Pittsburg, CA ZIP Code
Pittsburg, California has one ZIP code: .
Mail addressed to Pittsburg covers nearby places too.
Where the 94565 ZIP code reaches
Tap or point to an area to see its ZIP code.Full-size map
Dashed line: Pittsburg city limits.
Map: Census Bureau ZIP Code Tabulation Areas (2020) and place limits (2024).
Check an address in Pittsburg
Street ranges from the Census Bureau, 2026. PO box and organization ZIP codes are not found by street. A new street may be missing: address not found?
Why your mail may say Pittsburg when you live outside it
Pittsburg ZIP codes also cover Bay Point, so a letter addressed to Pittsburg can go to a home outside the city limits.
A ZIP code does not set your city, school district or tax. Contra Costa County property records show which city you are in.
Pittsburg ZIP code questions
What is the main ZIP code for Pittsburg?
94565, the ZIP code of the main Atlantic Plaza post office at 296 Atlantic Ave.
What county is Pittsburg in?
Contra Costa County.
ZIP codes for towns near Pittsburg
More towns near Pittsburg: Oakley, Danville, San Ramon, Fairfield, Vallejo, Dublin, Castro Valley, Vacaville, Livermore.
Sources and last checked
USPS ZIP Locale Detail (October 1, 2026), GeoNames (CC BY 4.0), U.S. Census Bureau, HUD-USPS crosswalk.
Checked October 20, 2026. Sources · How we build our lists · Corrections