| Rank | Irish as First Ancestry Population Percentage ▼ | School District / Population |
| 1. | 32.8% | Sidney Community School District / 1,763 |
| 2. | 29.6% | Dallas Center-Grimes Community School District / 10,585 |
| 3. | 28.3% | West Harrison Community School District / 2,996 |
| 4. | 27.5% | Albia Community School District / 7,346 |
| 5. | 27.2% | Martensdale-St. Marys Community School District / 2,649 |
| 6. | 27.1% | Calamus-Wheatland Community School District / 2,420 |
| 7. | 26.8% | Villisca Community School District / 2,221 |
| 8. | 26.5% | North Linn Community School District / 3,624 |
| 9. | 26.4% | Dubuque Community School District / 75,820 |
| 10. | 25.7% | West Branch Community School District / 4,163 |
| 11. | 25.6% | Maple Valley Community School District / 2,868 |
| 12. | 25.2% | Western Dubuque Community School District / 21,364 |
| 13. | 24.9% | Keokuk Community School District / 12,795 |
| 14. | 24.7% | Winterset Community School District / 9,165 |
| 15. | 24.5% | Washington Community School District / 9,965 |
| 16. | 24.3% | Moravia Community School District / 2,305 |
| 17. | 24.3% | Independence Community School District / 8,881 |
| 18. | 24.2% | Monticello Community School District / 6,540 |
| 19. | 24.0% | Eastern Allamakee Community School District / 2,670 |
| 20. | 23.9% | South Page Community School District / 1,448 |
| 21. | 23.9% | Montezuma Community School District / 3,465 |
| 22. | 23.8% | Marion Independent School District / 11,702 |
| 23. | 23.7% | Central Clinton Community School District / 9,305 |
| 24. | 23.7% | Paton-Churdan Community School District / 1,135 |
| 25. | 23.6% | East Greene Community School District / 1,736 |
| 26. | 23.6% | Pekin Community School District / 3,896 |
| 27. | 23.6% | Danville Community School District / 2,580 |
| 28. | 23.5% | Woodward-Granger Community School District / 5,062 |
| 29. | 23.3% | Delwood Community School District / 1,190 |
| 30. | 23.1% | Andrew Community School District / 1,651 |
| 31. | 23.1% | Southeast Warren Community School District / 3,204 |
| 32. | 23.0% | Anamosa Community School District / 9,281 |
| 33. | 22.9% | Essex Community School District / 1,414 |
| 34. | 22.9% | Prescott Community School District / 654 |
| 35. | 22.9% | Earlham Community School District / 3,209 |
| 36. | 22.5% | Waco Community School District / 3,213 |
| 37. | 22.5% | Bedford Community School District / 3,158 |
| 38. | 22.5% | Logan-Magnolia Community School District / 3,094 |
| 39. | 22.4% | English Valleys Community School District / 2,912 |
| 40. | 22.4% | West Delaware County Community School District / 9,416 |
| 41. | 22.3% | Malvern Community School District / 3,346 |
| 42. | 22.3% | Mediapolis Community School District / 5,026 |
| 43. | 22.2% | Allamakee Community School District / 8,769 |
| 44. | 22.1% | West Bend-Mallard Community School District / 1,911 |
| 45. | 22.0% | Bondurant-Farrar Community School District / 6,812 |
| 46. | 21.9% | Moulton-Udell Community School District / 1,576 |
| 47. | 21.9% | Tri-County Community School District / 1,794 |
| 48. | 21.8% | Norwalk Community School District / 11,270 |
| 49. | 21.7% | Tri-Center Community School District / 3,507 |
| 50. | 21.6% | Highland Community School District / 4,060 |
| 51. | 21.6% | Lu Verne Community School District / 479 |
| 52. | 21.5% | Emmetsburg Community School District / 5,062 |
| 53. | 21.5% | East Marshall Community School District / 3,657 |
| 54. | 21.5% | Carlisle Community School District / 8,501 |
| 55. | 21.3% | Springville Community School District / 2,421 |
| 56. | 21.3% | Manson Northwest Webster Community School District / 4,203 |
| 57. | 21.2% | Louisa-Muscatine Community School District / 4,777 |
| 58. | 21.2% | Clinton Community School District / 26,242 |
| 59. | 21.2% | Lewis Central Community School District / 15,042 |
| 60. | 21.1% | Charter Oak-Ute Community School District / 1,895 |
| 61. | 21.1% | Pleasant Valley Community School District / 20,478 |
| 62. | 21.1% | Anthon-Oto Community School District / 1,741 |
| 63. | 21.1% | H-L-V Community School District / 2,162 |
| 64. | 21.1% | Camanche Community School District / 5,615 |
| 65. | 21.0% | Clear Creek-Amana Community School District / 11,260 |
| 65. | 21.0% | Van Meter Community School District / 3,162 |
| 67. | 20.9% | Knoxville Community School District / 11,527 |
| 68. | 20.9% | Central Community School District / 3,451 |
| 69. | 20.8% | Center Point-Urbana Community School District / 5,773 |
| 70. | 20.8% | Cedar Rapids Community School District / 119,948 |
| 71. | 20.7% | Westwood Community School District / 2,738 |
| 72. | 20.6% | Missouri Valley Community School District / 5,042 |
| 73. | 20.6% | Fort Dodge Community School District / 29,326 |
| 74. | 20.6% | Clarke Community School District / 7,970 |
| 75. | 20.6% | Creston Community School District / 9,577 |
| 76. | 20.5% | West Monona Community School District / 4,438 |
| 77. | 20.4% | Bellevue Community School District / 4,841 |
| 78. | 20.3% | PCM Community School District / 5,079 |
| 78. | 20.3% | Linn-Mar Community School District / 36,660 |
| 78. | 20.3% | Marcus-Meriden-Cleghorn Community School District / 2,750 |
| 81. | 20.3% | Oelwein Community School District / 9,113 |
| 82. | 20.2% | Interstate 35 Community School District / 4,746 |
| 83. | 20.2% | Midland Community School District / 3,628 |
| 84. | 20.2% | Colfax-Mingo Community School District / 4,669 |
| 85. | 20.2% | Mount Vernon Community School District / 6,558 |
| 86. | 20.1% | Iowa Valley Community School District / 3,832 |
| 86. | 20.1% | West Burlington Independent School District / 2,853 |
| 88. | 20.1% | Algona Community School District / 9,227 |
| 89. | 20.0% | Bettendorf Community School District / 22,145 |
| 90. | 20.0% | Benton Community School District / 9,021 |
| 91. | 20.0% | Sergeant Bluff-Luton Community School District / 5,997 |
| 92. | 19.9% | Cardinal Community School District / 4,419 |
| 93. | 19.8% | Mount Ayr Community School District / 4,167 |
| 94. | 19.7% | Fremont-Mills Community School District / 2,772 |
| 95. | 19.7% | Iowa City Community School District / 106,668 |
| 96. | 19.7% | Oskaloosa Community School District / 15,898 |
| 97. | 19.7% | Farragut Community School District / 1,636 |
| 98. | 19.6% | Cherokee Community School District / 6,485 |
| 98. | 19.6% | Galva-Holstein Community School District / 2,763 |
| 100. | 19.5% | Shenandoah Community School District / 6,309 |
| 101. | 19.5% | Mormon Trail Community School District / 1,729 |
| 102. | 19.5% | Grinnell-Newburg Community School District / 12,522 |
| 103. | 19.5% | Woodbury Central Community School District / 2,879 |
| 104. | 19.4% | Orient-Macksburg Community School District / 1,258 |
| 105. | 19.4% | Keota Community School District / 1,995 |
| 106. | 19.4% | North Central Community School District / 5,591 |
| 107. | 19.4% | Woodbine Community School District / 2,484 |
| 108. | 19.4% | East Buchanan Community School District / 3,047 |
| 108. | 19.4% | Ruthven-Ayrshire Community School District / 1,593 |
| 110. | 19.4% | Laurens-Marathon Community School District / 2,197 |
| 111. | 19.3% | Indianola Community School District / 19,809 |
| 111. | 19.3% | Maquoketa Valley Community School District / 4,495 |
| 113. | 19.3% | Fort Madison Community School District / 17,063 |
| 114. | 19.3% | Council Bluffs Community School District / 60,187 |
| 115. | 19.3% | C and M Community School District / 3,263 |
| 116. | 19.2% | Fremont Community School District / 1,058 |
| 117. | 19.2% | College Community School District / 23,841 |
| 118. | 19.1% | Ottumwa Community School District / 28,755 |
| 119. | 19.1% | Ar-We-Va Community School District / 2,156 |
| 120. | 19.1% | Stanton Community School District / 1,189 |
| 121. | 19.0% | Sigourney Community School District / 3,616 |
| 122. | 19.0% | Chariton Community School District / 8,372 |
| 123. | 18.9% | Preston Community School District / 1,901 |
| 124. | 18.9% | Hinton Community School District / 2,904 |
| 125. | 18.7% | Solon Community School District / 6,561 |
| 126. | 18.6% | Mount Pleasant Community School District / 12,932 |
| 127. | 18.6% | North Scott Community School District / 15,310 |
| 128. | 18.6% | Central Decatur Community School District / 4,291 |
| 129. | 18.5% | Pocahontas Area Community School District / 3,545 |
| 130. | 18.4% | Iowa Falls Community School District / 6,886 |
| 131. | 18.4% | Urbandale Community School District / 21,268 |
| 132. | 18.4% | Williamsburg Community School District / 6,098 |
| 133. | 18.4% | Ballard Community School District / 7,383 |
| 134. | 18.3% | North Winneshiek Community School District / 2,124 |
| 135. | 18.2% | Murray Community School District / 1,430 |
| 136. | 18.1% | Adair-Casey Community School District / 2,049 |
| 137. | 18.1% | Akron-Westfield Community School District / 3,235 |
| 138. | 18.1% | Lamoni Community School District / 3,049 |
| 139. | 18.0% | Van Buren Community School District / 5,312 |
| 140. | 18.0% | Panorama Community School District / 4,443 |
| 141. | 18.0% | Lawton-Bronson Community School District / 3,245 |
| 142. | 18.0% | Eagle Grove Community School District / 4,701 |
| 143. | 17.8% | Centerville Community School District / 9,023 |
| 144. | 17.8% | Waukee Community School District / 36,979 |
| 145. | 17.8% | Red Oak Community School District / 7,016 |
| 146. | 17.7% | Davenport Community School District / 106,768 |
| 147. | 17.7% | West Des Moines Community School District / 65,061 |
| 148. | 17.7% | Brooklyn-Guernsey-Malcom Community School District / 3,210 |
| 149. | 17.7% | Newton Community School District / 21,168 |
| 150. | 17.7% | Guthrie Center Community School District / 2,813 |
| 151. | 17.6% | Seymour Community School District / 2,322 |
| 152. | 17.5% | Burlington Community School District / 29,950 |
| 153. | 17.5% | Union Community School District / 6,821 |
| 154. | 17.4% | Jefferson-Scranton Community School District / 6,151 |
| 155. | 17.4% | Madrid Community School District / 3,349 |
| 156. | 17.4% | Belle Plaine Community School District / 3,160 |
| 157. | 17.3% | Southeast Polk Community School District / 31,352 |
| 158. | 17.2% | Clay Central-Everly Community School District / 2,177 |
| 159. | 17.2% | Glidden-Ralston Community School District / 2,078 |
| 160. | 17.2% | Grundy Center Community School District / 3,870 |
| 161. | 17.2% | United Community School District / 2,090 |
| 162. | 17.1% | Sioux City Community School District / 83,093 |
| 163. | 17.1% | Lisbon Community School District / 2,910 |
| 164. | 17.1% | Ankeny Community School District / 49,867 |
| 164. | 17.1% | Hamburg Community School District / 1,634 |
| 166. | 17.1% | Osage Community School District / 5,904 |
| 167. | 17.1% | Southeast Webster-Grand Community School District / 3,565 |
| 168. | 17.0% | East Union Community School District / 3,265 |
| 168. | 17.0% | Boyer Valley Community School District / 2,817 |
| 170. | 17.0% | Prairie Valley Community School District / 4,045 |
| 170. | 17.0% | Boone Community School District / 14,545 |
| 172. | 17.0% | Rockwell City-Lytton Community School District / 3,410 |
| 173. | 16.9% | Newell-Fonda Community School District / 2,452 |
| 174. | 16.9% | Tipton Community School District / 5,143 |
| 175. | 16.9% | Wayne Community School District / 3,986 |
| 176. | 16.8% | Vinton-Shellsburg Community School District / 10,549 |
| 177. | 16.8% | West Marshall Community School District / 4,567 |
| 178. | 16.7% | Ogden Community School District / 3,806 |
| 179. | 16.6% | Mason City Community School District / 28,931 |
| 180. | 16.6% | Saydel Community School District / 7,968 |
| 181. | 16.6% | Johnston Community School District / 30,545 |
| 182. | 16.5% | Sheffield Chapin Meservey Thornton Community School District / 4,835 |
| 182. | 16.5% | Hudson Community School District / 3,494 |
| 184. | 16.5% | Des Moines Independent Community School District / 203,403 |
| 185. | 16.5% | Exira Community School District / 1,770 |
| 185. | 16.5% | North Kossuth Community School District / 2,392 |
| 187. | 16.4% | Central City Community School District / 2,758 |
| 188. | 16.4% | North Polk Community School District / 6,518 |
| 189. | 16.3% | West Central Valley Community School District / 5,683 |
| 190. | 16.3% | Nodaway Valley Community School District / 4,188 |
| 191. | 16.3% | River Valley Community School District / 2,720 |
| 192. | 16.3% | Twin Rivers Community School District / 1,206 |
| 193. | 16.2% | Spencer Community School District / 12,976 |
| 194. | 16.2% | Maquoketa Community School District / 8,924 |
| 195. | 16.2% | North Mahaska Community School District / 2,954 |
| 196. | 16.1% | Valley Community School District / 3,063 |
| 196. | 16.1% | MFL MarMac Community School District / 5,639 |
| 198. | 16.0% | West Liberty Community School District / 6,173 |
| 199. | 15.9% | Underwood Community School District / 3,784 |
| 200. | 15.9% | Muscatine Community School District / 29,260 |
| 201. | 15.9% | Clearfield Community School District / 662 |
| 202. | 15.9% | Howard-Winneshiek Community School District / 8,729 |
| 203. | 15.9% | Harris-Lake Park Community School District / 1,928 |
| 204. | 15.8% | Battle Creek-Ida Grove Community School District / 3,919 |
| 204. | 15.8% | Hubbard-Radcliffe Community School District / 2,738 |
| 206. | 15.8% | Griswold Community School District / 3,410 |
| 207. | 15.8% | Twin Cedars Community School District / 2,478 |
| 208. | 15.6% | Carroll Community School District / 14,182 |
| 209. | 15.6% | Bennett Community School District / 1,215 |
| 210. | 15.5% | Alburnett Community School District / 3,789 |
| 211. | 15.4% | Estherville Lincoln Central Community School District / 8,093 |
| 212. | 15.4% | Olin Consolidated School District / 1,540 |
| 213. | 15.4% | Waterloo Community School District / 77,879 |
| 214. | 15.3% | Atlantic Community School District / 8,481 |
| 215. | 15.3% | Wilton Community School District / 4,192 |
| 216. | 15.2% | New Hampton Community School District / 7,244 |
| 217. | 15.1% | Nevada Community School District / 8,187 |
| 218. | 15.1% | Spirit Lake Community School District / 8,262 |
| 219. | 15.1% | Forest City Community School District / 6,688 |
| 220. | 15.1% | Clarinda Community School District / 7,422 |
| 221. | 15.1% | Northeast Hamilton Community School District / 1,504 |
| 222. | 15.0% | Decorah Community School District / 11,717 |
| 223. | 15.0% | Jesup Community School District / 5,555 |
| 224. | 14.9% | New London Community School District / 2,882 |
| 225. | 14.9% | Wapsie Valley Community School District / 3,925 |
| 226. | 14.7% | West Central Community School District / 1,658 |
| 227. | 14.7% | Pleasantville Community School District / 3,401 |
| 228. | 14.7% | Winfield-Mount Union Community School District / 1,815 |
| 229. | 14.6% | Kingsley-Pierson Community School District / 2,621 |
| 230. | 14.6% | Rudd-Rockford-Marble Rock Community School District / 3,091 |
| 231. | 14.6% | Graettinger Community School District / 2,211 |
| 232. | 14.5% | Corning Community School District / 2,877 |
| 232. | 14.5% | Wapello Community School District / 3,532 |
| 234. | 14.5% | Ames Community School District / 56,587 |
| 234. | 14.5% | North Cedar Community School District / 5,092 |
| 234. | 14.5% | Dike-New Hartford Community School District / 4,438 |
| 237. | 14.5% | Adel-De Soto-Minburn Community School District / 8,103 |
| 238. | 14.5% | Fredericksburg Community School District / 1,676 |
| 239. | 14.4% | Eldora-New Providence Community School District / 3,785 |
| 239. | 14.4% | Cedar Falls Community School District / 40,441 |
| 241. | 14.4% | Whiting Community School District / 1,101 |
| 242. | 14.3% | Marshalltown Community School District / 30,646 |
| 242. | 14.3% | Sioux Central Community School District / 2,831 |
| 244. | 14.2% | Treynor Community School District / 2,990 |
| 244. | 14.2% | Southern Cal Community School District / 2,907 |
| 246. | 14.2% | North Fayette Community School District / 6,092 |
| 247. | 14.2% | Janesville Consolidated School District / 2,476 |
| 248. | 14.1% | Gilmore City-Bradgate Community School District / 1,015 |
| 249. | 13.9% | Diagonal Community School District / 686 |
| 250. | 13.9% | Waverly-Shell Rock Community School District / 13,637 |
| 251. | 13.9% | Harlan Community School District / 9,058 |
| 252. | 13.8% | Gladbrook-Reinbeck Community School District / 4,464 |
| 253. | 13.8% | Okoboji Community School District / 6,337 |
| 254. | 13.8% | Dunkerton Community School District / 2,285 |
| 255. | 13.8% | Perry Community School District / 9,525 |
| 256. | 13.8% | Le Mars Community School District / 13,292 |
| 257. | 13.8% | Webster City Community School District / 9,969 |
| 258. | 13.8% | Humboldt Community School District / 7,490 |
| 259. | 13.7% | Clarion-Goldfield Community School District / 4,898 |
| 260. | 13.7% | GMG Community School District / 1,929 |
| 261. | 13.7% | BCLUW Community School District / 3,495 |
| 262. | 13.6% | North Tama County Community School District / 3,006 |
| 263. | 13.6% | Lenox Community School District / 1,919 |
| 264. | 13.6% | Denver Community School District / 3,669 |
| 265. | 13.6% | Glenwood Community School District / 11,050 |
| 266. | 13.5% | Odebolt-Arthur Community School District / 2,237 |
| 267. | 13.5% | Name N/A / 1,421 |
| 268. | 13.5% | Tripoli Community School District / 2,611 |
| 268. | 13.5% | Walnut Community School District / 1,280 |
| 270. | 13.4% | Collins-Maxwell Community School District / 2,624 |
| 271. | 13.2% | Wall Lake View Auburn Community School District / 5,840 |
| 272. | 13.2% | A-H-S-T Community School District / 3,050 |
| 273. | 13.1% | Starmont Community School District / 4,089 |
| 273. | 13.1% | Harmony Community School District / 2,668 |
| 273. | 13.1% | East Central Community School District / 2,115 |
| 276. | 13.0% | St. Ansgar Community School District / 4,057 |
| 277. | 13.0% | Central Lee Community School District / 5,597 |
| 277. | 13.0% | Northeast Community School District / 2,976 |
| 279. | 13.0% | Clear Lake Community School District / 8,664 |
| 280. | 12.9% | Eddyville-Blakesburg Community School District / 3,871 |
| 281. | 12.8% | Ventura Community School District / 1,727 |
| 282. | 12.8% | Durant Community School District / 3,289 |
| 283. | 12.6% | IKM Community School District / 4,746 |
| 284. | 12.6% | Elk Horn-Kimballton Community School District / 1,526 |
| 284. | 12.6% | Armstrong-Ringsted Community School District / 2,238 |
| 286. | 12.5% | Garner-Hayfield Community School District / 3,825 |
| 287. | 12.5% | Fairfield Community School District / 15,380 |
| 288. | 12.5% | Colo-Nesco Community School District / 3,186 |
| 288. | 12.5% | Edgewood-Colesburg Community School District / 2,993 |
| 290. | 12.4% | Riverside Community School District / 3,751 |
| 291. | 12.4% | Roland-Story Community School District / 5,841 |
| 292. | 12.3% | Dows Community School District / 926 |
| 293. | 12.3% | Lone Tree Community School District / 2,972 |
| 294. | 12.3% | Aurelia Community School District / 1,691 |
| 295. | 12.2% | Schleswig Community School District / 1,649 |
| 295. | 12.2% | Clayton Ridge Community School District / 4,952 |
| 297. | 12.2% | Baxter Community School District / 1,895 |
| 298. | 11.9% | Nashua-Plainfield Community School District / 4,098 |
| 298. | 11.9% | Davis County Community School District / 8,532 |
| 300. | 11.9% | Charles City Community School District / 11,307 |
| 301. | 11.9% | Name N/A / 1,588 |
| 302. | 11.8% | Melcher-Dallas Community School District / 2,120 |
| 303. | 11.6% | Coon Rapids-Bayard Community School District / 2,810 |
| 304. | 11.5% | South Hamilton Community School District / 3,759 |
| 304. | 11.5% | Stratford Community School District / 1,221 |
| 304. | 11.5% | Sentral Community School District / 1,138 |
| 307. | 11.4% | South Winneshiek Community School District / 4,437 |
| 308. | 11.3% | Belmond-Klemme Community School District / 4,289 |
| 309. | 11.2% | Gilbert Community School District / 6,573 |
| 310. | 11.1% | Remsen-Union Community School District / 3,069 |
| 311. | 11.1% | South Tama County Community School District / 8,893 |
| 312. | 11.0% | Aplington-Parkersburg Community School District / 4,144 |
| 312. | 11.0% | Lake Mills Community School District / 3,806 |
| 314. | 11.0% | Sumner Community School District / 3,342 |
| 315. | 10.6% | South O'Brien Community School District / 4,843 |
| 316. | 10.5% | Cal Community School District / 1,833 |
| 317. | 10.4% | Allison-Bristow Community School District / 3,963 |
| 318. | 10.3% | West Lyon Community School District / 4,649 |
| 319. | 10.2% | Audubon Community School District / 3,482 |
| 320. | 10.1% | West Sioux Community School District / 4,130 |
| 321. | 9.9% | AGWSR Community School District / 4,803 |
| 322. | 9.8% | Schaller-Crestland Community School District / 2,241 |
| 323. | 9.8% | Morning Sun Community School District / 1,475 |
| 324. | 9.6% | Sheldon Community School District / 7,300 |
| 325. | 9.6% | Sibley-Ocheyedan Community School District / 4,760 |
| 326. | 9.6% | West Hancock Community School District / 4,261 |
| 327. | 9.5% | Riceville Community School District / 2,813 |
| 328. | 9.5% | Denison Community School District / 10,164 |
| 329. | 9.4% | Pella Community School District / 15,525 |
| 330. | 9.4% | Corwith-Wesley Community School District / 1,055 |
| 331. | 9.2% | Turkey Valley Community School District / 3,049 |
| 332. | 9.2% | Alta Community School District / 2,762 |
| 333. | 9.1% | Storm Lake Community School District / 12,279 |
| 334. | 9.0% | Woden-Crystal Lake Community School District / 882 |
| 335. | 8.9% | North Iowa Community School District / 3,286 |
| 336. | 8.6% | George-Little Rock Community School District / 2,578 |
| 337. | 8.2% | Hampton-Dumont Community School District / 7,027 |
| 338. | 8.1% | Columbus Community School District / 4,712 |
| 339. | 8.0% | Lynnville-Sully Community School District / 3,152 |
| 340. | 8.0% | Clarksville Community School District / 2,108 |
| 341. | 7.8% | Postville Community School District / 3,748 |
| 342. | 7.7% | Mid-Prairie Community School District / 8,815 |
| 343. | 7.6% | Pomeroy-Palmer Community School District / 1,575 |
| 344. | 7.6% | Hartley-Melvin-Sanborn Community School District / 4,054 |
| 345. | 7.5% | Central Lyon Community School District / 4,211 |
| 346. | 6.7% | MOC-Floyd Valley Community School District / 11,292 |
| 347. | 6.6% | Titonka Consolidated School District / 888 |
| 348. | 6.5% | Sioux Center Community School District / 8,978 |
| 349. | 5.4% | Northwood-Kensett Community School District / 3,059 |
| 350. | 4.0% | Rock Valley Community School District / 4,785 |
| 351. | 1.7% | Boyden-Hull Community School District / 4,055 |
Please note that we only rank locations with 'Irish as First Ancestry Population Percentage' data. The rank above might not be a complete list. Locations without 'Irish as First Ancestry Population Percentage' data are not listed.
*ACS stands for U.S. Census American Community Survey. According to the U.S. Census, if the date is a range, you can interpret the data as an average of the period of time.
