Ranking of Missouri Counties By Percentage of Population with Irish Ancestry in 2021

Updated on April 16, 2025.

Based on the US Census ACS-5Yrs estimates, in 2021, there were 750.02K people in Missouri with Irish ancestry (12.21% of Missouri population). Among all Missouri counties, Ripley County had the highest percentage of its population with Irish ancestry (17.31%), followed by DeKalb County (17.05%), and Hickory County (16.74%).

The chart and table below shows the top 10 counties with high percentage of its population having Irish ancestry.

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

Data Source: US Census Bureau.
Ranking of Missouri Counties By Percentage of Population with Irish Ancestry in 2021
Ripley County
DeKalb County
Hickory County
St. Charles County
New Madrid County
Reynolds County
Washington County
Jefferson County
Carter County
Franklin County
Ranking of Missouri Counties By Percentage of Population with Irish Ancestry in 2021
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Rank County Percentage of Pop. (%)
1 Ripley County 17.31
2 DeKalb County 17.05
3 Hickory County 16.74
4 St. Charles County 16.30
5 New Madrid County 16.24
6 Reynolds County 16.10
7 Washington County 15.70
8 Jefferson County 15.51
9 Carter County 15.10
10 Franklin County 15.01
11 Crawford County 14.77
12 Laclede County 14.60
13 Atchison County 14.35
14 Gasconade County 14.13
15 Oregon County 14.04
16 Christian County 14.00
17 Bates County 13.94
18 Platte County 13.93
19 Worth County 13.92
20 Cass County 13.86
21 Butler County 13.83
22 Ray County 13.76
23 Maries County 13.71
24 Polk County 13.70
25 Clinton County 13.69
26 Johnson County 13.64
27 Stoddard County 13.51
28 Clay County 13.38
29 Clark County 13.37
29 Vernon County 13.37
30 Henry County 13.32
30 Lawrence County 13.32
31 Lincoln County 13.19
31 Randolph County 13.19
32 Dunklin County 13.14
33 Montgomery County 13.12
34 Monroe County 13.06
35 Stone County 13.00
36 Miller County 12.97
37 Wright County 12.78
38 Warren County 12.77
39 St. Louis County 12.71
40 St. Francois County 12.70
41 Ralls County 12.69
42 Buchanan County 12.63
43 Iron County 12.62
44 Taney County 12.53
45 Webster County 12.46
46 Shannon County 12.23
47 Boone County 12.16
48 Cedar County 12.14
49 Benton County 11.92
50 Jasper County 11.85
51 Ozark County 11.75
52 Andrew County 11.70
52 Newton County 11.70
53 Douglas County 11.64
54 Callaway County 11.60
54 Holt County 11.60
55 Camden County 11.58
56 Moniteau County 11.30
57 Wayne County 11.22
58 Dent County 11.21
59 Nodaway County 11.16
60 Marion County 11.15
61 Barton County 11.14
62 Adair County 11.05
63 Macon County 10.96
64 Gentry County 10.91
65 Jackson County 10.88
66 Phelps County 10.81
67 Harrison County 10.57
68 Pike County 10.36
69 Ste. Genevieve County 10.32
70 Dade County 10.27
71 Greene County 10.25
72 Pemiscot County 10.24
73 Pettis County 10.21
74 Pulaski County 10.14
74 Saline County 10.14
75 Daviess County 9.92
76 Madison County 9.84
77 St. Louis city 9.74
78 Howell County 9.69
79 Carroll County 9.65
80 Mercer County 9.58
81 Perry County 9.52
82 Audrain County 9.40
83 Lafayette County 9.31
84 Texas County 9.29
85 Cooper County 9.16
86 Scott County 9.15
87 Cole County 9.14
88 St. Clair County 8.85
89 Grundy County 8.80
90 Lewis County 8.73
91 Howard County 8.72
92 Barry County 8.71
93 Morgan County 8.63
94 Linn County 8.55
95 Cape Girardeau County 8.53
95 Livingston County 8.53
96 Dallas County 8.46
97 Bollinger County 8.38
98 Caldwell County 8.19
99 Mississippi County 8.08
100 Shelby County 7.57
101 Putnam County 7.47
102 Osage County 7.44
103 Schuyler County 6.94
104 McDonald County 6.41
105 Sullivan County 6.07
106 Chariton County 5.91
107 Scotland County 4.98
108 Knox County 4.15