Clayton, California

City of Clayton
City of Clayton
City
	Parts of Clayton as seen from Mt. Diablo in Summer 2005
	Logo
	Location of Clayton in Contra Costa County, California.
	City of Clayton Location in the United States
	Coordinates: 37°56′28″N 121°56′09″W / 37.94111°N 121.93583°W
Country	United States
State	California
County	Contra Costa
Incorporated	March 18, 1964
Government
• Mayor	Julie Pierce
• State Senator	Jesse Arreguín (D)
• State Assembly	Anamarie Avila Farias (D)
• U. S. Congress	Mark DeSaulnier (D)
Area
• Total	3.84 sq mi (9.95 km2)
• Land	3.84 sq mi (9.95 km2)
• Water	0.00 sq mi (0.00 km2) 0%
Elevation	394 ft (120 m)
Population (2020)
• Total	11,070
• Density	2,882.81/sq mi (1,113.09/km2)
Time zone	UTC-8 (PST)
• Summer (DST)	UTC-7 (PDT)
ZIP code	94517
Area code	925
FIPS code	06-13882
GNIS feature IDs	277488, 2409474
Website	www.ci.clayton.ca.us

Clayton (formerly Clayton's and Claytonville^[7]) is a city in Contra Costa County, California, United States. The population was 11,585 as of the 2020 census.

^ "California Cities by Incorporation Date". California Association of Local Agency Formation Commissions. Archived from the original (Word) on November 3, 2014. Retrieved March 26, 2013.
^ "Clayton City Council". City of Clayton. Retrieved March 27, 2013.
^ "Senators". State of California. Retrieved March 21, 2013.
^ "Members Assembly". State of California. Retrieved March 21, 2013.
^ "California's 10th Congressional District - Representatives & District Map". Civic Impulse, LLC. Retrieved March 9, 2013.
^ "2020 U.S. Gazetteer Files". United States Census Bureau. Retrieved October 30, 2021.
^ U.S. Geological Survey Geographic Names Information System: Clayton, California