Jefferson County, Missouri 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.)

25 cities

City
Rank
2024 Pop.
2020 Pop.
Change
Density (/mi²)
Area (mi²)
Type
Arnold121,12720,8530.32%1,83311.5City
Festus213,68312,7211.79%2,3175.9City
Murphy38,3838,373-0.26%2,1703.9CDP
De Soto46,5096,4450.25%1,4854.4City
Barnhart56,1006,6760.49%1,2315.0CDP
Pevely66,0686,0500.07%1,2005.1City
Imperial75,4984,9471.05%1,0495.2CDP
Herculaneum85,4224,7133.38%1,3044.2City
Crystal City94,7114,734-0.13%1,0434.5City
High Ridge104,7094,2570.62%1,2493.8CDP
Hillsboro113,5053,4910.09%9123.8City
Byrnes Mill123,1883,1760.09%6205.1City
Terre Lac132,8502,3827.67%4087.0CDP
Raintree Plantation142,1351,9807.72%1,0932.0CDP
Cedar Hill151,4081,625-1.61%6142.3CDP
Summer Set161,3631,0307.75%1,4950.9CDP
Horine179661,0901.15%1,3570.7CDP
Lake Timberline187465487.8%3142.4CDP
Olympian Village19713719-0.28%1,3690.5City
Briarwood Estates203262557.95%4790.7CDP
Cedar Hill Lakes21200204-0.5%9220.2Village
Scotsdale221981930.51%3410.6Town
Parkdale23154156-0.65%1,2030.1Village
Kimmswick24134136-0.74%5730.2City
Peaceful Village2597950%4950.2Village

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 Jefferson County, Missouri?

Arnold is the largest city in Jefferson County.

What is the smallest city in Jefferson County, Missouri?

Peaceful Village is the smallest city in Jefferson County.

How many cities are in Jefferson County?

There are 25 cities in Jefferson County, Missouri.

Frequently Asked Questions