There are 22 cities in Jefferson County, Missouri.

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City
Rank
2024 Population
2020 Census
Annual Change
Density (mi²)
Area (mi²)
Arnold120,82920,861-0.04%1,80711.53
Festus213,79912,7222.25%2,3845.79
Murphy38,4278,373 2,1373.94
De Soto46,4816,4500.23%1,4794.38
Barnhart56,0406,676 1,1865.09
Pevely66,0316,0410.03%1,4014.30
Herculaneum75,6694,7144.65%1,3644.16
Imperial85,3854,947 1,0275.24
Crystal City94,6924,735-0.19%1,0394.51
High Ridge104,6514,257 1,2333.77
Hillsboro113,4973,4890.06%9103.84
Byrnes Mill123,1703,177-0.03%6195.12
Cedar Hill131,4531,625 6332.29
LaBarque Creek141,2011,165 6817.57
Horine159451,090 1,3270.71
Olympian Village16710719-0.28%1,3630.52
Lake Tekakwitha172352310.43%1,1750.20
Cedar Hill Lakes18203204 9350.22
Scotsdale19192193-0.52%3310.58
Parkdale20155156 1,2110.13
Kimmswick21134135 5800.23
Peaceful Village229293-1.07%4690.20
showing: 22 rows

Cities in Jefferson County, Missouri by Population (2024)

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 22 cities in Jefferson County, Missouri.

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