There are 5 cities in Clark County, Illinois.

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City
Rank
State
2024 Population
2020 Census
Annual Change
Density (mi²)
Area (mi²)
Marshall1Illinois3,8653,948-0.59%1,0683.62
Casey2Illinois2,3362,407-0.85%1,0862.15
Martinsville3Illinois1,0781,111-0.83%5332.02
Westfield4Illinois519535-0.77%5310.98
West Union5Illinois197241 1241.58
showing: 5 rows

Cities in Clark County, Illinois by Population (2024)

What is the largest city in Clark County, Illinois?

Marshall is the largest city in Clark County.

What is the smallest city in Clark County, Illinois?

West Union is the smallest city in Clark County.

How many cities are in Clark County?

There are 5 cities in Clark County, Illinois.

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