ZIP Code 94509 — Antioch, California
ZIP code 94509 belongs to Antioch, California (county: Contra Costa). It sits at latitude 37.9939, longitude -121.8089 in the America/Los_Angeles time zone.
| Field | Value |
|---|---|
| ZIP code | 94509 |
| City / place | Antioch |
| State | California |
| County | Contra Costa |
| Coordinates | 37.9939, -121.8089 |
| Time zone | America/Los_Angeles |
| City population | 110,542 |
| ZIP type | PO box / unique |
| Telephone area codes | 925 |
What is ZIP code 94509?
94509 is a five-digit ZIP code used by the United States Postal Service for Antioch, California. It is one of 2 ZIP codes associated with Antioch in this dataset. The delivery area is served from the local post office network, so the ZIP can cover more than one neighbourhood or even cross a city line.
ZIP codes in the same city
Area codes and city profile
Telephone area codes serving Antioch: 925. For population, county and county-seat details, see Antioch and all places in California.
Nearby ZIP codes
94531 4.3 km · Antioch94561 9.2 km · Oakley94565 9.5 km · Pittsburg94517 12.4 km · Clayton94513 12.5 km · Brentwood94527 13.8 km · Concord94521 15.1 km · Concord94519 17.8 km · Concord
Frequently asked questions
What city is ZIP code 94509 in?
ZIP code 94509 is in Antioch, California.
What county is 94509 in?
94509 belongs to Contra Costa in California.
What time zone is ZIP code 94509 in?
94509 is in the America/Los_Angeles time zone.