Union County, South Dakota Cities (2024)

Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)

City
Rank
2024 Pop.
2020 Pop.
Change
Density (/mi²)
Area (mi²)
Type
Dakota Dunes14,6633,2317.69%1,8892.5CDP
North Sioux City23,0493,0440.03%1,1372.7City
Beresford32,0782,178-1.19%1,1651.8City
Elk Point42,0532,140-1.06%1,3251.5City
Alcester5766825-1.92%1,0440.7City
Jefferson6439473-2.01%8610.5City
Richland71961547.69%355.6CDP

Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.

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

Dakota Dunes is the largest city in Union County.

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

Richland is the smallest city in Union County.

How many cities are in Union County?

There are 7 cities in Union County, South Dakota.

Frequently Asked Questions