South San Francisco, California Zip Codes
📍 South San Francisco is in San Mateo County, California with 3 zip codes; the most populous is 94080.
South San Francisco is a USPS city name in San Mateo County, California with a Census population of approximately 66,262 across its ZIP codes. San Mateo County as a whole has 57 ZIP codes in this directory. Below you'll find every zip code serving South San Francisco with population, income and home value, a map, and the city's affordability profile.
Population and demographic data sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code routing data sourced from the United States Postal Service (USPS).
All South San Francisco Zip Codes
| ZIP Code | City | Details |
|---|---|---|
| 94080 | South San Francisco | View → |
| 94083 | South San Francisco | View → |
| 94099 | South San Francisco | View → |
South San Francisco at a Glance
South San Francisco has 3 ZIP codes in this directory: 1 standard delivery ZIP and 2 PO Box or unique ZIPs that carry no resident population in Census data. The 1 ZIP with published Census housing data cover 66,262 residents, the largest being 94080 with 66,262 people.
The median ZIP in South San Francisco has a household income of $126,916 and a home value of $1,111,900, a price-to-income ratio of 8.8, above the 6.7 California ZIP median. Median rent across these ZIPs is $2,649 a month.
62% of households in the typical South San Francisco ZIP own their home (statewide ZIP median 64%). 39% of adults hold a bachelor's degree, above the 31% statewide median. The median poverty rate is 6.7%, below the 10.8% statewide ZIP median. Overall density is about 6,496 residents per square mile across 10 square miles of ZIP land area.
Medians are taken across the ZIP codes listed below (each ZIP weighted equally); PO Box and no-data ZIPs are excluded. Definitions on the methodology page; statewide comparisons in the 2026 California ZIP Code Affordability Report.
South San Francisco Zip Code Map
Interactive map of South San Francisco, California zip codes. Click any marker for details.