Contra Costa County, CA

County

26,342 species observed across 8 groups · Pop. 1.2M

Ecoregions

Hover, click, or use the arrow keys to explore regions

Species observed

Birds· 863 species

Mammals· 239 species

Plants· 8,488 species

Reptiles & Amphibians· 200 species

Fish· 418 species

Insects· 8,901 species

Other Invertebrates· 2,262 species

Fungi & Lichens· 4,971 species

Explore nearby

Part of

StateCaliforniaPop. 39.5M

Cities in Contra Costa County

Antioch, CAPop. 115.4KBrentwood, CAPop. 64.5KClayton, CAPop. 11.1KConcord, CAPop. 125.3KDanville, CAPop. 43.6KHercules, CAPop. 26.1KLafayette, CAPop. 25.4KMartinez, CAPop. 37.2KMoraga, CAPop. 16.9KOakley, CAPop. 43.5KOrinda, CAPop. 19.5KPinole, CAPop. 19.0KPittsburg, CAPop. 76.4KPleasant Hill, CAPop. 34.6KRichmond, CAPop. 116.2KSan Pablo, CAPop. 32.1KSan Ramon, CAPop. 86.4KWalnut Creek, CAPop. 70.2K