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Jefferson County, AL Demographics

Jefferson County, AL is the most populous of 67 counties in Alabama, with 674,713 residents across 1,112 square miles. That is about 607 people per square mile.

At the 2020 census

Population 674,713
Land area 1,112 sq mi
Density 607 / sq mi

Data: 2020 Census · American Community Survey 2024

How Jefferson 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: Jefferson County, AL

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

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

Census tracts in Jefferson County, AL

Name Population Sq mi Per sq mi
Census Tract 111.14 8,019 15.6 515
Census Tract 127.03 7,347 11.9 616
Census Tract 108.01 7,112 1.9 3,658
Census Tract 144.14 7,006 3.4 2,042
Census Tract 129.11 6,757 4.8 1,408
Census Tract 143.03 6,557 14.8 444
Census Tract 108.03 6,514 3.3 1,982
Census Tract 108.06 6,486 4.8 1,348
Census Tract 142.08 6,433 6.5 994
Census Tract 142.07 6,349 13.2 482
Census Tract 117.08 6,297 7.8 809
Census Tract 144.06 6,219 2.8 2,261
Census Tract 115 6,035 35.5 170
Census Tract 111.17 6,020 8.2 731
Census Tract 144.04 5,918 2.1 2,844
Census Tract 111.10 5,813 15.5 374
Census Tract 111.15 5,736 8.1 709
Census Tract 100.01 5,681 4.3 1,328
Census Tract 120.04 5,670 9.5 595
Census Tract 59.05 5,577 2.1 2,633
Census Tract 144.10 5,568 4.9 1,132
Census Tract 112.06 5,413 20.5 263
Census Tract 107.04 5,279 1.2 4,511
Census Tract 142.06 5,256 17.9 294
Census Tract 111.08 5,172 3.5 1,461
Census Tract 100.02 5,155 3.4 1,497
Census Tract 129.07 5,151 2.8 1,853
Census Tract 59.03 5,149 3.1 1,676
Census Tract 59.10 5,109 2.8 1,817
Census Tract 112.07 5,102 2.1 2,439
Census Tract 141.05 5,057 4.9 1,042
Census Tract 56 5,053 1.6 3,110
Census Tract 117.09 4,956 7.1 698
Census Tract 118.03 4,902 1.5 3,220
Census Tract 107.02 4,898 1.2 4,052
Census Tract 107.06 4,893 2.9 1,698
Census Tract 129.05 4,767 3.0 1,613
Census Tract 109 4,719 2.1 2,202
Census Tract 129.10 4,703 2.5 1,884
Census Tract 142.09 4,612 6.6 696
Census Tract 38.02 4,607 1.2 3,693
Census Tract 106.04 4,595 1.5 3,136
Census Tract 112.08 4,559 2.9 1,568
Census Tract 143.04 4,504 6.9 651
Census Tract 37 4,423 0.9 4,740
Census Tract 129.13 4,421 1.2 3,748
Census Tract 11 4,420 3.9 1,129
Census Tract 134 4,420 1.9 2,298
Census Tract 36 4,359 0.9 4,840
Census Tract 129.08 4,352 1.5 2,957
Census Tract 117.04 4,343 26.0 167
Census Tract 144.12 4,329 1.8 2,351
Census Tract 121.03 4,277 11.2 382
Census Tract 111.09 4,273 6.6 648
Census Tract 120.01 4,249 14.1 302
Census Tract 144.08 4,235 1.3 3,357
Census Tract 144.05 4,226 1.5 2,903
Census Tract 114.02 4,178 33.1 126
Census Tract 125 4,160 11.9 351
Census Tract 107.05 4,125 0.8 4,969
Census Tract 127.01 4,081 10.3 398
Census Tract 122 4,022 44.5 90
Census Tract 111.13 4,006 3.8 1,059
Census Tract 111.12 3,987 1.6 2,570
Census Tract 129.16 3,948 1.8 2,244
Census Tract 144.15 3,918 3.6 1,090
Census Tract 123.02 3,918 65.2 60
Census Tract 113.03 3,913 11.9 329
Census Tract 123.07 3,900 4.3 911
Census Tract 131 3,870 2.3 1,660
Census Tract 103.02 3,870 2.0 1,935
Census Tract 140.01 3,864 18.3 211
Census Tract 116 3,863 40.8 95
Census Tract 117.07 3,825 3.8 1,005
Census Tract 141.04 3,820 17.6 217
Census Tract 113.04 3,748 8.0 471
Census Tract 128.04 3,747 1.8 2,133
Census Tract 117.10 3,721 8.4 442
Census Tract 112.10 3,710 3.5 1,067
Census Tract 124.01 3,660 1.8 1,995
Census Tract 118.06 3,651 1.1 3,177
Census Tract 59.08 3,644 1.1 3,212
Census Tract 110.04 3,643 5.7 643
Census Tract 108.02 3,633 2.2 1,687
Census Tract 123.06 3,581 1.8 2,001
Census Tract 129.21 3,572 1.3 2,719
Census Tract 113.01 3,562 24.2 147
Census Tract 104.01 3,556 1.5 2,327
Census Tract 49.02 3,555 0.4 8,137
Census Tract 118.05 3,552 1.1 3,189
Census Tract 38.03 3,547 1.0 3,393
Census Tract 140.02 3,510 14.2 247
Census Tract 23.06 3,489 1.8 1,908
Census Tract 53.02 3,484 1.9 1,796
Census Tract 47.01 3,482 0.4 7,974
Census Tract 20 3,478 1.4 2,476
Census Tract 45.02 3,423 1.1 3,000
Census Tract 124.03 3,414 11.9 286
Census Tract 50 3,374 0.9 3,609
Census Tract 52 3,365 1.8 1,897

Showing the 100 most populous of 189 — the rest are shown on the map.

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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 →