Find the last 4 digits (ZIP+4) for an address in 94561

ZIP 94561, Oakley, CA is filled in. Just type the street address.

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ZIP Code 94561 – Oakley, CA

Oakley, California · Contra Costa County · Pacific time

ZIP code94561
CityOakley
StateCalifornia
CountyContra Costa County
Population46,368
Time zonePacific · local time
ZIP typeStandard (has a Census ZCTA area)
Land area17.34 sq mi
Center (lat, long)37.9935, -121.6912

Area codes in this area

925

These are the area codes that most often serve ZIP 94561 (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.

Map

Nearby ZIP codes

94548 Knightsen · 2.5 mi94511 Bethel Island · 4.1 mi94513 Brentwood · 4.7 mi94531 Antioch · 5.3 mi94509 Antioch · 6.6 mi94505 Discovery Bay · 9.9 mi95219 Stockton · 10.2 mi94571 Rio Vista · 11.6 mi

About ZIP 94561

ZIP code 94561 is assigned to Oakley, California. It lies in Contra Costa County. Its Census area covers about 17.34 square miles of land. The closest neighboring ZIP is 94548 (Knightsen), about 2.5 miles away.

Every address in 94561 also has a 4-digit add-on code (ZIP+4) that points to a smaller delivery area. Use the box above to find it.

Sources: US Census Bureau (ZCTA, county relationship files), GeoNames (CC BY 4.0), NANPA via NumberResearch.org (CC BY 4.0). Map © OpenStreetMap contributors. ZIP areas are approximate. Population: U.S. Census Bureau, ACS 5-year estimates, 2024 (ZCTA). Data sources