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Spencer County, IN Demographics

Spencer County, IN is the 74th most populous of 92 counties in Indiana, with 19,810 residents across 397 square miles. That is about 50 people per square mile.

At the 2020 census

Population 19,810
Land area 397 sq mi
Density 50 / sq mi

Data: 2020 Census · American Community Survey 2024

How Spencer 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: Spencer County, IN

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

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

Census tracts in Spencer County, IN

Name Population Sq mi Per sq mi
Census Tract 9527.01 4,500 68.2 66
Census Tract 9530 3,870 72.8 53
Census Tract 9527.02 3,126 35.9 87
Census Tract 9528 3,058 111.3 27
Census Tract 9531 2,839 28.6 99
Census Tract 9529 2,417 80.1 30

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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 →