AkashicThe most Irish-ancestry places in America
Of the 100 counties most defined by irish, 56 voted Republican and 44 Democratic in 2024 — a median of R+3.5, and as a group they shifted −3.9 points toward Republicans from 2020 to 2024.
Does irish move the vote?
Every U.S. county, plotted by how much of the community lives there against its 2024 presidential margin — the demographic dial on one axis, the political one on the other.
Across every county, irish barely moves the vote either way — little relationship (r = −0.02).
| Irish range | Counties | Median margin |
|---|---|---|
| 2.6% – 3.6% | 120 | D+1.4 |
| 3.6% – 4.6% | 97 | R+16.3 |
| 4.6% – 5.5% | 151 | R+32.7 |
| 5.5% – 6.5% | 176 | R+35.1 |
| 6.5% – 7.5% | 197 | R+44.3 |
| 7.5% – 8.5% | 218 | R+40.7 |
| 8.5% – 9.5% | 297 | R+42.4 |
| 9.5% – 10.5% | 341 | R+46.3 |
| 10.5% – 11.4% | 326 | R+45.4 |
| 11.4% – 12.4% | 269 | R+45.1 |
| 12.4% – 13.4% | 203 | R+37.0 |
| 13.4% – 14.4% | 153 | R+39.2 |
| 14.4% – 15.4% | 86 | R+28.6 |
| 15.4% – 16.3% | 61 | R+21.9 |
| 16.3% – 17.3% | 50 | R+26.9 |
| 17.3% – 18.3% | 79 | R+0.1 |
Where irish concentrates
Every county shaded by irish — deep where the community clusters, pale at the other end. Counties below 5,000 population are suppressed.
The leaderboard
Ranked most to least by irish. Filter by region or state, switch the column lens, cap the list, and sort on any figure.
| # | 2008–24 | |||||
|---|---|---|---|---|---|---|
| 1 | Plymouth County, MA | 27.6% | D D+8.8 | −8.4 | 300,129 | |
| 2 | Cape May County, NJ | 27.1% | R R+19.2 | −3.2 | 54,568 | |
| 3 | Barnstable County, MA | 25.2% | D D+20.6 | −3.6 | 148,785 | |
| 4 | Silver Bow County, MT | 24.8% | D D+7.0 | −7.2 | 18,226 | |
| 5 | Rockingham County, NH | 24.7% | R R+2.4 | −4.5 | 202,929 | |
| 6 | Gloucester County, NJ | 24.5% | R R+2.8 | −4.8 | 164,635 | |
| 7 | Norfolk County, MA | 24.0% | D D+28.5 | −7.5 | 386,447 | |
| 8 | Rensselaer County, NY | 23.7% | D D+1.4 | −4.3 | 78,736 | |
| 9 | Washington County, RI | 23.6% | D D+15.0 | −4.4 | 75,556 | |
| 10 | Newport County, RI | 23.5% | D D+25.5 | −4.3 | 44,349 | |
| 11 | Belknap County, NH | 22.7% | R R+13.0 | −2.6 | 40,676 | |
| 12 | Saratoga County, NY | 22.6% | D D+1.8 | −3.6 | 130,812 | |
| 13 | Delaware County, PA | 22.2% | D D+23.7 | −3.1 | 328,172 | |
| 14 | Bucks County, PA | 22.0% | R R+0.1 | −4.5 | 401,028 | |
| 15 | Lackawanna County, PA | 21.9% | D D+2.8 | −5.6 | 116,590 | |
| 16 | Cayuga County, NY | 21.8% | R R+13.0 | −4.1 | 36,343 | |
| 17 | Strafford County, NH | 21.6% | D D+12.0 | −3.2 | 76,690 | |
| 18 | Palo Alto County, IA | 21.3% | R R+44.9 | −7.6 | 4,982 | |
| 19 | Sussex County, NJ | 21.2% | R R+24.9 | −5.2 | 84,629 | |
| 20 | Monroe County, IA | 21.1% | R R+50.6 | −4.1 | 4,158 | |
| 21 | Warren County, NY | 21.1% | R R+4.2 | −4.0 | 35,829 | |
| 22 | Chester County, PA | 20.8% | D D+14.5 | −2.7 | 324,964 | |
| 23 | Kent County, RI | 20.6% | D D+1.9 | −5.8 | 92,648 | |
| 24 | Carroll County, NH | 20.5% | R R+1.7 | −3.2 | 34,658 | |
| 25 | Stone County, AR | 20.4% | R R+61.7 | −3.8 | 6,030 | |
| 26 | Merrimack County, NH | 20.2% | D D+5.2 | −4.6 | 92,979 | |
| 27 | Hamilton County, NY | 20.2% | R R+29.4 | +0.8 | 3,439 | |
| 28 | Hillsborough County, NH | 19.9% | D D+2.9 | −4.8 | 234,443 | |
| 29 | Deer Lodge County, MT | 19.8% | D D+1.0 | −6.7 | 4,870 | |
| 30 | Washington County, NY | 19.8% | R R+21.1 | −5.6 | 28,586 | |
| 31 | Pike County, PA | 19.8% | R R+24.0 | −5.0 | 34,950 | |
| 32 | Hunterdon County, NJ | 19.7% | R R+6.7 | −2.2 | 80,925 | |
| 33 | Greene County, NY | 19.5% | R R+16.9 | −1.2 | 25,310 | |
| 34 | Susquehanna County, PA | 19.5% | R R+44.7 | −3.5 | 22,404 | |
| 35 | Lower Connecticut River Valley Planning Region, CT | 19.4% | D D+12.8 | −3.5 | 102,634 | |
| 36 | Dubuque County, IA | 19.4% | R R+8.6 | −5.7 | 52,770 | |
| 37 | Cumberland County, ME | 19.2% | D D+35.3 | −0.0 | 192,656 | |
| 38 | Dukes County, MA | 19.2% | D D+52.4 | −4.2 | 12,209 | |
| 39 | Nantucket County, MA | 19.2% | D D+36.7 | −8.6 | 7,118 | |
| 40 | Monmouth County, NJ | 19.2% | R R+11.4 | −8.6 | 360,143 | |
| 41 | Butler County, PA | 19.1% | R R+32.2 | +0.3 | 121,440 | |
| 42 | Berkshire County, MA | 19.0% | D D+39.7 | −7.1 | 68,674 | |
| 43 | Jefferson County, MT | 19.0% | R R+36.5 | −3.2 | 8,291 | |
| 44 | Essex County, NY | 19.0% | D D+0.5 | −4.5 | 19,236 | |
| 45 | York County, ME | 18.9% | D D+10.5 | −2.0 | 132,838 | |
| 46 | Albany County, NY | 18.9% | D D+25.6 | −5.9 | 148,577 | |
| 47 | Herkimer County, NY | 18.9% | R R+36.4 | −5.9 | 28,725 | |
| 48 | Montgomery County, PA | 18.9% | D D+22.8 | −3.5 | 520,906 | |
| 49 | Jo Daviess County, IL | 18.8% | R R+16.8 | −0.4 | 12,414 | |
| 50 | Northwest Hills Planning Region, CT | 18.7% | R R+5.4 | −3.2 | 63,238 | |
| 51 | Essex County, MA | 18.7% | D D+20.2 | −8.6 | 401,851 | |
| 52 | Wayne County, PA | 18.6% | R R+37.1 | −3.5 | 29,444 | |
| 53 | Bennington County, VT | 18.6% | D D+22.4 | −5.0 | 20,710 | |
| 54 | Windham County, VT | 18.6% | D D+42.3 | −5.0 | 25,933 | |
| 55 | Park County, MT | 18.5% | R R+7.7 | −1.3 | 11,717 | |
| 56 | Gilchrist County, FL | 18.4% | R R+68.0 | −4.1 | 10,686 | |
| 57 | Middlesex County, MA | 18.3% | D D+39.2 | −5.7 | 814,832 | |
| 58 | Bristol County, RI | 18.3% | D D+26.4 | −2.9 | 28,117 | |
| 59 | Chittenden County, VT | 18.3% | D D+53.1 | −1.4 | 97,329 | |
| 60 | Marion County, AR | 18.2% | R R+60.2 | −3.6 | 7,851 | |
| 61 | Madison County, MT | 18.1% | R R+45.3 | −5.5 | 6,461 | |
| 62 | Delaware County, NY | 18.1% | R R+19.7 | −1.2 | 23,156 | |
| 63 | Oswego County, NY | 18.1% | R R+24.1 | −3.9 | 54,163 | |
| 64 | Hampshire County, MA | 17.9% | D D+41.7 | −4.8 | 84,720 | |
| 65 | Genesee County, NY | 17.9% | R R+33.9 | −2.2 | 28,444 | |
| 66 | Ontario County, NY | 17.9% | R R+1.2 | −1.1 | 59,987 | |
| 67 | Lawrence County, PA | 17.8% | R R+33.8 | −4.2 | 47,110 | |
| 68 | Rutland County, VT | 17.8% | D D+5.2 | −5.2 | 34,102 | |
| 69 | Clear Creek County, CO | 17.7% | D D+16.6 | +3.6 | 6,102 | |
| 70 | Onondaga County, NY | 17.7% | D D+17.2 | −2.8 | 228,381 | |
| 71 | Ulster County, NY | 17.7% | D D+18.5 | −2.4 | 98,534 | |
| 72 | Mariposa County, CA | 17.6% | R R+21.1 | −3.0 | 9,509 | |
| 73 | Carroll County, MD | 17.6% | R R+24.7 | −1.1 | 102,651 | |
| 74 | Burlington County, NJ | 17.6% | D D+16.6 | −3.1 | 229,466 | |
| 75 | Putnam County, NY | 17.6% | R R+13.6 | −5.8 | 55,765 | |
| 76 | Beaver County, PA | 17.5% | R R+20.7 | −3.0 | 94,843 | |
| 77 | Dutchess County, NY | 17.4% | D D+5.4 | −4.3 | 152,659 | |
| 78 | Tioga County, NY | 17.4% | R R+22.8 | −2.2 | 24,559 | |
| 79 | Washington County, VT | 17.4% | D D+43.0 | −3.1 | 35,369 | |
| 80 | Lake County, OH | 17.3% | R R+14.3 | −0.7 | 128,579 | |
| 81 | Doddridge County, WV | 17.3% | R R+73.3 | −2.9 | 2,956 | |
| 82 | Calaveras County, CA | 17.2% | R R+28.1 | −4.4 | 26,479 | |
| 83 | Saline County, IL | 17.2% | R R+49.0 | −1.1 | 10,605 | |
| 84 | Ocean County, NJ | 17.2% | R R+36.0 | −7.1 | 337,135 | |
| 85 | Broome County, NY | 17.2% | D D+0.4 | −3.0 | 90,459 | |
| 86 | Schoharie County, NY | 17.2% | R R+30.4 | −1.3 | 16,042 | |
| 87 | Harrison County, WV | 17.2% | R R+40.9 | −3.3 | 29,495 | |
| 88 | Valley County, ID | 17.1% | R R+18.6 | −4.8 | 7,240 | |
| 89 | Kent County, MD | 17.1% | R R+2.8 | −4.0 | 11,128 | |
| 90 | Worcester County, MA | 17.1% | D D+10.0 | −7.8 | 420,841 | |
| 91 | Box Butte County, NE | 17.1% | R R+56.4 | +0.4 | 4,937 | |
| 92 | Grafton County, NH | 17.1% | D D+19.8 | −4.7 | 55,898 | |
| 93 | Livingston County, NY | 17.1% | R R+21.4 | −3.2 | 31,035 | |
| 94 | Rappahannock County, VA | 17.1% | R R+17.8 | −3.4 | 5,065 | |
| 95 | Marion County, WV | 17.1% | R R+31.2 | −2.6 | 24,634 | |
| 96 | Franklin County, FL | 17.0% | R R+43.8 | −6.5 | 6,758 | |
| 97 | Newton County, IN | 17.0% | R R+56.9 | −4.8 | 6,608 | |
| 98 | Blair County, PA | 17.0% | R R+43.5 | +0.1 | 64,949 | |
| 99 | Hancock County, ME | 16.9% | D D+11.8 | −0.5 | 36,253 | |
| 100 | Franklin County, MA | 16.9% | D D+37.6 | −6.2 | 42,248 |
Source. Demographics — U.S. Census American Community Survey 2024 5-year (ancestry B04006, language C16001, income B19013/B19001, education S1501, poverty S1701); adherence — 2020 U.S. Religion Census (ASARB); density — Census TIGER land area · counties and cities ≥ 5,000 population, ranked by irish; the medians are taken across the 100 top counties; the correlation is over all 2,824 eligible counties. Presidential results are two-party margins (MIT Election Lab); city results are precinct-derived for 2008–2024. A place can be demographically homogeneous and politically split — which is exactly what these tables are built to show. Real returns — nothing estimated.