Marin County, California Zip Codes

Marin County has 42 ZIP codes in this directory: 29 standard delivery ZIPs and 13 PO Box or unique ZIPs that carry no resident population in Census data. The 26 ZIPs with published Census housing data cover 293,134 residents, the largest being 94901 (San Rafael) with 40,927 people.

The median ZIP in Marin County has a household income of $127,509 and a home value of $1,308,450, a price-to-income ratio of 8.9, above the 6.7 California ZIP median. Affordability ranges from 94963 in San Geronimo at a ratio of 5.1 to 94920 in Belvedere Tiburon, where the median home is above the $2 million Census ceiling. The highest median income is in 94957 (Ross) at more than $250,000. Median rent across these ZIPs is $2,499 a month.

68% of households in the typical Marin County ZIP own their home (statewide ZIP median 64%). 61% of adults hold a bachelor's degree, far above the 31% statewide median. The median poverty rate is 6.8%, below the 10.8% statewide ZIP median. Overall density is about 475 residents per square mile across 617 square miles of ZIP land area.