Millbrae, California Zip Codes
📍 Millbrae is in San Mateo County, California with 2 zip codes; the most populous is 94030.
Millbrae is a USPS city name in San Mateo County, California with a Census population of approximately 22,825 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 Millbrae 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 Millbrae Zip Codes
Millbrae at a Glance
Millbrae has 2 ZIP codes in this directory: 1 standard delivery ZIP and 1 PO Box or unique ZIP that carries no resident population in Census data. The 1 ZIP with published Census housing data cover 22,825 residents, the largest being 94030 with 22,825 people.
The median ZIP in Millbrae has a household income of $146,649 and a home value of $1,874,100, a price-to-income ratio of 12.8, far above the 6.7 California ZIP median. Median rent across these ZIPs is $3,322 a month.
61% of households in the typical Millbrae ZIP own their home (statewide ZIP median 64%). 50% of adults hold a bachelor's degree, far above the 31% statewide median. The median poverty rate is 6.4%, below the 10.8% statewide ZIP median. Overall density is about 6,713 residents per square mile across 3 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.
Millbrae Zip Code Map
Interactive map of Millbrae, California zip codes. Click any marker for details.