Contra Costa refers to Contra Costa County, California and many things within or adjacent to its borders, including:
Population centers Contra Costa Centre, California
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 Contra Costa Canal Contra Costa Water District
Schools Contra Costa Community College District Contra Costa College West Contra Costa Unified School District
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 Contra Costa Times
Related lists California Historical Landmarks in Contra Costa County National Register of Historic Places listings in Contra Costa County, California