Counties bordering Fall River County

The Census 2024 county adjacency file lists 5 neighbors for Fall River County, including 3 across a state line. The most populous is Oglala Lakota County, SD, with 13,360 residents. Distances run between Census internal points in a straight line.

• Oglala Lakota County

  13,360 people

  48 mi E

• Custer County

  9,330 people

  32 mi N

• NE

  Dawes County, NE

  8,003 people

  40 mi SSE

• WY

  Niobrara County, WY

  2,301 people

  49 mi WSW

• NE

  Sioux County, NE

  1,099 people

  53 mi SSW

Distance to Pierre and the nearest big city

Pierre is 176.6 miles ENE of Fall River County's internal point in a straight line. The nearest place of 100,000 or more is Fort Collins, CO (population 170,924), 201.2 miles away. The nearest place of 10,000 or more is Rapid City, SD (population 79,894), 60.5 miles away.

Fall River County FIPS code

The FIPS code of Fall River County is 46047: state code 46 for South Dakota plus county code 047. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $58,834.