Roberts County, South Dakota

Roberts County population, land area and income

Roberts County had 10,283 residents in the Census Vintage 2024 estimate, on 1,101.1 square miles of land. It ranks 18th of 66 in South Dakota by population and 26th by land area. That works out to 9.3 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; Roberts County is somewhat larger.

Its SAIPE 2023 median household income of $65,069 is above the national county median among 3,143 counties with an estimate.

How Roberts County's population changed since 2020

Roberts County gained 21 residents between the July 2020 and July 2024 estimates, a rise of 0.2%. That ranks 41st 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, Roberts County recorded 595 births and 518 deaths, a natural change of +77. Net international migration added +19 and net domestic migration, people moving to or from other US counties, came to -91. The largest single component was domestic migration, which removed 91 people.

Where Roberts County is

The Census internal point of Roberts County is at 45.623400, -96.947600. It sits in UTM zone 14N. The map shades South Dakota's 66 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Roberts County outlined. Dots are towns of 1,000+ people with residents in it.

Towns in Roberts County

One incorporated place of 1,000+ people has residents in Roberts County, 2,432 people together, or 24% of the county. Each figure counts only the part of the town inside Roberts County; towns marked "part" extend into another county. The largest is Sisseton with 2,432.

Counties bordering Roberts County

The Census 2024 county adjacency file lists 7 neighbors for Roberts County, including 4 across a state line. The most populous is Richland County, ND, with 16,658 residents. Distances run between Census internal points in a straight line.

• ND

  Richland County, ND

  16,658 people

  44 mi N

• Grant County

  7,618 people

  32 mi SSE

• Day County

  5,408 people

  36 mi WSW

• MN

  Big Stone County, MN

  5,067 people

  30 mi ESE

• Marshall County

  4,395 people

  32 mi WNW

• ND

  Sargent County, ND

  3,710 people

  47 mi NW

• MN

  Traverse County, MN

  3,134 people

  25 mi ENE

Distance to Pierre and the nearest big city

Pierre is 187.3 miles WSW of Roberts County's internal point in a straight line. The nearest place of 100,000 or more is Fargo, ND (population 136,285), 85.9 miles away. The nearest place of 10,000 or more is Watertown, SD (population 23,492), 50.4 miles away.

Roberts County FIPS code

The FIPS code of Roberts County is 46109: state code 46 for South Dakota plus county code 109. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $65,069.