Polk County, IA

County

8,489 species observed across 8 groups · Pop. 493.0K

Ecoregions

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Species observed

Birds· 409 species

Mammals· 74 species

Plants· 2,523 species

Reptiles & Amphibians· 78 species

Fish· 127 species

Insects· 4,648 species

Other Invertebrates· 580 species

Fungi & Lichens

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Part of

StateIowaPop. 3.2M

Cities in Polk County

Altoona, IAPop. 19.7KAnkeny, IAPop. 68.5KDes Moines, IAPop. 213.8KJohnston, IAPop. 24.1KNorwalk, IAPop. 12.9KPleasant Hill, IAPop. 10.2K