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Hamilton County, IN Demographics

Hamilton County, IN is the 4th most populous of 92 counties in Indiana, with 347,467 residents across 394 square miles. That is about 881 people per square mile.

At the 2020 census

Population 347,467
Land area 394 sq mi
Density 881 / sq mi

Data: 2020 Census · American Community Survey 2024

How Hamilton 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: Hamilton County, IN

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

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

Census tracts in Hamilton County, IN

Name Population Sq mi Per sq mi
Census Tract 1108.13 13,901 7.1 1,949
Census Tract 1108.14 11,281 9.9 1,143
Census Tract 1105.13 11,255 7.7 1,454
Census Tract 1105.16 10,257 10.8 952
Census Tract 1105.15 9,520 5.5 1,725
Census Tract 1103.01 9,332 2.9 3,184
Census Tract 1101.01 9,078 7.5 1,204
Census Tract 1108.15 7,888 2.6 2,987
Census Tract 1110.09 7,816 5.9 1,331
Census Tract 1108.05 7,793 3.0 2,592
Census Tract 1108.18 7,656 4.7 1,612
Census Tract 1108.17 7,395 1.6 4,591
Census Tract 1105.05 7,344 9.4 783
Census Tract 1109.11 7,308 3.0 2,402
Census Tract 1110.10 7,044 5.0 1,419
Census Tract 1109.10 7,040 3.0 2,322
Census Tract 1108.10 6,832 3.4 2,023
Census Tract 1105.17 6,811 5.8 1,169
Census Tract 1109.06 6,774 2.2 3,081
Census Tract 1108.12 6,686 2.9 2,275
Census Tract 1102.02 6,632 16.5 401
Census Tract 1108.07 6,481 3.6 1,825
Census Tract 1109.09 6,468 3.0 2,171
Census Tract 1104.06 6,395 2.0 3,234
Census Tract 1108.19 6,086 1.7 3,493
Census Tract 1103.02 5,716 24.0 238
Census Tract 1105.11 5,688 3.1 1,840
Census Tract 1108.22 5,632 2.3 2,398
Census Tract 1109.12 5,547 3.0 1,873
Census Tract 1111.04 5,520 2.4 2,304
Census Tract 1105.09 5,469 4.5 1,225
Census Tract 1109.07 5,358 2.1 2,523
Census Tract 1104.04 5,309 1.9 2,776
Census Tract 1103.03 5,218 48.3 108
Census Tract 1105.18 5,151 3.9 1,335
Census Tract 1104.05 5,018 3.4 1,489
Census Tract 1108.21 5,000 1.1 4,403
Census Tract 1105.12 4,863 2.2 2,176
Census Tract 1110.03 4,726 1.9 2,487
Census Tract 1109.04 4,652 1.7 2,733
Census Tract 1110.12 4,564 1.3 3,570
Census Tract 1108.11 4,492 2.1 2,135
Census Tract 1104.01 4,443 10.3 431
Census Tract 1108.16 4,346 1.2 3,584
Census Tract 1101.02 4,271 83.2 51
Census Tract 1102.01 4,231 38.3 111
Census Tract 1106 4,175 1.2 3,353
Census Tract 1110.06 4,171 2.4 1,736
Census Tract 1108.20 4,146 1.5 2,743
Census Tract 1110.07 4,030 1.2 3,467
Census Tract 1111.03 4,013 4.4 922
Census Tract 1111.01 3,852 3.0 1,280
Census Tract 1109.05 3,819 1.4 2,700
Census Tract 1107 3,402 1.5 2,341
Census Tract 1110.11 3,377 1.0 3,232
Census Tract 1105.14 3,181 2.4 1,311
Census Tract 1110.04 3,014 1.3 2,317

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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 →