Mariposa County, California Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 53rd-largest in California
The population of Mariposa County, California is 17,060 as of the 2023 American Community Survey, making it the 53rd-largest county in California. The median household income is $65,378, the median home value is $358,000, and the median age is 51.6.
The population of Mariposa County has declined 6.9% since 2010 (18,302 → 17,048), a -0.51% annualized rate.
17,060
Population
-0.51%
Annual growth
12
People / sq mi
$65,378
Median Income
$358,000
Median Home Value
Mariposa County covers 1,449 sq mi of land at 11.8 people per square mile.
About Mariposa County, CA
Mariposa County is a county in California with a population of 17,060. It ranks #53 among counties in California by population. The median age is 51.6, older than the national median. The population is 51.5% male and 48.5% female.
The median household income in Mariposa County is $65,378, below the US median of $74,580. 9.5% of residents live below the federal poverty level. Home values sit at a median of $358,000, with monthly rent averaging $1,268. The homeownership rate of 74.7% is higher than the national rate of 64.8%.
Educational attainment in Mariposa County reflects 30.9% of adults 25 and older holding a bachelor's degree or higher, below the national average of 34.3%. Roughly 14.2% of workers primarily work from home, similar to the national work-from-home rate of 14.2%. The average commute is 33.7 minutes each way.
Mariposa County Population History (2010-2024)
The county of Mariposa County had a population of 18,302 in 2010 and 17,048 in 2024, a -6.9% growth over 14 years. The peak was 18,302 in 2010. Average annual growth rate: -0.50%.
17,048
Population (2024)
18,302
Population (2010)
18,302
Peak (2010)
-0.50%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 18,302 |
| 2011 | 18,199 |
| 2012 | 17,912 |
| 2013 | 17,840 |
| 2014 | 17,745 |
| 2015 | 17,653 |
| 2016 | 17,498 |
| 2017 | 17,461 |
| 2018 | 17,361 |
| 2019 | 17,117 |
| 2020 | 17,133 |
| 2021 | 17,136 |
| 2022 | 17,095 |
| 2023 | 16,996 |
| 2024 | 17,048 |
Race & Ethnicity
| White | 79.7% |
| Black or African American | 1.3% |
| Asian | 0.1% |
| Hispanic or Latino (any race) | 6.2% |
| Two or More Races | 0.0% |
Age & Sex
51.6
Median Age
48.5%
Female
51.5%
Male
29.4%
Age 65+
Age Distribution
Children (under 15): 13.7% · Seniors (65+): 29.4%
Income & Poverty
| Median household income | $65,378$-30,956 vs state |
| Mean household income | $86,394 |
| Per-capita income | $39,798 |
| Poverty rate | 9.5%+1.1% vs state |
| Unemployment rate | 3.8% |
| Employment-to-population | 50.8% |
Top Industries by Employment
The largest employment sector in Mariposa County is professional & business services, accounting for 21.7% of workers.
How residents commute
2.1%
Drive alone
6.8%
Carpool
59.7%
Public transit
14.2%
Work from home
33.7 min
Avg commute
Housing
$358,000$-337,400 vs state
Median home value
$1,268
Median rent
74.7%
Homeownership rate
9,796
Total housing units
76.7%
Occupied
23.3%
Vacant
25.3%
Renter-occupied
Social & access
93.5%
With health insurance
90.9%
With broadband internet
26.0%
Foreign-born
9.5%
Veterans (18+)
18.4%
With a disability
89.2%
Speak language other than English at home
Education
90.5%
High School+
30.9%
Bachelor's+
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Part of California
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County rankings
Frequently Asked Questions
Mariposa County, California has a population of 17,060 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 53rd-largest county in California. Population density is 12 people per square mile.
The population of Mariposa County has declined 6.9% since 2010 (18,302 → 17,048), a -0.51% annualized rate.
The median household income in Mariposa County, California is $65,378, with mean (average) household income of $86,394 and per-capita income of $39,798. 9.5% of residents live below the federal poverty level.
In Mariposa County, the largest racial and ethnic groups are White (79.7%), Hispanic or Latino (6.2%), Black or African American (1.3%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Mariposa County, California is 51.6 years. Residents are 48.5% female and 51.5% male.
The median home value in Mariposa County is $358,000 and median monthly rent is $1,268. 74.7% of occupied housing units are owner-occupied. The county has 9,796 total housing units, 23.3% of which are vacant.
The largest employment sector in Mariposa County, California is professional, scientific, and management services, employing 21.7% of workers. The unemployment rate is 3.8%.
Los Angeles is among the largest cities associated with Mariposa County, California, with a population of 3,857,897.
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.