Union County, South Carolina 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
Union17,7938,144-1.12%9758.0City
Monarch Mill21,7581,264-0.23%3135.6CDP
Buffalo31,1411,020-0.78%2844.0CDP
Jonesville4811849-1.22%7991.0Town
Lockhart5366381-1.08%1,2000.3Town
Carlisle6313319-0.64%2211.4Town

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 Carolina?

Union is the largest city in Union County.

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

Carlisle is the smallest city in Union County.

How many cities are in Union County?

There are 6 cities in Union County, South Carolina.

Frequently Asked Questions