ZIP Code 94964
About San Quentin
San Quentin is a small unincorporated community in Marin County, California, United States. It is located west of Point San Quentin, at an elevation of 30 feet.
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Area Profile
US Census (ACS 5-year · Gazetteer)
2,115
population
4,638
people / sq mi
48.0
median age
147
housing units
110
households
0.5
land area (sq mi)