Zip Code 94531 - 94531 is entirely within contra costa county. Web look up a zip code ™. Look up a zip code. Web 94509 & 94531 are the only zip codes for antioch, ca enter an address to find the zip+4 and ensure faster mail. Enter a corporate or residential street address, city, and state to see a specific. Regionally, it is located in. 94531 zip code is spread between the. Web zip code 94531 is located in antioch california. Web zip code 94531 is located in the county of contra costa in the state of california. Web zip code 94531 is located in the city of antioch, california and covers 14.028 square miles of land area.
94531 is entirely within contra costa county. Web 94509 & 94531 are the only zip codes for antioch, ca enter an address to find the zip+4 and ensure faster mail. Web zip code 94531 is located in antioch california. Enter a corporate or residential street address, city, and state to see a specific. Look up a zip code. 94531 zip code is spread between the. Web zip code 94531 is located in the city of antioch, california and covers 14.028 square miles of land area. Web look up a zip code ™. Regionally, it is located in. Web zip code 94531 is located in the county of contra costa in the state of california.