Ranking of Kentucky Counties By Population with Irish Ancestry in 2021

Updated on April 16, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, there were 501.58K people in Kentucky with Irish ancestry. Among all Kentucky counties, Jefferson County had the highest population with Irish ancestry (95.04K), followed by Fayette County (35.34K), and Kenton County (29.64K).

The chart and table below shows the top 10 counties with high number of people with Irish ancestry.

You can see similar information for other states and for other ancestry groups in Kentucky.

Data Source: US Census Bureau.
Ranking of Kentucky Counties By Population with Irish Ancestry in 2021
Jefferson County
Fayette County
Kenton County
Boone County
Campbell County
Warren County
Hardin County
Bullitt County
Daviess County
Madison County
Ranking of Kentucky Counties By Population with Irish Ancestry in 2021
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Rank County Population
1 Jefferson County 95038
2 Fayette County 35337
3 Kenton County 29641
4 Boone County 20734
5 Campbell County 14772
6 Warren County 13215
7 Hardin County 12164
8 Bullitt County 12070
9 Daviess County 11280
10 Madison County 9373
11 Oldham County 9204
12 Pulaski County 7549
13 Franklin County 7133
14 Scott County 6701
15 Jessamine County 6342
16 Shelby County 6223
17 Laurel County 5925
18 Pike County 5755
19 McCracken County 5675
20 Nelson County 5337
21 Boyd County 5166
22 Meade County 4738
23 Clark County 4380
24 Henderson County 4287
25 Christian County 4252
26 Hopkins County 3973
27 Marshall County 3962
28 Whitley County 3841
29 Breckinridge County 3565
30 Boyle County 3527
31 Grant County 3315
32 Woodford County 3259
33 Calloway County 3243
34 Greenup County 3224
35 Floyd County 2975
36 Anderson County 2970
37 Graves County 2960
38 Rowan County 2957
39 Perry County 2863
40 Barren County 2843
41 Johnson County 2795
42 Taylor County 2613
43 Grayson County 2479
43 Harlan County 2479
44 Logan County 2476
45 Knox County 2453
46 Letcher County 2409
47 Muhlenberg County 2368
48 Montgomery County 2314
49 Ohio County 2230
50 Bourbon County 2194
51 Henry County 2124
52 Bell County 2111
53 Marion County 2096
54 Fleming County 2008
55 Mason County 2006
56 Lincoln County 2004
57 Allen County 1989
58 Carter County 1934
59 Simpson County 1929
60 Wayne County 1913
61 Mercer County 1899
62 Harrison County 1877
63 Larue County 1705
64 Spencer County 1686
65 Knott County 1656
66 Bath County 1642
67 Hart County 1519
68 Owen County 1506
69 Trigg County 1496
70 Martin County 1494
71 Powell County 1475
72 Pendleton County 1469
73 Adair County 1466
74 Russell County 1465
75 Washington County 1441
76 Crittenden County 1423
77 Casey County 1362
78 Estill County 1296
79 Lewis County 1286
80 Lawrence County 1264
81 Rockcastle County 1259
82 Garrard County 1258
83 Hancock County 1253
84 Butler County 1252
85 Leslie County 1240
86 McCreary County 1236
87 Morgan County 1221
88 Union County 1212
89 Magoffin County 1159
90 Webster County 1132
91 Carroll County 1124
92 Ballard County 1050
93 Gallatin County 1027
94 Trimble County 1019
95 Caldwell County 1013
96 Bracken County 993
97 Elliott County 944
98 Lyon County 907
99 Clay County 883
100 Metcalfe County 829
101 Nicholas County 750
102 Lee County 746
103 Edmonson County 717
104 Green County 702
105 Monroe County 700
106 Todd County 679
107 Breathitt County 673
108 McLean County 654
109 Clinton County 622
110 Jackson County 599
111 Fulton County 584
112 Wolfe County 525
113 Menifee County 490
114 Hickman County 488
115 Livingston County 472
116 Cumberland County 457
117 Carlisle County 317
118 Robertson County 147
119 Owsley County 128