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DeKalb County, IN Demographics

DeKalb County, IN is the 36th most populous of 92 counties in Indiana, with 43,265 residents across 363 square miles. That is about 119 people per square mile.

At the 2020 census

Population 43,265
Land area 363 sq mi
Density 119 / sq mi

Data: 2020 Census · American Community Survey 2024

How DeKalb 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: DeKalb County, IN

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

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

Census tracts in DeKalb County, IN

Name Population Sq mi Per sq mi
Census Tract 204 7,842 13.6 575
Census Tract 205 5,987 4.0 1,500
Census Tract 206.02 4,685 12.2 383
Census Tract 201 4,506 118.2 38
Census Tract 208 4,377 69.0 63
Census Tract 202 4,346 42.1 103
Census Tract 207 4,254 40.6 105
Census Tract 203 4,173 51.1 82
Census Tract 206.01 3,095 12.0 258

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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 →