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World Population Review
Marin County, California Population 2021
Marin County, California's estimated population is 257,154 with a growth rate of -0.32% in the past year according to the most recent United States census data. Marin County, California is the 27th largest county in California. The 2010 Population was 252,904 and has seen a growth of 1.68% since this time.
Note: 2020 and 2021 data is projected
| Year | Population | Growth | Growth Rate |
|---|---|---|---|
| 2021 | 257,154 | -836 | -0.32% |
| 2020 | 257,990 | -836 | -0.32% |
| 2019 | 258,826 | -836 | -0.32% |
| 2018 | 259,662 | -87 | -0.03% |
| 2017 | 259,749 | -813 | -0.31% |
| 2016 | 260,562 | -354 | -0.14% |
| 2015 | 260,916 | 557 | 0.21% |
| 2014 | 260,359 | 1,950 | 0.75% |
| 2013 | 258,409 | 2,348 | 0.92% |
| 2012 | 256,061 | 685 | 0.27% |
| 2011 | 255,376 | 2,472 | 0.98% |
| 2010 | 252,904 | 22,808 | 9.91% |
| 1990 | 230,096 | 7,528 | 3.38% |
| 1980 | 222,568 | 16,530 | 8.02% |
| 1970 | 206,038 | 59,218 | 40.33% |
| 1960 | 146,820 | 61,201 | 71.48% |
| 1950 | 85,619 | 32,712 | 61.83% |
| 1940 | 52,907 | 11,259 | 27.03% |
| 1930 | 41,648 | 14,306 | 52.32% |
| 1920 | 27,342 | 2,228 | 8.87% |
| 1910 | 25,114 | 9,412 | 59.94% |
| 1900 | 15,702 | 2,630 | 20.12% |
| 1890 | 13,072 | 1,748 | 15.44% |
| 1880 | 11,324 | 4,421 | 64.04% |
| 1870 | 6,903 | 3,569 | 107.05% |
| 1860 | 3,334 | 3,011 | 932.20% |
| 1850 | 323 | 0.00% |
2021 Growth Rate
-0.32%
County Website
State
County Seat
Lat./Long.
2010 Population
252,904
Growth Since 2010
1.68%
Marin County, California Population Growth
| Race | Population | Percentage |
|---|---|---|
| White | 202,313 | 77.83% |
| Some Other Race | 22,258 | 8.56% |
| Asian | 15,367 | 5.91% |
| Two or More Races | 12,756 | 4.91% |
| Black or African American | 5,767 | 2.22% |
| American Indian and Alaska Native | 911 | 0.35% |
| Native Hawaiian and Other Pacific Islander | 571 | 0.22% |
Marin County, California Population by Race
Marin County, California Population Pyramid $2021
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Marin County, California Population by Age
Marin County, California Households and Families
| Type | Count | Average Size | Owned |
|---|---|---|---|
| All | 105,432 | 2.4 | 63.7 |
| Married | 54,174 | 3.02 | 76 |
| Non Family | 39,380 | 1.29 | 50.8 |
| Female | 8,102 | 3.24 | 50.8 |
| Male | 3,776 | 3.2 | 48.9 |
2.96
Average Family Size
2.4
Average Household Size
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Marin County, California Households by Type
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| Education Attained | Count | Percentage |
|---|---|---|
| Less Than 9th Grade | 7,512 | 3.95% |
| 9th to 12th Grade | 5,247 | 2.76% |
| High School Graduate | 20,018 | 10.51% |
| Some College | 32,480 | 17.06% |
| Associates Degree | 11,872 | 6.24% |
| Bachelors Degree | 65,371 | 34.33% |
| Graduate Degree | 47,903 | 25.16% |
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Marin County, California Educational Attainment by Sex (over 25)
Marin County, California Educational Attainment by Race
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| Race | Total | High School | Bachelors |
|---|---|---|---|
| White | 143,886 | 140,750 | 95,647 |
| Hispanic | 24,111 | 16,165 | 5,760 |
| Asian | 12,273 | 11,388 | 7,632 |
| Other Race | 12,159 | 6,877 | 1,609 |
| 2+ Races | 6,151 | 5,954 | 3,245 |
| Black | 4,247 | 3,568 | 1,219 |
| Native American | 650 | 505 | 47 |
| Islander | 322 | 182 | 12 |
The highest rate of high school graduation is among white people with a rate of 97.82%.
The highest rate of bachelors degrees is among white people with a rate of 66.47%.
Marin County, California Educational Attainment by Race
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$64,038
Average Earnings
$80,135
Average Male
$53,250
Average Female
Marin County, California Earnings by Educational Attainment
Marin County, California Language by Age
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Marin County, California Language
78.12% of Marin County, California residents speak only English, while 21.88% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 11.90% of the population.
Marin County, California Language
Marin County, California Poverty by Race
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| Name | Total | In Poverty | Poverty Rate |
|---|---|---|---|
| White | 182,823 | 8,732 | 4.78% |
| Hispanic | 39,574 | 6,691 | 16.91% |
| Other | 20,879 | 4,834 | 23.15% |
| Asian | 14,859 | 1,221 | 8.22% |
| Multiple | 12,199 | 799 | 6.55% |
| Black | 4,746 | 798 | 16.81% |
| Islander | 507 | 330 | 65.09% |
| Native | 823 | 182 | 22.11% |
7.23%
Overall Poverty Rate
6.36%
Male Poverty Rate
8.03%
Female Poverty Rate
Poverty in Marin County, California
The race most likely to be in poverty in Marin County, California is Islander, with 65.09% below the poverty level.
The race least likely to be in poverty in Marin County, California is White, with 4.78% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 1.46%. Among those working part-time, it was 7.98%, and for those that did not work, the poverty rate was 13.41%.
Marin County, California Poverty
Marin County, California Poverty Rate by Education
Marin County, California Marital Status
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Marriage Rates
53.0%
Overall Marriage Rate
56.3%
Male Marriage Rate
49.8%
Female Marriage Rate
Marin County, California Married by Age and Sex
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Marin County, California Marriage
The age group where males are most likely to be married is 45-54, while the female age group most likely to be married is 35-44.
Marin County, California Marital Status by Race
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Marin County, California Marital Status
Marin County, California Veterans by War
Marin County, California Veterans by Age
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| Name | Veterans | % of Total |
|---|---|---|
| White | 8,954 | 5.40% |
| Hispanic | 585 | 2.08% |
| Black | 430 | 8.85% |
| Asian | 372 | 2.77% |
| 2+ Races | 360 | 4.93% |
| Other Race | 321 | 2.19% |
| Native American | 75 | 10.96% |
| Islander | 4 | 1.21% |
Marin County, California Veterans by Race
Marin County, California Veterans by Education
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2.64%
Veteran Poverty Rate
27.52%
Veteran Disability Rate
Marin County, California Veterans by Education
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63.7%
Labor Force Participation
61.3%
Employment Rate
3.7%
Unemployment Rate
Marin County, California Employment by Age
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Marin County, California Employment by Race
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Marin County, California Employment by Education
Origin of Non-Citizens
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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
Origin of Naturalized Citizens
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81.88%
Native Born
18.12%
Foreign Born
9.36%
Non Citizen
8.76%
Naturalized
Place of Birth
81.88% of Marin County, California residents were born in the United States, with 50.07% having been born in California. 9.36% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.
Marin County, California Place of Birth
- US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
- Population of States and Counties of the United States: 1790 - 1990