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Allen County, IN Demographics

Allen County, IN is the 3rd most populous of 92 counties in Indiana, with 385,410 residents across 657 square miles. That is about 586 people per square mile.

At the 2020 census

Population 385,410
Land area 657 sq mi
Density 586 / sq mi

Data: 2020 Census · American Community Survey 2024

How Allen 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: Allen County, IN

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

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

Census tracts in Allen County, IN

Name Population Sq mi Per sq mi
Census Tract 116.08 9,270 6.7 1,375
Census Tract 103.04 8,338 4.3 1,930
Census Tract 103.06 8,233 12.2 676
Census Tract 103.08 7,841 3.4 2,287
Census Tract 103.05 7,811 13.3 587
Census Tract 116.09 7,718 10.8 717
Census Tract 102.01 7,467 16.0 467
Census Tract 36 6,678 2.6 2,586
Census Tract 109 6,538 63.6 103
Census Tract 116.03 6,358 2.8 2,254
Census Tract 102.02 6,217 18.5 336
Census Tract 23 5,751 1.0 5,598
Census Tract 108.11 5,729 2.9 1,985
Census Tract 116.07 5,687 2.6 2,211
Census Tract 108.09 5,634 2.7 2,084
Census Tract 113.02 5,633 1.7 3,310
Census Tract 108.16 5,598 2.6 2,160
Census Tract 108.15 5,583 6.3 888
Census Tract 41.03 5,524 0.8 6,514
Census Tract 108.03 5,464 2.0 2,704
Census Tract 32 5,459 1.4 3,816
Census Tract 103.07 5,369 2.3 2,369
Census Tract 108.08 5,348 2.2 2,378
Census Tract 107.07 5,318 3.5 1,504
Census Tract 113.04 5,296 10.0 532
Census Tract 116.06 5,000 2.5 1,980
Census Tract 107.05 4,992 1.8 2,802
Census Tract 101 4,953 48.5 102
Census Tract 108.21 4,860 1.4 3,550
Census Tract 107.06 4,833 2.8 1,739
Census Tract 108.19 4,699 1.2 4,014
Census Tract 106.02 4,560 6.3 720
Census Tract 108.07 4,521 1.8 2,452
Census Tract 108.12 4,397 3.6 1,205
Census Tract 116.04 4,356 1.6 2,658
Census Tract 34 4,335 0.9 4,903
Census Tract 106.01 4,269 6.8 629
Census Tract 117.01 4,247 34.5 123
Census Tract 22 4,246 2.9 1,478
Census Tract 35 4,229 1.0 4,214
Census Tract 104 4,199 36.5 115
Census Tract 33.04 4,143 1.8 2,273
Census Tract 108.17 4,127 1.1 3,665
Census Tract 108.13 4,065 3.9 1,054
Census Tract 8 4,044 1.0 3,924
Census Tract 108.04 3,975 1.1 3,505
Census Tract 30 3,953 0.8 4,864
Census Tract 115.01 3,883 3.8 1,010
Census Tract 118.01 3,838 34.7 110
Census Tract 116.05 3,693 6.2 599
Census Tract 40 3,513 0.9 4,011
Census Tract 26 3,474 0.4 7,981
Census Tract 39.01 3,463 1.5 2,235
Census Tract 112.04 3,452 2.7 1,273
Census Tract 3 3,396 0.5 6,636
Census Tract 9 3,350 0.8 4,256
Census Tract 112.02 3,337 3.0 1,102
Census Tract 112.05 3,297 1.2 2,746
Census Tract 44 3,291 0.7 4,475
Census Tract 25 3,231 0.5 7,007
Census Tract 7.01 3,152 0.6 5,452
Census Tract 38 3,130 1.4 2,196
Census Tract 20 3,105 0.6 5,507
Census Tract 31 3,076 0.6 4,834
Census Tract 117.02 2,964 35.0 85
Census Tract 39.02 2,914 1.7 1,753
Census Tract 5 2,853 0.8 3,633
Census Tract 105 2,789 35.7 78
Census Tract 106.04 2,768 2.0 1,391
Census Tract 111 2,736 1.5 1,777
Census Tract 33.01 2,728 0.7 3,812
Census Tract 37 2,727 1.5 1,760
Census Tract 41.01 2,708 1.4 1,916
Census Tract 115.02 2,663 9.4 282
Census Tract 17 2,625 0.6 4,351
Census Tract 29 2,561 0.6 4,126
Census Tract 110 2,560 62.0 41
Census Tract 4 2,559 1.2 2,117
Census Tract 28 2,488 0.4 6,689
Census Tract 7.04 2,432 1.5 1,655
Census Tract 1 2,407 0.7 3,294
Census Tract 43 2,358 1.4 1,627
Census Tract 21 2,192 0.5 4,751
Census Tract 113.03 2,141 3.0 725
Census Tract 112.01 2,064 3.7 563
Census Tract 16 2,021 1.6 1,254
Census Tract 13 1,972 0.6 3,273
Census Tract 119 1,960 24.7 79
Census Tract 6 1,885 0.3 5,696
Census Tract 106.03 1,778 2.9 608
Census Tract 118.02 1,659 36.6 45
Census Tract 11 1,481 0.3 4,398
Census Tract 12 1,473 0.4 3,618
Census Tract 10 1,181 0.8 1,505
Census Tract 9800.01 1,084 1.5 715
Census Tract 9800.02 133 1.5 88

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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 →