Contra Costa refers to Contra Costa County, California and many things within or adjacent to its borders, including:
Population centers
Transit
- Contra Costa (railroad ferryboat)
- Pleasant Hill/Contra Costa Centre station
- Alameda-Contra Costa Transit District
- Eastern Contra Costa Transit Authority
- Western Contra Costa Transit Authority
Water
Schools
Other governmental bodies
- Arts and Culture Commission of Contra Costa County
- Contra Costa County Board of Supervisors
- Contra Costa County Employees' Retirement Association
- Contra Costa County Library
- Contra Costa County Superior Court
- Central Contra Costa Sanitary District
- West Contra Costa County Detention Center
Newspaper
Related lists
- California Historical Landmarks in Contra Costa County
- National Register of Historic Places listings in Contra Costa County, California
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