RANKING · 2020 CENSUS · 500 SHOWN OF 3,134

Highest Irish population share, US counties · 2020

US counties ranked by the share of all residents who are Irish ancestry (2023 American Community Survey). A concentration measure: Irish residents as a percentage of total population. Cape May County, New Jersey leads at 30.1%. 3,134 counties qualify in total. Pennsylvania carries 5 of the top 25 entries.

All statesAll rankings

SAME RANKING BYCities States Metros

YEAR2010 2020 2024

RANKPLACESTATEPOPIRISH SHAREVS 2000

01Cape May County, NJNJ93,39030.1%–

02Plymouth County, MAMA546,82930.0%–

03Barnstable County, MAMA233,53926.7%–

04Gloucester County, NJNJ312,63826.7%–

05Silver Bow County, MTMT36,11825.6%–

06Norfolk County, MAMA739,74925.5%–

07Washington County, RIRI129,79525.5%–

08Rensselaer County, NYNY160,51025.3%–

09Lackawanna County, PAPA216,50225.2%–

10Rockingham County, NHNH324,07724.5%–

11Delaware County, PAPA580,93724.0%–

12Carroll County, NHNH52,78423.9%–

13Bucks County, PAPA647,82823.9%–

14Kent County, RIRI173,49523.8%–

15Pike County, PAPA62,80823.8%–

16Saratoga County, NYNY241,34323.7%–

17Greeley County, NENE2,15423.4%–

18Newport County, RIRI83,05123.0%–

19Deer Lodge County, MTMT9,70922.1%–

20Cayuga County, NYNY74,36521.9%–

21Warren County, NYNY65,02021.7%–

22Sussex County, NJNJ148,06321.7%–

23Skagway, AKAK1,10421.5%–

24Chester County, PAPA557,11621.4%–

25Dukes County, MAMA21,21921.3%–

26Wheeler County, NENE78921.2%–

27Monmouth County, NJNJ651,03521.2%–

28Hillsborough County, NHNH433,41520.8%–

29Warren County, NJNJ112,95320.8%–

30Strafford County, NHNH135,04320.8%–

31Stone County, ARAR12,70320.7%–

32Albany County, NYNY321,22520.5%–

33Ulster County, NYNY183,33020.4%–

34Putnam County, NYNY99,02820.3%–

35Montgomery County, PAPA877,64320.3%–

36Susquehanna County, PAPA38,23720.2%–

37Ocean County, NJNJ673,74620.2%–

38Dubuque County, IAIA99,38120.2%–

39McIntosh County, OKOK19,75820.2%–

40Essex County, MAMA826,65320.1%–

41Oswego County, NYNY118,56920.1%–

42Fallon County, MTMT2,95919.9%–

43Sullivan County, PAPA5,85619.9%–

44Hardeman County, TXTX3,29219.8%–

45Salem County, NJNJ66,28019.8%–

46Meagher County, MTMT2,13719.8%–

47Butler County, PAPA200,16919.7%–

48Onondaga County, NYNY466,58419.7%–

49Grand County, UTUT9,79019.7%–

50Belknap County, NHNH65,14719.6%–

51Cumberland County, MEME317,22219.6%–

52Powell County, MTMT7,15719.6%–

53Hancock County, WVWV27,72919.5%–

54Mason County, TXTX3,99019.4%–

55Middlesex County, MAMA1,669,97919.3%–

56West Carroll Parish, LALA9,15619.2%–

57Crawford County, WIWI15,91019.1%–

58Hunterdon County, NJNJ131,78119.1%–

59Dutchess County, NYNY300,70819.0%–

60Gallatin County, ILIL4,61619.0%–

61Grant County, NENE56119.0%–

62Monroe County, IAIA7,40618.9%–

63Columbia County, NYNY60,16818.9%–

64Wayne County, PAPA51,70318.9%–

65Livingston County, NYNY61,43818.8%–

66Washington County, NYNY59,35318.8%–

67Delaware County, NYNY44,30518.8%–

68Thomas County, NENE63918.8%–

69Burlington County, NJNJ481,43918.8%–

70Latimer County, OKOK9,64518.8%–

71Izard County, ARAR14,40518.7%–

72Essex County, NYNY36,43818.7%–

73Bristol County, RIRI50,00118.7%–

74Bennington County, VTVT36,63018.7%–

75Merrimack County, NHNH158,07818.5%–

76Worcester County, MAMA888,50218.5%–

77Broome County, NYNY195,73618.4%–

78Palo Alto County, IAIA8,89918.4%–

79York County, MEME222,43418.4%–

80Madison County, MTMT10,02618.4%–

81Franklin County, MAMA70,69818.4%–

82Schoharie County, NYNY30,17618.4%–

83Newton County, ININ14,18818.3%–

84Nowata County, OKOK9,52218.3%–

85Cheshire County, NHNH78,26918.3%–

86Otsego County, NYNY60,58918.3%–

87Chittenden County, VTVT169,11518.2%–

88Franklin County, NYNY46,50018.2%–

89Camden County, NJNJ535,79918.2%–

90Cattaraugus County, NYNY75,39018.1%–

91Grundy County, ILIL54,05218.1%–

92Carroll County, MDMD176,67718.1%–

93Hampshire County, MAMA164,06518.1%–

94Rutland County, VTVT59,65318.1%–

95LaSalle County, ILIL107,77318.0%–

96Ripley County, MOMO10,71717.9%–

97Breckinridge County, KYKY21,50317.9%–

98Bristol County, MAMA593,64017.9%–

99Judith Basin County, MTMT2,16217.9%–

100Clear Creek County, COCO8,99417.9%–

101Upshur County, WVWV23,75817.8%–

102Schuylkill County, PAPA145,08517.8%–

103Essex County, VTVT6,05117.8%–

104Lake County, OHOH232,21717.7%–

105Comanche County, KSKS1,67317.7%–

106Herkimer County, NYNY59,21917.7%–

107Cecil County, MDMD107,13117.7%–

108Garvin County, OKOK26,37717.6%–

109Kiowa County, COCO1,41217.6%–

110Morris County, NJNJ524,25117.6%–

111Teton County, MTMT6,49617.6%–

112Suffolk County, NYNY1,546,09017.6%–

113Broadwater County, MTMT8,49317.6%–

114Schenectady County, NYNY162,58117.6%–

115Trinity County, TXTX14,38417.6%–

116Berkshire County, MAMA128,22417.5%–

117Doddridge County, WVWV7,63417.5%–

118Livingston County, ILIL35,05717.5%–

119Lincoln County, MEME36,59517.5%–

120Luzerne County, PAPA332,12617.5%–

121Jefferson County, MTMT13,32917.5%–

122Keya Paha County, NENE79217.5%–

123Park County, MTMT18,21417.5%–

124Allamakee County, IAIA14,23817.4%–

125Harrison County, WVWV64,22117.4%–

126Lamoille County, VTVT26,29417.4%–

127Lawrence County, PAPA83,91117.4%–

128Chemung County, NYNY80,41517.4%–

129Iowa County, WIWI23,95117.3%–

130Randolph County, ARAR18,87617.3%–

131Allegany County, NYNY46,80017.3%–

132Pocahontas County, IAIA6,81917.3%–

133Towns County, GAGA13,28517.3%–

134Armstrong County, PAPA63,69817.2%–

135Westmoreland County, PAPA349,32417.2%–

136Jo Daviess County, ILIL21,59417.2%–

137Clinton County, IAIA46,00217.2%–

138Worcester County, MDMD54,45917.2%–

139Kenton County, KYKY175,77917.2%–

140Ontario County, NYNY113,13017.1%–

141Allegheny County, PAPA1,225,03517.1%–

142Jones County, IAIA21,25317.1%–

143Cambria County, PAPA128,96817.1%–

144Holt County, NENE10,06717.1%–

145Washington County, VTVT59,65217.1%–

146Menard County, TXTX1,95617.0%–

147Barbour County, WVWV15,41417.0%–

148Mariposa County, CACA16,91817.0%–

149Madison County, NYNY67,12017.0%–

150Falls Church, VAVA15,15916.9%–

151DeKalb County, MOMO9,79516.9%–

152Fall River County, SDSD7,46716.9%–

153Pittsburg County, OKOK43,32016.9%–

154Schuyler County, NYNY16,92416.9%–

155Lewis and Clark County, MTMT75,33116.9%–

156Hamilton County, NYNY5,00616.8%–

157Wyoming County, PAPA25,79016.8%–

158Blair County, PAPA119,54116.8%–

159Seneca County, NYNY32,88316.8%–

160Reynolds County, MOMO5,99216.7%–

161Hooker County, NENE68616.7%–

162Portage County, OHOH163,40416.7%–

163Poweshiek County, IAIA18,36816.7%–

164Mineral County, MTMT5,18516.7%–

165Tioga County, NYNY47,45316.7%–

166Jefferson County, OHOH63,59716.7%–

167Dade County, GAGA16,15416.7%–

168McHenry County, ILIL317,75116.7%–

169Windham County, VTVT45,20416.7%–

170Mineral County, COCO91016.6%–

171Medina County, OHOH185,02516.6%–

172Washington County, PAPA210,80216.6%–

173Burt County, NENE6,67816.6%–

174Steuben County, NYNY91,85516.5%–

175Piscataquis County, MEME17,40916.5%–

176Garfield County, NENE1,71016.5%–

177Sterling County, TXTX1,34916.4%–

178Sussex County, DEDE277,14016.4%–

179Talbot County, MDMD38,23816.4%–

180Fayette County, PAPA123,02116.4%–

181Gilchrist County, FLFL20,48816.4%–

182Beaver County, PAPA166,03216.3%–

183St. Charles County, MOMO426,49916.3%–

184Ohio County, WVWV40,49616.3%–

185Gilpin County, COCO6,07316.3%–

186McKean County, PAPA38,98416.3%–

187Erie County, NYNY946,74116.3%–

188Nance County, NENE3,29016.3%–

189Oxford County, MEME60,34616.2%–

190Campbell County, KYKY95,44116.2%–

191Blanco County, TXTX13,58116.2%–

192Martin County, FLFL166,27216.2%–

193McPherson County, NENE36916.2%–

194Meade County, KYKY30,69916.2%–

195Penobscot County, MEME157,96716.2%–

196Mercer County, PAPA107,86016.1%–

197Niobrara County, WYWY2,34116.1%–

198Fannin County, GAGA26,11116.1%–

199Rio Blanco County, COCO6,68316.1%–

200Venango County, PAPA49,34616.1%–

201Calaveras County, CACA46,60516.0%–

202Sullivan County, NYNY80,58616.0%–

203Marshall County, ILIL11,47316.0%–

204Kennebec County, MEME129,06716.0%–

205Gilmer County, GAGA33,89416.0%–

206Perry County, OHOH35,91816.0%–

207Beaverhead County, MTMT10,04316.0%–

208Orleans County, NYNY39,82516.0%–

209Wheeler County, OROR1,47215.9%–

210Arthur County, NENE39615.9%–

211Addison County, VTVT38,04815.9%–

212Boone County, KYKY145,31615.9%–

213Throckmorton County, TXTX1,55415.9%–

214Clay County, KSKS7,99015.9%–

215Wyoming County, NYNY39,74115.9%–

216Real County, TXTX2,74515.9%–

217Washington County, MOMO23,81015.9%–

218Boone County, ARAR38,62815.9%–

219Chenango County, NYNY45,71515.9%–

220Wayne County, NENE10,02015.9%–

221Butte County, SDSD10,85615.9%–

222Dixon County, NENE5,60215.9%–

223Crawford County, PAPA81,79215.9%–

224Motley County, TXTX1,04315.9%–

225Jefferson County, NYNY111,54015.9%–

226Adams County, IAIA3,61715.8%–

227Van Buren County, ARAR16,23815.8%–

228Delaware County, IAIA17,67415.8%–

229Blount County, ALAL60,15615.8%–

230Coos County, NHNH31,34315.8%–

231Little River County, ARAR11,76315.7%–

232Converse County, WYWY13,82415.7%–

233Randolph County, WVWV26,88215.7%–

234Greene County, NYNY47,23815.7%–

235Harford County, MDMD266,44615.7%–

236Pickens County, GAGA37,16715.7%–

237Grafton County, NHNH93,22515.7%–

238Ferry County, WAWA7,51715.7%–

239Scott County, IAIA175,25915.7%–

240Marion County, WVWV55,58415.7%–

241Orange County, VAVA40,08315.6%–

242Nantucket County, MAMA14,75815.6%–

243McMullen County, TXTX54415.6%–

244Atlantic County, NJNJ278,65715.6%–

245Carter County, MOMO5,41815.6%–

246Erie County, PAPA265,83215.6%–

247Wayne County, NYNY91,25015.6%–

248Haskell County, OKOK11,78715.6%–

249Stark County, ILIL5,31915.6%–

250Queen Anne's County, MDMD54,44815.6%–

251St. Mary's County, MDMD116,69215.5%–

252Niagara County, NYNY208,91215.5%–

253Windsor County, VTVT57,31215.5%–

254Lafayette County, WIWI17,47815.5%–

255Carbon County, PAPA65,86815.5%–

256Tuolumne County, CACA53,16015.5%–

257Chugach Census Area, AKAK6,55315.4%–

258Lee County, ILIL32,91415.4%–

259Clarion County, PAPA36,68015.4%–

260Brooke County, WVWV21,14215.4%–

261Harrison County, IAIA14,62315.4%–

262Monona County, IAIA8,53915.4%–

263Madison County, OHOH46,98515.3%–

264Grant County, KYKY26,18115.3%–

265Calhoun County, FLFL13,28915.3%–

266Clinton County, NYNY78,13815.3%–

267Faulk County, SDSD2,17815.3%–

268Columbiana County, OHOH99,37715.3%–

269Leon County, TXTX16,89415.3%–

270Missoula County, MTMT123,51315.3%–

271Maries County, MOMO8,39715.3%–

272Piatt County, ILIL16,79115.3%–

273Delaware County, OHOH242,03215.2%–

274Crawford County, MIMI13,72215.2%–

275Jackson County, IAIA19,28815.2%–

276Pershing County, NVNV6,42115.2%–

277Harris County, GAGA37,28015.2%–

278Genesee County, NYNY58,41615.2%–

279Champaign County, OHOH38,82015.2%–

280Nicholas County, WVWV23,84815.2%–

281Jefferson County, MOMO233,13215.2%–

282Decatur County, KSKS2,71615.1%–

283Porter County, ININ176,04915.1%–

284Orange County, VTVT30,00215.1%–

285Kent County, MDMD19,56515.1%–

286Adair County, IAIA7,40315.1%–

287Crawford County, ININ10,50915.1%–

288Richland County, WIWI17,03615.1%–

289Garrett County, MDMD28,37015.1%–

290Hamilton County, NENE9,67815.1%–

291Lake County, OROR8,18715.1%–

292Blackford County, ININ11,73015.1%–

293Braxton County, WVWV11,88515.1%–

294Cloud County, KSKS8,83315.1%–

295Lincoln County, KSKS2,86115.1%–

296Trimble County, KYKY8,70115.1%–

297Franklin County, KSKS26,29915.1%–

298Buchanan County, IAIA20,88315.0%–

299Greenwood County, KSKS5,82615.0%–

300Linn County, KSKS9,95015.0%–

301Miami County, KSKS36,24015.0%–

302Franklin County, MOMO108,09015.0%–

303Belmont County, OHOH64,43415.0%–

304Greene County, ARAR47,41115.0%–

305Clay County, SDSD15,03115.0%–

306Roger Mills County, OKOK3,25915.0%–

307Hickory County, MOMO9,04415.0%–

308Calvert County, MDMD94,48415.0%–

309Shiawassee County, MIMI67,68115.0%–

310Montgomery County, ININ38,95414.9%–

311Fulton County, ARAR12,49214.9%–

312Gunnison County, COCO17,43914.9%–

313Brown County, NENE2,82614.9%–

314Charlevoix County, MIMI26,03614.9%–

315Hancock County, MEME57,17114.9%–

316Kiowa County, OKOK8,18114.9%–

317Fulton County, OHOH41,85314.9%–

318Madison County, IAIA17,27014.9%–

319Bradford County, PAPA59,60014.9%–

320Llano County, TXTX23,35314.9%–

321Tripp County, SDSD5,70814.9%–

322Ravalli County, MTMT48,58214.9%–

323Saline County, ILIL22,77214.9%–

324Iroquois County, ILIL26,15014.9%–

325Mason County, ILIL12,41114.9%–

326Indiana County, PAPA82,87814.9%–

327Knox County, ILIL47,76714.9%–

328Berkeley County, WVWV139,52214.8%–

329White County, GAGA29,80214.8%–

330Furnas County, NENE4,52414.8%–

331Washington County, MEME31,33414.8%–

332Marion County, ARAR17,59314.8%–

333Franklin County, KYKY52,64914.8%–

334Washington County, NENE21,30214.8%–

335Livingston County, MIMI197,31514.8%–

336Teton County, WYWY23,33314.8%–

337Licking County, OHOH185,56414.8%–

338Valley County, IDID12,83114.8%–

339Storey County, NVNV4,26014.8%–

340Polk County, TNTN18,59214.8%–

341DeKalb County, ILIL101,83514.8%–

342New Madrid County, MOMO15,08614.8%–

343Sharp County, ARAR18,12214.8%–

344Jefferson County, WVWV63,10214.8%–

345Logan County, ILIL27,18214.7%–

346Lewis County, NYNY26,47914.7%–

347Franklin County, MEME30,82414.7%–

348Sumter County, FLFL157,77214.7%–

349McLean County, ILIL171,41914.7%–

350Atchison County, KSKS16,17214.7%–

351Mahoning County, OHOH224,70614.7%–

352Tazewell County, VAVA38,63514.7%–

353Powder River County, MTMT1,78114.7%–

354Bosque County, TXTX18,91814.7%–

355Will County, ILIL712,25314.7%–

356Bullitt County, KYKY86,45414.6%–

357Crittenden County, KYKY8,80714.6%–

358Dawson County, MTMT8,69214.6%–

359Crawford County, MOMO22,92914.6%–

360Gilliam County, OROR1,97114.6%–

361Carbon County, WYWY14,01314.6%–

362Archuleta County, COCO14,30614.6%–

363Greene County, PAPA33,88514.6%–

364Sagadahoc County, MEME37,97914.6%–

365Marshall County, OKOK16,25514.6%–

366Johnson County, KSKS636,90614.6%–

367Meigs County, TNTN14,18614.6%–

368Boone County, NENE5,35514.6%–

369Jasper County, IAIA38,15314.5%–

370Jackson County, MIMI159,55214.5%–

371Keokuk County, IAIA9,79714.5%–

372White County, ILIL13,25014.5%–

373Androscoggin County, MEME116,48714.5%–

374Pottawatomie County, KSKS27,18614.5%–

375Otsego County, MIMI26,08014.5%–

376Marshall County, WVWV29,15914.5%–

377Shoshone County, IDID14,13014.5%–

378Warren County, MOMO39,01614.5%–

379Norton County, KSKS5,28814.5%–

380Grand Isle County, VTVT7,51114.5%–

381Mayes County, OKOK40,41614.5%–

382Hinsdale County, COCO75314.5%–

383Teller County, COCO24,75614.5%–

384Pocahontas County, WVWV7,60214.4%–

385St. Lawrence County, NYNY105,48814.4%–

386Custer County, MTMT12,03414.4%–

387Knox County, OHOH64,00214.4%–

388Bourbon County, KSKS14,31914.4%–

389Hampden County, MAMA464,33814.4%–

390Deschutes County, OROR213,07214.4%–

391Citrus County, FLFL171,66614.4%–

392Cortland County, NYNY45,85014.4%–

393Linn County, IAIA232,02814.4%–

394Edgar County, ILIL16,32314.4%–

395Greene County, IAIA8,65814.4%–

396Oneida County, NYNY226,39214.4%–

397Meigs County, OHOH21,58714.3%–

398Fayette County, IAIA19,04714.3%–

399Lee County, IAIA32,30614.3%–

400Iowa County, IAIA16,50414.3%–

401Rappahannock County, VAVA7,43914.3%–

402Union County, GAGA27,85914.3%–

403Platte County, MOMO114,40014.3%–

404Daniels County, MTMT1,61214.3%–

405Menard County, ILIL11,86314.3%–

406Kendall County, ILIL145,47014.3%–

407Greenbrier County, WVWV31,57814.3%–

408Cleburne County, ARAR25,67214.3%–

409Athens County, OHOH63,19714.3%–

410Osage County, KSKS15,69314.3%–

411Grand Traverse County, MIMI96,72914.3%–

412Lincoln County, NVNV4,32014.3%–

413Monongalia County, WVWV107,99114.3%–

414Cherry County, NENE5,56114.3%–

415Crawford County, KSKS39,00814.3%–

416Curry County, OROR22,62114.3%–

417Onslow County, NCNC217,17514.2%–

418Calhoun County, WVWV5,97814.2%–

419Cheboygan County, MIMI25,79314.2%–

420Wheatland County, MTMT2,10014.2%–

421Mills County, IAIA14,79314.2%–

422Lorain County, OHOH323,21914.2%–

423Anne Arundel County, MDMD603,38014.2%–

424Johnson County, MOMO56,67014.2%–

425Aroostook County, MEME66,60914.2%–

426Logan County, NENE66914.2%–

427Searcy County, ARAR7,84814.2%–

428Yavapai County, AZAZ252,55214.2%–

429Summers County, WVWV11,53214.1%–

430Antrim County, MIMI24,69814.1%–

431Warren County, OHOH257,18114.1%–

432Coshocton County, OHOH37,18814.1%–

433Benton County, IAIA26,00414.1%–

434Wabasha County, MNMN21,53714.1%–

435Monroe County, NYNY750,50614.1%–

436Warren County, PAPA37,03814.1%–

437Cass County, IAIA12,96014.1%–

438Moffat County, COCO13,12214.1%–

439Morgan County, WVWV18,02714.1%–

440Pulaski County, ININ12,46314.1%–

441Stark County, OHOH373,77114.1%–

442Clinton County, MOMO21,66114.1%–

443Cedar County, IAIA18,35914.1%–

444Garden County, NENE1,80414.0%–

445DuPage County, ILIL934,29814.0%–

446Floyd County, IAIA14,90114.0%–

447Gasconade County, MOMO14,78414.0%–

448Orange County, NYNY417,66914.0%–

449Tillamook County, OROR27,38414.0%–

450Juneau County, WIWI26,64914.0%–

451Somerset County, MEME51,62014.0%–

452Caldwell Parish, LALA9,34414.0%–

453Lexington, VAVA7,76914.0%–

454Rock County, WIWI166,47214.0%–

455Clermont County, OHOH216,97714.0%–

456Jefferson County, KSKS18,29614.0%–

457Houston County, TNTN8,47914.0%–

458Harper County, OKOK3,17214.0%–

459Wirt County, WVWV4,87914.0%–

460Warren County, VAVA42,74014.0%–

461Cullman County, ALAL94,00914.0%–

462Kidder County, NDND2,39313.9%–

463Montmorency County, MIMI9,84213.9%–

464Kimball County, NENE3,39113.9%–

465Fulton County, NYNY52,21613.9%–

466Knox County, MEME41,11713.9%–

467Perry County, MSMS11,57713.9%–

468Montgomery County, KSKS30,17713.9%–

469Ogle County, ILIL51,39913.9%–

470Taylor County, WVWV16,28713.9%–

471Caledonia County, VTVT30,41413.9%–

472Montgomery County, NYNY50,04613.9%–

473Adams County, IDID5,01313.9%–

474Ringgold County, IAIA4,64213.9%–

475Hardin County, ILIL3,58813.9%–

476Florence County, WIWI4,74813.8%–

477Gallatin County, MTMT128,74013.8%–

478Dearborn County, ININ51,60913.8%–

479San Saba County, TXTX5,78713.8%–

480Monroe County, PAPA167,17913.8%–

481Donley County, TXTX3,21313.8%–

482Johnston County, OKOK10,44813.8%–

483Alcona County, MIMI10,55613.8%–

484Mineral County, WVWV26,79213.8%–

485Bonner County, IDID54,42013.8%–

486Dunklin County, MOMO26,85513.8%–

487Pottawattamie County, IAIA92,99613.8%–

488Beaver County, OKOK4,88213.8%–

489Wood County, OHOH134,17613.8%–

490Oldham County, KYKY70,98613.8%–

491Lycoming County, PAPA112,58713.8%–

492Wayne County, TNTN16,41613.8%–

493La Crosse County, WIWI121,33913.8%–

494Christian County, MOMO96,72513.8%–

495Randolph County, MOMO24,51313.8%–

496Bledsoe County, TNTN15,92013.7%–

497Washington County, IAIA22,66713.7%–

498Haines, AKAK2,06813.7%–

499Clay County, NENE6,17013.7%–

500Jefferson County, WAWA33,97013.7%–

SHOWING 1–500 OF 3,134

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Download CSV (full list, 3,134 rows)

UPDATED 2026-06-06 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES

Frequently asked

Which county has the highest irish share?

Cape May County, New Jersey ranks #1 with 30.1% (2020 American Community Survey).

What are the top 5 counties by irish share?

Cape May County, New Jersey, Plymouth County, Massachusetts, Barnstable County, Massachusetts, Gloucester County, New Jersey, Silver Bow County, Montana.

How many counties are in this ranking?

3,134 counties qualify after filtering for population minimums and data availability. The ranking covers 2020 ACS 5-year data.

How is irish share measured?

Share of all residents who are Irish ancestry (Ancestry, ACS detailed tables). Source: US Census Bureau, American Community Survey 5-year estimates (2020).