Kentucky Citizen Population By County in 2018 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2018, the citizen population for Kentucky was 4,337,525 and represented 97.69% of the total Kentucky population.

Among all Kentucky counties, Jefferson had the highest citizen population (735.48K), followed by Fayette (296.83K), and Kenton (161.74K).

In terms of percentages, Caldwell had the highest percentage of its population being citizens (100.00%), followed by Jackson (100.00%), and Livingston (100.00%).

The chart and table below shows the citizen population of each county and the percentage of each county's population that were citizens.

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

You may also be interested in:
Kentucky Citizen Voting-age Population By County in 2018

Data Source: US Census - ACS 5-Year (CVAP).

See this for other years:

Kentucky Citizen Population By County in 2018

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County	Citizen Population	% of County Population
Jefferson	735480	95.87
Fayette	296830	93.13
Kenton	161735	98.21
Boone	124910	96.76
Warren	118505	93.74
Hardin	106375	98.41
Daviess	97925	97.99
Campbell	91180	98.82
Madison	88065	98.18
Bullitt	79260	99.74
Christian	71210	98.54
McCracken	64795	99.25
Oldham	64485	98.64
Pulaski	63240	98.59
Pike	60265	99.64
Laurel	60145	99.94
Scott	52135	97.42
Jessamine	50835	96.98
Franklin	49135	97.69
Boyd	47825	99.45
Henderson	45810	99.30
Hopkins	45415	99.45
Nelson	45130	99.43
Shelby	44505	95.13
Barren	43090	98.65
Calloway	37395	96.44
Floyd	36890	99.91
Graves	36470	97.79
Whitley	35810	99.22
Greenup	35670	99.73
Clark	35370	98.61
Knox	31235	99.27
Marshall	31020	99.54
Muhlenberg	30785	99.05
Boyle	29445	98.43
Meade	28130	99.31
Montgomery	27580	99.35
Carter	27215	99.73
Bell	27120	99.74
Harlan	27065	99.74
Logan	26720	99.52
Perry	26555	98.66
Grayson	26025	99.41
Taylor	25145	98.61
Woodford	25035	95.94
Grant	24875	99.84
Lincoln	24300	99.35
Rowan	24130	98.49
Ohio	23955	99.52
Johnson	22695	99.34
Letcher	22620	99.76
Anderson	21975	98.92
Mercer	21055	97.86
Allen	20680	99.45
Clay	20525	99.54
Wayne	20400	98.98
Breckinridge	20010	99.65
Bourbon	19360	96.10
Adair	19030	98.91
Marion	19015	98.88
Harrison	18530	99.25
Hart	18530	99.49
Spencer	18145	99.45
Simpson	17825	98.67
McCreary	17490	99.18
Russell	17425	98.11
Garrard	17180	99.13
Mason	16900	98.51
Rockcastle	16820	99.97
Henry	15680	99.15
Casey	15640	99.02
Lawrence	15635	99.05
Knott	15455	99.61
Union	14665	99.09
Pendleton	14470	99.66
Fleming	14450	99.79
Estill	14305	99.93
Trigg	14305	99.72
Larue	13915	98.30
Lewis	13455	99.74
Jackson	13375	100.00
Morgan	13120	98.76
Breathitt	13105	99.92
Webster	12820	97.45
Caldwell	12725	100.00
Magoffin	12645	99.84
Butler	12555	98.51
Powell	12260	99.51
Bath	12170	99.19
Todd	12120	98.14
Edmonson	12080	99.67
Martin	11910	99.92
Washington	11745	97.71
Green	10950	99.32
Owen	10735	99.95
Carroll	10500	98.04
Leslie	10465	99.95
Monroe	10440	98.17
Clinton	10140	99.31
Metcalfe	9955	99.50
McLean	9280	99.46
Livingston	9265	100.00
Crittenden	9060	99.73
Hancock	8675	99.48
Trimble	8540	98.90
Gallatin	8485	97.47
Bracken	8210	98.86
Ballard	8055	99.57
Lyon	8020	97.98
Elliott	7510	99.93
Wolfe	7220	99.93
Nicholas	7060	99.44
Lee	6700	99.26
Cumberland	6685	99.55
Menifee	6395	99.84
Fulton	6160	99.20
Carlisle	4835	99.90
Hickman	4555	99.67
Owsley	4465	100.00
Robertson	2145	100.00