| Rank | Irish as First Ancestry Population Percentage ▼ | School District / Population |
| 1. | 38.0% | Bolton School District / 5,023 |
| 2. | 32.5% | Norfolk School District / 1,669 |
| 3. | 32.5% | Marlborough School District / 6,287 |
| 4. | 32.1% | Sherman School District / 3,604 |
| 5. | 30.8% | Madison School District / 18,229 |
| 6. | 30.3% | Willington School District / 6,068 |
| 7. | 29.4% | Colebrook School District / 1,361 |
| 8. | 29.4% | North Branford School District / 14,331 |
| 9. | 29.2% | Kent School District / 2,981 |
| 10. | 29.0% | East Haddam School District / 9,038 |
| 10. | 29.0% | New Fairfield School District / 13,800 |
| 12. | 28.8% | Fairfield School District / 58,727 |
| 13. | 28.7% | Darien School District / 20,414 |
| 14. | 28.3% | Clinton School District / 13,316 |
| 15. | 28.0% | Milford School District / 52,753 |
| 16. | 27.9% | Ridgefield School District / 24,299 |
| 17. | 27.7% | Regional School District 17 / 14,672 |
| 18. | 27.7% | Old Saybrook School District / 10,326 |
| 19. | 27.7% | Regional High School District 08 / 19,104 |
| 20. | 27.6% | Granby School District / 11,124 |
| 21. | 27.5% | Simsbury School District / 23,477 |
| 22. | 27.5% | Bethany School District / 5,467 |
| 23. | 27.4% | Regional School District 12 / 7,569 |
| 24. | 27.4% | Guilford School District / 22,222 |
| 25. | 27.1% | Somers School District / 11,378 |
| 26. | 26.9% | Wilton School District / 17,874 |
| 27. | 26.7% | Hebron School District / 9,571 |
| 28. | 26.7% | Essex School District / 6,686 |
| 29. | 26.6% | Regional High School District 07 / 13,679 |
| 30. | 26.4% | Coventry School District / 12,354 |
| 31. | 26.4% | New Canaan School District / 19,564 |
| 32. | 26.3% | New Hartford School District / 6,868 |
| 33. | 26.1% | Thomaston School District / 7,873 |
| 34. | 26.1% | Regional School District 16 / 15,191 |
| 35. | 25.9% | Portland School District / 9,422 |
| 36. | 25.9% | New Milford School District / 28,159 |
| 37. | 25.8% | Windsor Locks School District / 12,419 |
| 38. | 25.8% | Union School District / 865 |
| 39. | 25.7% | Tolland School District / 14,809 |
| 40. | 25.7% | Easton School District / 7,403 |
| 41. | 25.7% | East Hampton School District / 12,891 |
| 42. | 25.6% | Cheshire School District / 29,183 |
| 43. | 25.4% | Plymouth School District / 12,213 |
| 44. | 25.3% | Suffield School District / 15,357 |
| 45. | 25.2% | Bozrah School District / 2,590 |
| 46. | 25.2% | Enfield School District / 44,794 |
| 47. | 25.1% | Scotland School District / 1,771 |
| 48. | 25.1% | Voluntown School District / 2,603 |
| 48. | 25.1% | North Canaan School District / 3,354 |
| 50. | 25.0% | Branford School District / 28,194 |
| 51. | 24.9% | Sprague School District / 2,990 |
| 52. | 24.8% | Bethel School District / 18,377 |
| 53. | 24.7% | Regional School District 15 / 27,080 |
| 54. | 24.6% | Sterling School District / 3,727 |
| 55. | 24.5% | Stafford School District / 12,046 |
| 56. | 24.4% | Wallingford School District / 44,786 |
| 57. | 24.4% | Newtown School District / 26,957 |
| 58. | 24.3% | Regional High School District 01 / 15,732 |
| 59. | 24.3% | Regional High School District 11 / 5,997 |
| 60. | 24.2% | Regional School District 18 / 9,912 |
| 61. | 24.2% | Chaplin School District / 2,362 |
| 62. | 24.1% | Westbrook School District / 6,860 |
| 63. | 24.1% | Lebanon School District / 7,253 |
| 63. | 24.1% | Glastonbury School District / 33,984 |
| 65. | 24.1% | Colchester School District / 15,849 |
| 66. | 24.0% | Regional School District 14 / 13,504 |
| 67. | 23.9% | Monroe School District / 19,316 |
| 68. | 23.8% | Trumbull School District / 35,495 |
| 69. | 23.8% | Ellington School District / 15,228 |
| 70. | 23.7% | Sharon School District / 2,837 |
| 71. | 23.7% | Regional School District 13 / 11,706 |
| 72. | 23.6% | Preston School District / 4,721 |
| 72. | 23.6% | Wethersfield School District / 26,613 |
| 74. | 23.6% | Regional High School District 04 / 15,306 |
| 75. | 23.6% | Hampton School District / 1,864 |
| 76. | 23.4% | Barkhamsted School District / 3,781 |
| 77. | 23.4% | Regional School District 10 / 14,721 |
| 78. | 23.4% | Canaan School District / 1,161 |
| 79. | 23.4% | Stonington School District / 18,497 |
| 80. | 23.3% | Chester School District / 3,976 |
| 81. | 23.2% | Name N/A / 216,484 |
| 82. | 23.2% | Watertown School District / 22,522 |
| 83. | 23.2% | Litchfield School District / 8,512 |
| 84. | 23.1% | Pomfret School District / 4,197 |
| 85. | 23.0% | Avon School District / 17,678 |
| 86. | 23.0% | Columbia School District / 5,425 |
| 87. | 23.0% | Regional High School District 09 / 16,348 |
| 88. | 22.8% | Oxford School District / 12,192 |
| 89. | 22.6% | Cornwall School District / 1,589 |
| 90. | 22.6% | Brookfield School District / 16,214 |
| 91. | 22.6% | East Lyme School District / 19,067 |
| 92. | 22.6% | Woodstock School District / 7,892 |
| 93. | 22.3% | Regional School District 06 / 6,891 |
| 94. | 22.2% | Putnam School District / 9,564 |
| 95. | 22.1% | Montville School District / 19,469 |
| 96. | 22.1% | Plainfield School District / 15,384 |
| 97. | 22.0% | Wolcott School District / 16,446 |
| 98. | 21.9% | Hartland School District / 2,009 |
| 99. | 21.9% | Orange School District / 13,831 |
| 100. | 21.9% | Regional High School District 19 / 36,243 |
| 101. | 21.6% | Winchester School District / 11,221 |
| 102. | 21.4% | Waterford School District / 19,430 |
| 102. | 21.4% | Salisbury School District / 3,810 |
| 104. | 21.4% | Thompson School District / 9,434 |
| 105. | 21.3% | Canton School District / 10,037 |
| 106. | 21.2% | Andover School District / 3,246 |
| 106. | 21.2% | Regional High School District 05 / 28,305 |
| 108. | 21.2% | Eastford School District / 1,626 |
| 109. | 21.2% | North Stonington School District / 5,252 |
| 110. | 21.0% | Ledyard School District / 15,023 |
| 111. | 20.8% | Seymour School District / 16,367 |
| 112. | 20.8% | Redding School District / 8,945 |
| 112. | 20.8% | Groton School District / 40,254 |
| 114. | 20.7% | Naugatuck School District / 31,746 |
| 115. | 20.7% | Killingly School District / 17,347 |
| 116. | 20.4% | South Windsor School District / 25,476 |
| 117. | 20.2% | East Granby School District / 5,161 |
| 118. | 20.2% | Ashford School District / 4,320 |
| 119. | 20.1% | Berlin School District / 19,591 |
| 120. | 20.0% | Mansfield School District / 25,855 |
| 121. | 20.0% | Southington School District / 42,491 |
| 122. | 19.8% | Vernon School District / 29,205 |
| 123. | 19.8% | West Hartford School District / 62,898 |
| 124. | 19.8% | North Haven School District / 23,927 |
| 125. | 19.8% | Farmington School District / 25,067 |
| 126. | 19.7% | East Haven School District / 29,074 |
| 127. | 19.5% | Canterbury School District / 5,091 |
| 128. | 19.5% | Deep River School District / 4,644 |
| 128. | 19.5% | Hamden School District / 60,293 |
| 130. | 19.2% | Shelton School District / 39,061 |
| 131. | 19.2% | Lisbon School District / 4,306 |
| 132. | 19.1% | Manchester School District / 57,650 |
| 133. | 19.0% | Torrington School District / 36,423 |
| 134. | 19.0% | Brooklyn School District / 8,093 |
| 135. | 19.0% | Cromwell School District / 13,888 |
| 136. | 19.0% | Weston School District / 10,088 |
| 137. | 19.0% | Bristol School District / 60,466 |
| 137. | 19.0% | East Windsor School District / 10,921 |
| 139. | 18.9% | Salem School District / 4,107 |
| 140. | 18.6% | West Haven School District / 55,070 |
| 141. | 18.1% | Griswold School District / 11,774 |
| 142. | 18.0% | Greenwich School District / 60,809 |
| 143. | 17.9% | Newington School District / 30,361 |
| 144. | 17.9% | Franklin School District / 1,924 |
| 145. | 17.6% | Westport School District / 26,109 |
| 146. | 17.2% | Stratford School District / 50,821 |
| 147. | 17.0% | Plainville School District / 17,625 |
| 148. | 16.4% | Windham School District / 25,036 |
| 149. | 16.4% | Norwich School District / 39,843 |
| 150. | 16.3% | Middletown School District / 47,349 |
| 151. | 16.2% | Woodbridge School District / 9,007 |
| 152. | 15.9% | Meriden School District / 60,484 |
| 153. | 15.7% | Derby School District / 12,826 |
| 154. | 15.5% | Rocky Hill School District / 19,418 |
| 155. | 15.0% | Danbury School District / 79,371 |
| 156. | 15.0% | Ansonia School District / 19,163 |
| 157. | 14.6% | Norwalk School District / 84,611 |
| 158. | 13.7% | New London School District / 27,496 |
| 159. | 13.4% | Windsor School District / 28,947 |
| 160. | 12.7% | Waterbury School District / 109,941 |
| 161. | 11.3% | East Hartford School District / 50,974 |
| 162. | 10.6% | Stamford School District / 120,907 |
| 163. | 9.1% | New Britain School District / 72,954 |
| 164. | 7.7% | Bloomfield School District / 20,334 |
| 165. | 7.5% | New Haven School District / 128,885 |
| 166. | 5.5% | Bridgeport School District / 142,576 |
| 167. | 3.8% | Hartford School District / 124,760 |
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.
