Antioch Flag

Antioch

County Seat:
No
Area (mi²):
29.171
State:
California

Antioch is a city located in Contra Costa County, California. Antioch has a 2026 population of 118,453. Antioch is currently growing at a rate of 1.09% annually and its population has increased by 2.66% since the most recent census, which recorded a population of 115,382 in 2020.

118.5K
Total Population
4,061
Density (mi²)
1.3K 1.09%
Growth

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)