Sully County, South Dakota

Sully County population, land area and income

Sully County had 1,468 residents in the Census Vintage 2024 estimate, on 1,006.7 square miles of land. It ranks 62nd of 66 in South Dakota by population and 30th by land area. That works out to 1.5 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, so Sully County has 28% of the typical county's population.

Its SAIPE 2023 median household income of $74,496 is in the top quarter among 3,143 counties with an estimate.

How Sully County's population changed since 2020

Sully County gained 16 residents between the July 2020 and July 2024 estimates, a rise of 1.1%. That ranks 28th 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, Sully County recorded 54 births and 60 deaths, a natural change of -6. Net international migration added +22 and net domestic migration, people moving to or from other US counties, came to +8. The largest single component was international migration, which added 22 people.

Where Sully County is

The Census internal point of Sully County is at 44.722300, -100.131400. 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 Sully County outlined. Dots are towns of 1,000+ people with residents in it.

Towns in Sully County

No incorporated place of 1,000 or more people has residents in Sully County. Its 1,468 residents live in smaller towns, census-designated places, or unincorporated land, which the subcounty estimates do not list at this size.

Counties bordering Sully County

The Census 2024 county adjacency file lists 5 neighbors for Sully County. The most populous is Hughes County, SD, with 17,526 residents. Distances run between Census internal points in a straight line.

• Hughes County

  17,526 people

  25 mi SSE

• Dewey County

  5,322 people

  45 mi NW

• Stanley County

  3,015 people

  37 mi SW

• Potter County

  2,402 people

  24 mi NNE

• Hyde County

  1,215 people

  35 mi ESE

Distance to Pierre and the nearest big city

Pierre is 26.7 miles SSW of Sully County's internal point in a straight line. The nearest place of 100,000 or more is Sioux Falls, SD (population 209,289), 187.3 miles away. The nearest place of 10,000 or more is Pierre, SD (population 13,788), 25.7 miles away.

Sully County FIPS code

The FIPS code of Sully County is 46119: state code 46 for South Dakota plus county code 119. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $74,496.