Kentucky Population By County in 2020

Updated on August 1, 2024.

Based on the US Census Vintage data estimates, in 2020, the population of Kentucky was 4,508,155. Among all Kentucky counties, Jefferson had the highest population (782,845), followed by Fayette (322,627), and Kenton (169,271). Robertson was the least populated county (2,184).

Hover over or click on the counties in the map below to see the populations. The data can also be found in a table below. You can use the table to sort, filter, and explore the data further.

You can see similar information for other states and by state for the United States.

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Kentucky Population By County in 2020
Kentucky Population By County in 2020
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County Population % of State Population
Adair 18883 0.42
Allen 20574 0.46
Anderson 23883 0.53
Ballard 7713 0.17
Barren 44505 0.99
Bath 12716 0.28
Bell 23984 0.53
Boone 136468 3.03
Bourbon 20286 0.45
Boyd 48206 1.07
Boyle 30753 0.68
Bracken 8400 0.19
Breathitt 13693 0.30
Breckinridge 20447 0.45
Bullitt 82366 1.83
Butler 12316 0.27
Caldwell 12635 0.28
Calloway 37596 0.83
Campbell 93127 2.07
Carlisle 4807 0.11
Carroll 10825 0.24
Carter 26609 0.59
Casey 15918 0.35
Christian 72762 1.61
Clark 37035 0.82
Clay 20312 0.45
Clinton 9232 0.21
Crittenden 9003 0.20
Cumberland 5856 0.13
Daviess 103405 2.29
Edmonson 12152 0.27
Elliott 7334 0.16
Estill 14161 0.31
Fayette 322627 7.16
Fleming 15101 0.34
Floyd 35798 0.79
Franklin 51594 1.14
Fulton 6511 0.14
Gallatin 8673 0.19
Garrard 16963 0.38
Grant 25015 0.56
Graves 36528 0.81
Grayson 26460 0.59
Green 11132 0.25
Greenup 35877 0.80
Hancock 9101 0.20
Hardin 110829 2.46
Harlan 26754 0.59
Harrison 18719 0.42
Hart 19290 0.43
Henderson 44678 0.99
Henry 15698 0.35
Hickman 4529 0.10
Hopkins 45369 1.01
Jackson 12963 0.29
Jefferson 782845 17.36
Jessamine 53024 1.18
Johnson 22648 0.50
Kenton 169271 3.76
Knott 14158 0.31
Knox 30185 0.67
Larue 14873 0.33
Laurel 62727 1.39
Lawrence 16303 0.36
Lee 7368 0.16
Leslie 10468 0.23
Letcher 21465 0.48
Lewis 13087 0.29
Lincoln 24255 0.54
Livingston 8871 0.20
Logan 27513 0.61
Lyon 8679 0.19
McCracken 67917 1.51
McCreary 16840 0.37
McLean 9136 0.20
Madison 92993 2.06
Magoffin 11603 0.26
Marion 19592 0.44
Marshall 31691 0.70
Martin 11253 0.25
Mason 17133 0.38
Meade 30026 0.67
Menifee 6146 0.14
Mercer 22655 0.50
Metcalfe 10288 0.23
Monroe 11319 0.25
Montgomery 28112 0.62
Morgan 13735 0.31
Muhlenberg 30894 0.69
Nelson 46779 1.04
Nicholas 7541 0.17
Ohio 23747 0.53
Oldham 67693 1.50
Owen 11301 0.25
Owsley 4032 0.09
Pendleton 14648 0.33
Perry 28367 0.63
Pike 58441 1.30
Powell 13093 0.29
Pulaski 65116 1.44
Robertson 2184 0.05
Rockcastle 16059 0.36
Rowan 24722 0.55
Russell 18002 0.40
Scott 57531 1.28
Shelby 48244 1.07
Simpson 19633 0.44
Spencer 19511 0.43
Taylor 26000 0.58
Todd 12288 0.27
Trigg 14078 0.31
Trimble 8460 0.19
Union 13652 0.30
Warren 135028 3.00
Washington 12043 0.27
Wayne 19539 0.43
Webster 13018 0.29
Whitley 36698 0.81
Wolfe 6559 0.14
Woodford 26904 0.60