Jefferson County, IL

County

15,350 species observed across 8 groups · Pop. 37.0K

Ecoregions

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Species observed

Birds· 445 species

Mammals· 100 species

Plants· 4,237 species

Reptiles & Amphibians· 174 species

Fish· 261 species

Insects· 6,954 species

Other Invertebrates· 972 species

Fungi & Lichens· 2,207 species

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Part of

StateIllinoisPop. 12.8M

Cities in Jefferson County

Mount Vernon, ILPop. 14.6K