Ranking of Kentucky Counties By Population in 2018

Updated on June 18, 2025.

Based on the US Census Vintage data estimates, in 2018, the Population for Kentucky was 4.46M. Among all Kentucky counties, Jefferson County had the highest population (768.71K), followed by Fayette County (322.60K), and Kenton County (166.50K).

The chart below shows the top 10 counties, and the table below shows the ranking of all Kentucky counties.

You can see similar ranking information for related topics, and for other states. You can also see the ranking of all counties in the United States.

See this for other years:
Ranking of Kentucky Counties By Population in 2018
Jefferson
Fayette
Kenton
Boone
Warren
Hardin
Daviess
Campbell
Madison
Bullitt
Ranking of Kentucky Counties By Population in 2018
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Rank County Population
1 Jefferson County 768706
2 Fayette County 322597
3 Kenton County 166501
4 Boone County 131971
5 Warren County 130926
6 Hardin County 110435
7 Daviess County 100885
8 Campbell County 93990
9 Madison County 92172
10 Bullitt County 81040
11 Christian County 71036
12 Oldham County 66632
13 McCracken County 65391
14 Pulaski County 64735
15 Laurel County 60652
16 Pike County 58567
17 Scott County 55983
18 Jessamine County 53777
19 Franklin County 50807
20 Shelby County 48073
21 Boyd County 47406
22 Nelson County 45781
23 Henderson County 45566
24 Hopkins County 44978
25 Barren County 44071
26 Calloway County 38982
27 Graves County 37260
28 Clark County 36209
29 Whitley County 36196
30 Floyd County 35861
31 Greenup County 35371
32 Knox County 31326
33 Marshall County 31247
34 Muhlenberg County 30841
35 Boyle County 30109
36 Meade County 28648
37 Montgomery County 28179
38 Carter County 27042
39 Logan County 27003
40 Bell County 26534
41 Woodford County 26487
42 Harlan County 26338
43 Grayson County 26265
44 Perry County 26246
45 Taylor County 25483
46 Grant County 25114
47 Lincoln County 24614
48 Rowan County 24488
49 Ohio County 24125
50 Anderson County 22615
51 Johnson County 22432
52 Letcher County 21847
53 Mercer County 21674
54 Allen County 21104
55 Wayne County 20401
56 Breckinridge County 20286
57 Clay County 20116
58 Bourbon County 20102
59 Marion County 19314
60 Adair County 19201
61 Spencer County 18959
62 Hart County 18868
63 Harrison County 18730
64 Simpson County 18386
65 Russell County 17799
66 Garrard County 17528
67 McCreary County 17327
68 Mason County 17105
69 Rockcastle County 16830
70 Henry County 16049
71 Casey County 15950
72 Lawrence County 15589
73 Knott County 15090
74 Trigg County 14666
75 Pendleton County 14572
76 Union County 14519
77 Fleming County 14490
78 Larue County 14300
79 Estill County 14164
80 Jackson County 13415
81 Morgan County 13363
82 Lewis County 13269
83 Webster County 13047
84 Breathitt County 12762
85 Butler County 12731
86 Caldwell County 12684
87 Bath County 12444
88 Powell County 12356
89 Todd County 12339
90 Magoffin County 12331
91 Edmonson County 12247
92 Washington County 12011
93 Martin County 11349
94 Green County 11007
95 Owen County 10867
96 Monroe County 10746
97 Carroll County 10711
98 Clinton County 10142
99 Leslie County 10135
100 Metcalfe County 10074
101 McLean County 9237
102 Livingston County 9222
103 Crittenden County 8900
104 Hancock County 8751
105 Gallatin County 8739
106 Trimble County 8500
107 Bracken County 8273
108 Lyon County 8198
109 Ballard County 7940
110 Elliott County 7469
111 Wolfe County 7215
112 Nicholas County 7198
113 Lee County 7038
114 Cumberland County 6704
115 Menifee County 6415
116 Fulton County 6049
117 Carlisle County 4711
118 Owsley County 4454
119 Hickman County 4424
120 Robertson County 2147