Mercer County, NJ

County

27,131 species observed across 8 groups · Pop. 386.5K

Ecoregions

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Species observed

Birds· 727 species

Mammals· 173 species

Plants· 6,710 species

Reptiles & Amphibians· 200 species

Fish· 451 species

Insects· 12,194 species

Other Invertebrates· 1,758 species

Fungi & Lichens· 4,918 species

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Part of

StateNew JerseyPop. 9.3M

Cities in Mercer County

Princeton, NJPop. 30.6KTrenton, NJPop. 90.6K