Kentucky Population By County in 2021

Updated on June 16, 2025.

Based on the US Census Vintage data estimates, in 2021, the population of Kentucky was 4,507,583. Among all Kentucky counties, Jefferson had the highest population (777,624), followed by Fayette (320,431), and Kenton (169,641).

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.

Related Topics: Kentucky Census Vintage Data Topic List.

Data Source: US Census Bureau (Vintage).

See this for other years:

Kentucky Population By County in 2021

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County	Population	% of State Population
Adair	18928	0.42
Allen	20833	0.46
Anderson	24093	0.53
Ballard	7689	0.17
Barren	44588	0.99
Bath	12797	0.28
Bell	23788	0.53
Boone	137707	3.06
Bourbon	20220	0.45
Boyd	47754	1.06
Boyle	30600	0.68
Bracken	8445	0.19
Breathitt	13558	0.30
Breckinridge	20679	0.46
Bullitt	83068	1.84
Butler	12297	0.27
Caldwell	12682	0.28
Calloway	37904	0.84
Campbell	92824	2.06
Carlisle	4761	0.11
Carroll	10899	0.24
Carter	26438	0.59
Casey	15922	0.35
Christian	73144	1.62
Clark	36892	0.82
Clay	20162	0.45
Clinton	9281	0.21
Crittenden	8944	0.20
Cumberland	5902	0.13
Daviess	103087	2.29
Edmonson	12228	0.27
Elliott	7364	0.16
Estill	14083	0.31
Fayette	320431	7.11
Fleming	15262	0.34
Floyd	35298	0.78
Franklin	51721	1.15
Fulton	6486	0.14
Gallatin	8756	0.19
Garrard	17368	0.39
Grant	25293	0.56
Graves	36665	0.81
Grayson	26582	0.59
Green	11328	0.25
Greenup	35660	0.79
Hancock	9076	0.20
Hardin	111870	2.48
Harlan	26139	0.58
Harrison	18961	0.42
Hart	19476	0.43
Henderson	44409	0.99
Henry	15707	0.35
Hickman	4427	0.10
Hopkins	45149	1.00
Jackson	12975	0.29
Jefferson	777624	17.25
Jessamine	53583	1.19
Johnson	22550	0.50
Kenton	169641	3.76
Knott	14040	0.31
Knox	30028	0.67
Larue	15035	0.33
Laurel	62582	1.39
Lawrence	16273	0.36
Lee	7457	0.17
Leslie	10284	0.23
Letcher	21229	0.47
Lewis	12982	0.29
Lincoln	24232	0.54
Livingston	8981	0.20
Logan	27807	0.62
Lyon	8434	0.19
McCracken	67554	1.50
McCreary	16800	0.37
McLean	9121	0.20
Madison	93453	2.07
Magoffin	11490	0.26
Marion	19728	0.44
Marshall	31810	0.71
Martin	11165	0.25
Mason	16952	0.38
Meade	30125	0.67
Menifee	6175	0.14
Mercer	22859	0.51
Metcalfe	10387	0.23
Monroe	11263	0.25
Montgomery	28218	0.63
Morgan	13691	0.30
Muhlenberg	30334	0.67
Nelson	47135	1.05
Nicholas	7733	0.17
Ohio	23729	0.53
Oldham	68251	1.51
Owen	11301	0.25
Owsley	3971	0.09
Pendleton	14632	0.33
Perry	27929	0.62
Pike	57434	1.27
Powell	13095	0.29
Pulaski	65538	1.45
Robertson	2259	0.05
Rockcastle	16141	0.36
Rowan	24565	0.55
Russell	18166	0.40
Scott	58431	1.30
Shelby	48600	1.08
Simpson	19734	0.44
Spencer	19879	0.44
Taylor	26179	0.58
Todd	12296	0.27
Trigg	14225	0.32
Trimble	8553	0.19
Union	13251	0.29
Warren	137191	3.04
Washington	12076	0.27
Wayne	19543	0.43
Webster	12858	0.28
Whitley	36805	0.82
Wolfe	6507	0.14
Woodford	27089	0.60