There are 5 cities in Union County, South Dakota.

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City
Rank
State
2024 Population
2020 Census
Annual Change
Density (mi²)
Area (mi²)
North Sioux City1South Dakota3,0583,0420.53%1,1412.68
Beresford2South Dakota2,1012,178-0.66%1,1781.78
Elk Point3South Dakota2,0512,142-1.25%1,5051.36
Alcester4South Dakota763819-1.55%2,2840.33
Jefferson5South Dakota443473-1.56%8690.51
showing: 5 rows

Cities in Union County, South Dakota by Population (2024)

What is the largest city in Union County, South Dakota?

North Sioux City is the largest city in Union County.

What is the smallest city in Union County, South Dakota?

Jefferson is the smallest city in Union County.

How many cities are in Union County?

There are 5 cities in Union County, South Dakota.

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