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Jefferson County, KY Demographics

Jefferson County, KY is the most populous of 120 counties in Kentucky, with 782,969 residents across 381 square miles. That is about 2,056 people per square mile.

At the 2020 census

Population 782,969
Land area 381 sq mi
Density 2,056 / 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, KY

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

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

Census tracts in Jefferson County, KY

Name Population Sq mi Per sq mi
Census Tract 116.05 7,534 5.5 1,361
Census Tract 113.02 7,086 1.3 5,290
Census Tract 115.08 6,773 2.8 2,424
Census Tract 75.01 6,750 4.9 1,384
Census Tract 111.10 6,570 1.6 4,028
Census Tract 117.11 6,490 2.0 3,175
Census Tract 117.09 6,475 9.7 668
Census Tract 103.14 6,474 3.6 1,811
Census Tract 110.03 6,449 1.2 5,225
Census Tract 117.07 6,383 2.4 2,703
Census Tract 122.03 6,316 4.4 1,422
Census Tract 103.13 6,246 4.6 1,345
Census Tract 117.08 6,239 3.4 1,840
Census Tract 104.06 6,226 5.1 1,221
Census Tract 115.19 6,168 2.6 2,377
Census Tract 107.02 6,097 1.8 3,462
Census Tract 124.06 6,034 1.2 4,869
Census Tract 103.21 5,965 5.6 1,075
Census Tract 114.05 5,945 1.0 6,246
Census Tract 127.03 5,855 5.9 996
Census Tract 121.09 5,723 1.5 3,715
Census Tract 115.06 5,689 1.5 3,878
Census Tract 103.18 5,654 2.0 2,820
Census Tract 75.02 5,602 8.0 697
Census Tract 115.17 5,560 1.9 2,865
Census Tract 126.04 5,560 1.5 3,636
Census Tract 115.20 5,543 3.0 1,859
Census Tract 123.02 5,380 1.9 2,895
Census Tract 111.14 5,341 1.5 3,568
Census Tract 111.11 5,328 1.4 3,721
Census Tract 107.01 5,282 3.0 1,773
Census Tract 121.07 5,271 3.7 1,415
Census Tract 116.03 5,257 13.6 388
Census Tract 114.06 5,241 1.7 3,032
Census Tract 125.02 5,224 1.9 2,797
Census Tract 91.06 5,208 1.1 4,666
Census Tract 71.02 5,182 0.8 6,529
Census Tract 103.24 5,141 1.0 5,247
Census Tract 121.05 5,093 1.7 3,033
Census Tract 109.01 5,021 1.0 4,859
Census Tract 124.07 4,992 1.7 2,862
Census Tract 93 4,989 1.9 2,682
Census Tract 103.16 4,978 3.1 1,599
Census Tract 103.17 4,938 2.4 2,082
Census Tract 122.06 4,919 1.1 4,424
Census Tract 115.15 4,849 1.4 3,477
Census Tract 117.12 4,795 2.0 2,384
Census Tract 36 4,771 0.6 7,498
Census Tract 96 4,735 1.1 4,192
Census Tract 100.01 4,717 1.8 2,599
Census Tract 122.04 4,707 2.8 1,701
Census Tract 103.09 4,703 1.9 2,495
Census Tract 89 4,691 0.8 6,205
Census Tract 104.03 4,532 4.4 1,040
Census Tract 119.07 4,505 1.3 3,341
Census Tract 104.07 4,473 1.9 2,350
Census Tract 100.04 4,472 0.7 6,055
Census Tract 104.05 4,467 0.9 4,711
Census Tract 103.19 4,453 1.4 3,140
Census Tract 115.13 4,434 1.3 3,368
Census Tract 44 4,368 0.8 5,771
Census Tract 100.05 4,367 1.2 3,641
Census Tract 4 4,360 1.1 3,934
Census Tract 115.21 4,349 1.0 4,181
Census Tract 43.01 4,345 0.6 6,997
Census Tract 100.08 4,301 1.7 2,492
Census Tract 127.01 4,284 3.7 1,146
Census Tract 115.09 4,204 1.3 3,138
Census Tract 124.10 4,194 0.8 5,143
Census Tract 112.02 4,193 0.4 9,584
Census Tract 87 4,188 3.2 1,300
Census Tract 101.02 4,172 2.3 1,825
Census Tract 125.03 4,157 1.0 4,282
Census Tract 100.07 4,128 1.6 2,637
Census Tract 119.09 4,119 1.3 3,257
Census Tract 121.04 4,072 5.5 747
Census Tract 109.02 4,069 0.7 5,485
Census Tract 115.16 4,064 1.0 4,039
Census Tract 119.06 3,992 1.2 3,214
Census Tract 114.04 3,967 0.9 4,447
Census Tract 103.15 3,957 2.8 1,391
Census Tract 49 3,941 1.1 3,603
Census Tract 117.06 3,930 1.7 2,314
Census Tract 111.18 3,893 1.0 3,887
Census Tract 105 3,893 1.2 3,264
Census Tract 103.20 3,855 0.8 4,832
Census Tract 108 3,847 1.0 3,752
Census Tract 46 3,840 0.6 6,061
Census Tract 126.06 3,818 1.0 3,990
Census Tract 121.03 3,815 2.8 1,362
Census Tract 88 3,809 0.8 4,514
Census Tract 101.03 3,797 1.0 3,990
Census Tract 39 3,786 0.7 5,636
Census Tract 76.02 3,739 0.5 7,860
Census Tract 120.03 3,726 18.2 204
Census Tract 111.16 3,724 8.2 454
Census Tract 115.14 3,720 1.2 3,212
Census Tract 123.01 3,716 0.7 5,148
Census Tract 90.01 3,700 0.5 7,284
Census Tract 107.07 3,688 1.0 3,800

Showing the 100 most populous of 216 — 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.

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