Is Marin County the best California county for your business?

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Now you can skip hours of internet research and jump straight to getting answers with our meaningful at-a-glance Demographics Spreadsheet Report. With the most current & most popular demographic data, it's the perfect starting point for your research about Marin County and the rest of California.

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We know Marin County Demographics, just keep scrolling...

Marin County Population

All Marin County population data above are from the US Census Bureau.

The population data for Marin County are from the Census' American Community Survey 2018 5-year estimates and the Census' 2019 Population Estimates. The demographic data for Butte County, Contra Costa County, San Francisco County, and Yolo County are the most current, comparable demographics available from the US Census Bureau, are from the American Community Survey 2018 5-year estimates, and were downloaded on 19 December 2019. Check out our FAQ section for more details.

Marin County Demographics Summary

population icon Population

With 258,826 people, Marin County is the 26th most populated county in the state of California out of 58 counties. But watch out, Marin County, because Butte County with 219,186 people and Yolo County with 220,500 people are right behind you.

race icon Race & Ethnicity

The largest Marin County racial/ethnic groups are White (71.4%) followed by Hispanic (15.9%) and Asian (5.7%).

income icon Median Income

In 2018, the median household income of Marin County residents was $110,217. Marin County households made slightly more than Contra Costa County households ($93,712) and San Francisco County households ($104,552) . However, 7.6% of Marin County residents live in poverty.

age icon Median Age

The median age for Marin County residents is 46.5 years young.


86% of people CANNOT find the data they're looking for on the US Census Bureau website. Source: Nielsen Norman Group

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"Your starter report certainly saved me a considerable amount of time. I am just too busy to garner this needed data any other way. It truly would have taken hours of an employee's time or my own to get this much information. I was fortunate to find a company that had all the demographics that I needed and at a very reasonable price."
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"My supervisor had assigned me the task of getting population data for the county for our required county education strategic plan. I had some information from Kids Count but need race, gender, age, etc. and the government census site was shutdown. I was so surprised to get a report within seconds and it had lots of charts and graphs that my supervisor liked."
—Jean Hinzman.

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