Contra Costa County, California, United States

Overview of Contra Costa County

• Name:
  Contra Costa County
• Place Type:
  County
• Located In:
  California, United States
  
• History (GNIS):
  Established 18 February 1850
• County Seat:
  Martinez
• Coordinates:
  Latitude:37.933256537° 55' 59.7"N

  Longitude:-121.9344036121° 56' 03.9"W
• Population:
  803,732
• Elevation:
  152 m
• Surrounding Counties:
  • Sacramento NE
  • San Joaquin E
  • Alameda S
  • San Francisco W
  • Marin W
  • Sonoma NW
  • Solano N
• Histopolis Place ID:
  530417360
• Updated May 5, 2020