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Mariposa County, CA Demographics

Mariposa County, CA is the 53rd most populous of 58 counties in California, with 17,129 residents across 1,449 square miles. That is about 12 people per square mile.

At the 2020 census

Population 17,129
Land area 1,449 sq mi
Density 12 / sq mi

Data: 2020 Census · American Community Survey 2024

How Mariposa County compares to the US

We're computing this county's comparison table — check back shortly. Population, land area, and density above are already exact.

Central Location: Mariposa County, CA

Measured from the county's main population center using 2020 census blocks.

We're computing the drive-time and radius areas around Mariposa County, CA — check back shortly. Meanwhile you can drop a pin anywhere in the radius tool.

Census tracts in Mariposa County, CA

Name Population Sq mi Per sq mi
Census Tract 3.01 3,819 79.4 48
Census Tract 1.01 3,729 174.2 21
Census Tract 2 3,206 288.0 11
Census Tract 3.02 2,814 203.3 14
Census Tract 1.02 2,619 310.4 8
Census Tract 4 944 393.5 2

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About this page

This page shows demographics for a US county from the 2020 census and the American Community Survey: population, land area, density, urban share, and how the county compares to national averages for income, housing, age, and more.

Counties subdivide into census tracts, listed below with their populations. The drive-time and radius tables measure the population around the county's main population center.

Read how BlockAtlas computes population within an area →