Say hello to Evi

Evi is our best selling mobile app that can answer questions about books, music, films, conversions, history, people, places and much more.

To experience the full power of Evi you can download her app for free on iOS, Android and Kindle Fire.

You asked:

area of contra costa county, california

Contra Costa County
Contra Costa County

Contra Costa County's area is 802 square miles (2,080 square kilometers).