Mariposa County, California

Mariposa County: County in California, United States


Mariposa County is a county located in the U.S. state of California. As of the 2010 census, the population was 18,251 and a population density of 5 people per km². After 10 years in 2020 county had an estimated population of 17,160 inhabitants. Its county seat is Mariposa. The county was created 173 years ago in 1850.

Mariposa County locator map
Location of Mariposa County on California map.

Quick Facts about Mariposa County

Population : 17,160 (2020)
Country : United States of America
State : California (United States)
Different from : Maricopa County
Area : 3789 km2
Water as percent of area : 0.82%
Land as percent of area : 99.18%
Named for : Mariposa Creek
Altitude : 3,081 feet / 939 meters
Capital : Mariposa
Establishment : January 01, 1850
Time Zone : America/Los_Angeles
Local time : 22:21:29 (22nd September 2023)
Density : 5 Pop. per km² as of 2020
Population growth : -6.36% (2010-2020)
Weather : 48℉ Mostly Clear 7-days weather
Mariposa Courthouse CA image
Mariposa Courthouse CA
Mariposa Courthouse CA image


Mariposa County is located at 37°34'53"N 119°54'20"W (37.5815200, -119.9055200). It has 4 neighbors: Madera County, Merced County, Stanislaus County and Tuolumne County.

Mariposa County map

The largest city of Mariposa County is Bootjack with a population of 960. . See all Mariposa County cities & populated places.

Mariposa County Populated Places

Cities, towns, neighborhoods & other populated places in Mariposa County.

City Name Population Title
Mariposa 1,373 Census-designated place in and the county seat of Mariposa County, California
Bootjack 960 Unincorporated community in California


Mariposa County forecast: Mostly clear, with a low around 48. Northeast wind 5 to 15 mph. more

Mariposa County has 4 neighbours.

  • Mariposa


According to census records, the population of Mariposa County decreased by 6.36% in 10 years.

Year Population % Change Method
2010 18,251 - census
2011 18,170 -0.45% estimation process
2012 17,881 -1.62% estimation process
2013 17,809 -0.4% estimation process
2014 17,714 -0.54% estimation process
2015 17,622 -0.52% estimation process
2016 17,456 -0.95% estimation process
2017 17,414 -0.24% estimation process
2018 17,405 -0.05% estimation process
2019 17,203 -1.17% estimation process
2020 17,160 -0.25% estimation process

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California Other Counties (more counties)

County Name Population Title
Los Angeles County 9,943,046 County in California, United States of America
Los Angeles 3,970,219 The second most populous city in the United States and the center of the Los Angeles metropolitan area.
San Diego County 3,332,427 San Diego County, founded in 1850, is one of 58 counties in the US state of California.
Orange County 3,166,857 County in California, United States
Riverside County 2,489,188 County in California, United States
San Bernardino County 2,189,183 County in California, United States
Santa Clara County 1,907,105 County in California, United States
Alameda County 1,662,323 County in California, United States
Sacramento County 1,559,146 County in California, United States
San Diego 1,422,420 The eighth most populous city in the United States and the center of the San Diego metropolitan area.
Laguna 1,370,232 A city located in Orange County, California.
Contra Costa County 1,152,333 County in California, United States
San Jose 1,013,616 The tenth most populous city in the United States and the center of the San Jose metropolitan area.
Fresno County 1,000,918 County in California, United States
Kern County 901,362
San Francisco County 866,606 County, coextensive with the city of San Francisco, California, United States