Cities in Washington County, Missouri by Population (2024)

There are 24 cities in Washington County, Missouri.

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.)

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City
Rank
State
2024 Population
2020 Census
Annual Change
Density (mi²)
Area (mi²)
Sullivan1Missouri6,7986,918-0.44%8308.20
Bonne Terre2Missouri6,4656,869-1.54%1,5894.07
De Soto3Missouri6,4526,4500.02%1,4724.38
Desloge4Missouri4,9384,8280.57%1,6922.92
Hillsboro5Missouri3,4973,4890.06%9103.84
Potosi6Missouri2,5282,542-0.12%1,0862.33
Terre Lac7Missouri2,5042,3821.25%3586.99
Bourbon8Missouri1,4941,562-1.13%1,1171.34
Steelville9Missouri1,4221,468-0.77%5882.42
Bismarck10Missouri1,2471,2370.24%1,2521
Leadwood11Missouri1,1741,1740%1,0151.16
Summer Set12Missouri1,1481,030-0.86%1,2590.91
Lake Timberline13Missouri7305486.73%3072.38
Olympian Village14Missouri709719-0.28%1,3610.52
Iron Mountain Lake15Missouri6476410.31%3301.96
Oak Grove Village16Missouri400408-0.5%6500.61
Stanton17Missouri3832499.74%1173.27
Irondale18Missouri3673670%6890.53
Briarwood Estates19Missouri3032554.12%4460.68
West Sullivan20Missouri270282-1.1%7420.36
Mineral Point21Missouri2262260%9420.24
Caledonia22Missouri1321320%8050.16
Miramiguoa Park23Missouri1241220.81%3220.39
St. Cloud24Missouri40420%321.24

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 Washington County, Missouri?

Sullivan is the largest city in Washington County.

What is the smallest city in Washington County, Missouri?

St. Cloud is the smallest city in Washington County.

How many cities are in Washington County?

There are 24 cities in Washington County, Missouri.

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