Clark County is a county in the U.S. state of Ohio. As of the 2020 census, the population was 136,001.[1] Its county seat is Springfield.[2] The county was created on March 1, 1818. It was named for General George Rogers Clark,[3] a hero of the American Revolution.
Municipalities and communities of Clark County, Ohio, United States | ||
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Cities | ![]() | |
Villages |
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Townships |
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CDPs |
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Unincorporated communities |
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Ghost towns |
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Footnotes | ‡This populated place also has portions in an adjacent county or counties |