Forest Knolls, California Zip Codes
📍 Forest Knolls is in Marin County, California with 1 zip code; the most populous is 94933.
Forest Knolls is a USPS city name in Marin County, California with a Census population of approximately 1,284 across its ZIP codes. Marin County as a whole has 42 ZIP codes in this directory. Below you'll find every zip code serving Forest Knolls 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 Forest Knolls Zip Codes
Forest Knolls at a Glance
Forest Knolls has 1 ZIP code in this directory: 1 standard delivery ZIP. The 1 ZIP with published Census housing data cover 1,284 residents, the largest being 94933 with 1,284 people.
The median ZIP in Forest Knolls has a household income of $116,953 and a home value of $866,400, a price-to-income ratio of 7.4, above the 6.7 California ZIP median. Median rent across these ZIPs is $2,891 a month.
68% of households in the typical Forest Knolls ZIP own their home (statewide ZIP median 64%). 49% of adults hold a bachelor's degree, far above the 31% statewide median. The median poverty rate is 17.4%, far above the 10.8% statewide ZIP median. Overall density is about 401 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.
Forest Knolls Zip Code Map
Interactive map of Forest Knolls, California zip codes. Click any marker for details.