Buffalo 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
Fort Thompson11,1361,275-0.96%10910.4CDP
Millerdale Colony2100167.53%3890.3CDP
Gann Valley314117.69%1770.1CDP

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 Buffalo County, South Dakota?

Fort Thompson is the largest city in Buffalo County.

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

Gann Valley is the smallest city in Buffalo County.

How many cities are in Buffalo County?

There are 3 cities in Buffalo County, South Dakota.

Frequently Asked Questions