What is the population of Marin County, CA?
Marin County in California has a population of 258,765, per Census ACS 5-Year estimates. The median household income is $142,785 and the median age is 47.3.
Context
Counties are the primary administrative subdivisions of states and a stable unit for tracking population. Marin County's population reflects everyone within county lines, including residents of incorporated cities and unincorporated areas.
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Marin County in California has a population of 258,765, per Census ACS 5-Year estimates. The median household income is $142,785 and the median age is 47.3.