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ZIP code 94509

Antioch, CA · Contra Costa County

About ZIP code 94509

  • ZIP code 94509 is in Antioch, Contra Costa County, California.
  • About 70,090 people live in it, which is 1,551.4 people per square mile.
  • Time zone: Pacific Standard Time.
  • The middle of the ZIP code is at 37.992, -121.814.

A ZIP code is a mail delivery area, not a town border, and one ZIP code can cover parts of several towns. To check a single address, use the US Postal Service lookup.

Antioch, CA

ZIP code 94509 is the post office name for Antioch, CA. 116,477 people live in Antioch. Typical household income is $97,465. A typical home costs $629,700.

  • Stronger than most towns on: Diversity & community, Home internet and working from home and Health and medical care.
  • Weaker than most towns on: Short commute, Clean air and low disaster risk and Cost of living.

See all figures for Antioch

Other ZIP codes in Antioch

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ZIP code list from SimpleMaps US Zips. Population is a US Census Bureau estimate. These are estimates, so check official sources before you decide.