Mill Valley, California Zip Codes
📍 Mill Valley is in Marin County, California with 2 zip codes; the most populous is 94941.
Mill Valley is a USPS city name in Marin County, California with a Census population of approximately 32,190 across its ZIP codes. Marin County as a whole has 42 ZIP codes in this directory. Below you'll find every zip code serving Mill Valley 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 Mill Valley Zip Codes
Mill Valley at a Glance
Mill Valley 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 32,190 residents, the largest being 94941 with 32,190 people.
The median ZIP in Mill Valley has a household income of $206,580 and a home value of $1,798,100, a price-to-income ratio of 8.7, above the 6.7 California ZIP median. Median rent across these ZIPs is $2,853 a month.
67% of households in the typical Mill Valley ZIP own their home (statewide ZIP median 64%). 78% of adults hold a bachelor's degree, far above the 31% statewide median. The median poverty rate is 5.5%, below the 10.8% statewide ZIP median. Overall density is about 854 residents per square mile across 38 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.
Mill Valley Zip Code Map
Interactive map of Mill Valley, California zip codes. Click any marker for details.