Akashic
1876–2024
Communities / ancestry

The most Irish-ancestry places in America

Counties and cities ranked by Irish ancestry — with how each one voted in 2024 and how it has shifted since 2020. Of the top 100 counties by irish, 56 voted Republican and 44 Democratic in 2024 (median R+3.5); as a group they shifted −3.9 points toward Republicans from 2020 to 2024.

Counties ≥ 5,000 population, ranked by Irish. “2024” is the two-party presidential margin; “Since ’20” is the 2020→2024 shift in points (positive = toward Democrats). Sources: U.S. Census ACS 2024 5-year · 2020 U.S. Religion Census (ASARB) · MIT Election Lab.
#PlaceIrish2024Since ’20
1Plymouth County, MA27.6%D D+8.8−8.4
2Cape May County, NJ27.1%R R+19.2−3.2
3Barnstable County, MA25.2%D D+20.6−3.6
4Silver Bow County, MT24.8%D D+7.0−7.2
5Rockingham County, NH24.7%R R+2.4−4.5
6Gloucester County, NJ24.5%R R+2.8−4.8
7Norfolk County, MA24.0%D D+28.5−7.5
8Rensselaer County, NY23.7%D D+1.4−4.3
9Washington County, RI23.6%D D+15.0−4.4
10Newport County, RI23.5%D D+25.5−4.3
11Belknap County, NH22.7%R R+13.0−2.6
12Saratoga County, NY22.6%D D+1.8−3.6
13Delaware County, PA22.2%D D+23.7−3.1
14Bucks County, PA22.0%R R+0.1−4.5
15Lackawanna County, PA21.9%D D+2.8−5.6
16Cayuga County, NY21.8%R R+13.0−4.1
17Strafford County, NH21.6%D D+12.0−3.2
18Palo Alto County, IA21.3%R R+44.9−7.6
19Sussex County, NJ21.2%R R+24.9−5.2
20Monroe County, IA21.1%R R+50.6−4.1
21Warren County, NY21.1%R R+4.2−4.0
22Chester County, PA20.8%D D+14.5−2.7
23Kent County, RI20.6%D D+1.9−5.8
24Carroll County, NH20.5%R R+1.7−3.2
25Stone County, AR20.4%R R+61.7−3.8
26Merrimack County, NH20.2%D D+5.2−4.6
27Hamilton County, NY20.2%R R+29.4+0.8
28Hillsborough County, NH19.9%D D+2.9−4.8
29Deer Lodge County, MT19.8%D D+1.0−6.7
30Washington County, NY19.8%R R+21.1−5.6
31Pike County, PA19.8%R R+24.0−5.0
32Hunterdon County, NJ19.7%R R+6.7−2.2
33Greene County, NY19.5%R R+16.9−1.2
34Susquehanna County, PA19.5%R R+44.7−3.5
35Lower Connecticut River Valley Planning Region, CT19.4%D D+12.8−3.5
36Dubuque County, IA19.4%R R+8.6−5.7
37Cumberland County, ME19.2%D D+35.3−0.0
38Dukes County, MA19.2%D D+52.4−4.2
39Nantucket County, MA19.2%D D+36.7−8.6
40Monmouth County, NJ19.2%R R+11.4−8.6
41Butler County, PA19.1%R R+32.2+0.3
42Berkshire County, MA19.0%D D+39.7−7.1
43Jefferson County, MT19.0%R R+36.5−3.2
44Essex County, NY19.0%D D+0.5−4.5
45York County, ME18.9%D D+10.5−2.0
46Albany County, NY18.9%D D+25.6−5.9
47Herkimer County, NY18.9%R R+36.4−5.9
48Montgomery County, PA18.9%D D+22.8−3.5
49Jo Daviess County, IL18.8%R R+16.8−0.4
50Northwest Hills Planning Region, CT18.7%R R+5.4−3.2
51Essex County, MA18.7%D D+20.2−8.6
52Wayne County, PA18.6%R R+37.1−3.5
53Bennington County, VT18.6%D D+22.4−5.0
54Windham County, VT18.6%D D+42.3−5.0
55Park County, MT18.5%R R+7.7−1.3
56Gilchrist County, FL18.4%R R+68.0−4.1
57Middlesex County, MA18.3%D D+39.2−5.7
58Bristol County, RI18.3%D D+26.4−2.9
59Chittenden County, VT18.3%D D+53.1−1.4
60Marion County, AR18.2%R R+60.2−3.6
61Madison County, MT18.1%R R+45.3−5.5
62Delaware County, NY18.1%R R+19.7−1.2
63Oswego County, NY18.1%R R+24.1−3.9
64Hampshire County, MA17.9%D D+41.7−4.8
65Genesee County, NY17.9%R R+33.9−2.2
66Ontario County, NY17.9%R R+1.2−1.1
67Lawrence County, PA17.8%R R+33.8−4.2
68Rutland County, VT17.8%D D+5.2−5.2
69Clear Creek County, CO17.7%D D+16.6+3.6
70Onondaga County, NY17.7%D D+17.2−2.8
71Ulster County, NY17.7%D D+18.5−2.4
72Mariposa County, CA17.6%R R+21.1−3.0
73Carroll County, MD17.6%R R+24.7−1.1
74Burlington County, NJ17.6%D D+16.6−3.1
75Putnam County, NY17.6%R R+13.6−5.8
76Beaver County, PA17.5%R R+20.7−3.0
77Dutchess County, NY17.4%D D+5.4−4.3
78Tioga County, NY17.4%R R+22.8−2.2
79Washington County, VT17.4%D D+43.0−3.1
80Lake County, OH17.3%R R+14.3−0.7
81Doddridge County, WV17.3%R R+73.3−2.9
82Calaveras County, CA17.2%R R+28.1−4.4
83Saline County, IL17.2%R R+49.0−1.1
84Ocean County, NJ17.2%R R+36.0−7.1
85Broome County, NY17.2%D D+0.4−3.0
86Schoharie County, NY17.2%R R+30.4−1.3
87Harrison County, WV17.2%R R+40.9−3.3
88Valley County, ID17.1%R R+18.6−4.8
89Kent County, MD17.1%R R+2.8−4.0
90Worcester County, MA17.1%D D+10.0−7.8
91Box Butte County, NE17.1%R R+56.4+0.4
92Grafton County, NH17.1%D D+19.8−4.7
93Livingston County, NY17.1%R R+21.4−3.2
94Rappahannock County, VA17.1%R R+17.8−3.4
95Marion County, WV17.1%R R+31.2−2.6
96Franklin County, FL17.0%R R+43.8−6.5
97Newton County, IN17.0%R R+57.0−4.9
98Blair County, PA17.0%R R+43.5+0.1
99Hancock County, ME16.9%D D+11.8−0.5
100Franklin County, MA16.9%D D+37.6−6.2
Incorporated places ≥ 5,000 population. City presidential results are precinct-derived for 2008–2024, so the “Since ’20” shift uses the same modern series.
#PlaceIrish2024Since ’20
1Abington, MA27.6%D D+0.8−9.3
2Bridgewater Town, MA27.6%R R+0.3−8.0
3Brockton, MA27.6%D D+42.6−11.1
4Hingham, MA27.6%D D+33.6−4.3
5Hull, MA27.6%D D+23.8−5.5
6Kingston, MA27.6%D D+1.6−10.7
7Marshfield, MA27.6%D D+7.5−5.2
8Middleborough Center, MA27.6%R R+7.8−10.1
9North Scituate, MA27.6%D D+26.6−5.6
10Plymouth, MA27.6%D D+16.3−9.5
11Scituate, MA27.6%D D+23.3−3.7
12The Pinehills, MA27.6%D D+27.8+2.0
13Cape May Court House, NJ27.1%R R+14.4+1.3
14Ocean, NJ27.1%R R+14.0−3.3
15Villas, NJ27.1%R R+20.2−1.3
16Wildwood, NJ27.1%R R+18.9−10.9
17Barnstable Town, MA25.2%D D+11.8−5.9
18East Falmouth, MA25.2%D D+18.3−3.4
19East Harwich, MA25.2%D D+22.4−3.1
20South Yarmouth, MA25.2%D D+13.2−7.2
21West Yarmouth, MA25.2%D D+12.8−5.0
22Yarmouth Port, MA25.2%D D+20.9−1.3
23Butte-Silver Bow (balance), MT24.8%D D+7.0−7.1
24Derry, NH24.7%R R+11.9−5.1
25Exeter, NH24.7%D D+33.0−1.0
26Hampton, NH24.7%D D+6.6−1.5
27Londonderry, NH24.7%R R+4.8−3.8
28Newmarket, NH24.7%D D+31.5−2.3
29Portsmouth, NH24.7%D D+41.7−4.7
30Beckett, NJ24.5%D D+8.6−1.8
31Clayton, NJ24.5%D D+7.5−4.2
32Glassboro, NJ24.5%D D+15.7−5.9
33Paulsboro, NJ24.5%D D+28.5−5.9
34Pitman, NJ24.5%D D+6.7−1.4
35Williamstown, NJ24.5%R R+3.1−3.6
36Woodbury, NJ24.5%D D+34.7−1.8
37Bellingham, MA24.0%D D+2.8−6.8
38Braintree Town, MA24.0%D D+6.5−11.3
39Brookline, MA24.0%D D+70.7−5.6
40Dedham, MA24.0%D D+29.2−8.5
41Foxborough, MA24.0%D D+11.8−9.8
42Franklin Town, MA24.0%D D+18.4−6.8
43Holbrook, MA24.0%D D+12.6−8.8
44Medfield, MA24.0%D D+33.6−6.6
45Milton, MA24.0%D D+42.3−5.4
46Needham, MA24.0%D D+52.5−4.6
47Norwood, MA24.0%D D+20.9−10.0
48Quincy, MA24.0%D D+24.5−10.7
49Randolph Town, MA24.0%D D+50.4−7.7
50Sharon, MA24.0%D D+44.9−8.7

Rankings suppress places below 5,000 population, where small-sample ACS shares get noisy. Demographic shares are American Community Survey 5-year estimates (ancestry table B04006, language C16001) and the 2020 U.S. Religion Census; every figure traces to a named federal or academic source. The vote columns are presidential — a place can be demographically homogeneous and politically split, which is exactly what these tables are built to show.