Nicasio, California Zip Codes
📍 Nicasio is in Marin County, California with 1 zip code; the most populous is 94946.
Nicasio is a USPS city name in Marin County, California with a Census population of approximately 673 across its ZIP codes. Marin County as a whole has 42 ZIP codes in this directory. Below you'll find every zip code serving Nicasio 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 Nicasio Zip Codes
Nicasio at a Glance
Nicasio has 1 ZIP code in this directory: 1 standard delivery ZIP. The 1 ZIP with published Census housing data cover 673 residents, the largest being 94946 with 673 people.
The median ZIP in Nicasio has a household income of $125,179 and a home value of more than $2,000,000, a price-to-income ratio of at least 16.0, far above the 6.7 California ZIP median. Median rent across these ZIPs is $2,025 a month.
76% of households in the typical Nicasio ZIP own their home (statewide ZIP median 64%). 54% of adults hold a bachelor's degree, far above the 31% statewide median. The median poverty rate is 5.1%, far below the 10.8% statewide ZIP median. Overall density is about 18 residents per square mile across 37 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.
Nicasio Zip Code Map
Interactive map of Nicasio, California zip codes. Click any marker for details.