Antioch, CA ZIP Codes, Coordinates & Counties
Antioch, California has 2 ZIP codes in Contra Costa county. The approximate center of Antioch is 37.981, -121.794. Antioch has about 162,932 known street addresses.
ZIP codes in Antioch, CA
| ZIP Code | County | Latitude | Longitude |
|---|---|---|---|
| 94509 | Contra Costa | 37.997 | -121.813 |
| 94531 | Contra Costa | 37.966 | -121.776 |
Counties Antioch spans
Contra Costa
Most common streets in Antioch
18th, G, 10th, D, Sunset, A, 4th, 7th, C, 9th
Frequently asked questions
What ZIP codes are in Antioch, CA?
Antioch, California has 2 ZIP codes, ranging from 94509 to 94531. The full list, with each ZIP's county and coordinates, is in the table on this page.
What county is Antioch, CA in?
Antioch is in Contra Costa county.
What are the latitude and longitude of Antioch, CA?
The approximate center of Antioch, California is latitude 37.981, longitude -121.794. Coordinates for each ZIP code are listed in the table above.
How many ZIP codes does Antioch, CA have?
Antioch has 2 ZIP codes.
How many addresses are in Antioch, CA?
Antioch, California has about 162,932 known street addresses in the sthan.io US address database.
What are the most common streets in Antioch, CA?
Some of the most common street names in Antioch are 18th, G, 10th, D, Sunset, A.
What cities are near Antioch, CA?
Cities near Antioch include Oakley (6 mi), Pittsburg (7 mi), Brentwood (8 mi), Clayton (8 mi), Knightsen (8 mi).
Cities near Antioch
Oakley, CA (6 mi) Pittsburg, CA (7 mi) Brentwood, CA (8 mi) Clayton, CA (8 mi) Knightsen, CA (8 mi) Bethel Island, CA (9 mi) Birds Landing, CA (11 mi) Concord, CA (12 mi)
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View the API →Last updated: June 2026 · Data: sthan.io US address database