| Rank | Welsh as First Ancestry Population Percentage ▼ | School District / Population |
| 1. | 3.9% | Oelrichs School District 23-3 / 363 |
| 2. | 3.4% | West Central School District 49-7 / 6,415 |
| 3. | 3.0% | Elk Mountain School District 16-2 / 259 |
| 4. | 2.9% | Gayville-Volin School District 63-1 / 881 |
| 5. | 2.2% | Canistota School District 43-1 / 1,047 |
| 6. | 2.2% | Hot Springs School District 23-2 / 5,738 |
| 7. | 2.1% | Colman-Egan School District 50-5 / 1,914 |
| 8. | 2.0% | Lead-Deadwood School District 40-1 / 6,876 |
| 9. | 1.9% | Dakota Valley School District 61-8 / 6,327 |
| 10. | 1.9% | Iroquois School District 02-3 / 1,118 |
| 11. | 1.7% | Mitchell School District 17-2 / 18,378 |
| 12. | 1.7% | Madison Central School District 39-2 / 9,408 |
| 13. | 1.6% | Ipswich School District 22-6 / 2,345 |
| 14. | 1.5% | Rutland School District 39-4 / 534 |
| 15. | 1.3% | Grant-Deuel School District 25-3 / 929 |
| 16. | 1.3% | Elkton School District 05-3 / 1,293 |
| 17. | 1.3% | Leola School District 44-2 / 1,194 |
| 18. | 1.2% | Tri-Valley School District 49-6 / 5,587 |
| 19. | 1.2% | Meade School District 46-1 / 18,255 |
| 20. | 1.2% | Harding County School District 31-1 / 1,263 |
| 21. | 1.1% | Sanborn Central School District 55-5 / 1,233 |
| 22. | 1.1% | Douglas School District 51-1 / 11,934 |
| 23. | 1.0% | Huron School District 02-2 / 15,635 |
| 24. | 1.0% | Spearfish School District 40-2 / 15,757 |
| 25. | 1.0% | Marion School District 60-3 / 1,401 |
| 26. | 0.9% | Rapid City School District 51-4 / 95,347 |
| 27. | 0.9% | Hill City School District 51-2 / 3,146 |
| 28. | 0.9% | Chamberlain School District 07-1 / 6,452 |
| 28. | 0.9% | Corsica School District 21-2 / 1,252 |
| 30. | 0.8% | Langford School District 45-2 / 1,523 |
| 31. | 0.8% | Wessington Springs School District 36-2 / 1,762 |
| 32. | 0.8% | Platte-Geddes School District 11-5 / 3,112 |
| 33. | 0.8% | Pierre School District 32-2 / 16,279 |
| 34. | 0.8% | Vermillion School District 13-1 / 12,343 |
| 35. | 0.8% | Clark School District 12-2 / 2,354 |
| 36. | 0.8% | Henry School District 14-2 / 609 |
| 37. | 0.7% | Gettysburg School District 53-1 / 1,434 |
| 38. | 0.7% | Colome Consolidated School District 59-3 / 1,229 |
| 39. | 0.7% | Viborg School District 60-5 / 2,349 |
| 39. | 0.7% | White River School District 47-1 / 1,805 |
| 41. | 0.7% | Britton-Hecla School District 45-4 / 2,883 |
| 41. | 0.7% | Chester School District 39-1 / 1,713 |
| 43. | 0.6% | South Central School District 26-5 / 907 |
| 44. | 0.6% | Gregory School District 26-4 / 2,148 |
| 45. | 0.6% | Yankton School District 63-3 / 20,147 |
| 46. | 0.5% | Custer School District 16-1 / 8,032 |
| 46. | 0.5% | Deuel School District 19-4 / 3,256 |
| 48. | 0.5% | Haakon School District 27-1 / 1,805 |
| 49. | 0.5% | Baltic School District 49-1 / 2,035 |
| 50. | 0.5% | Wall School District 51-5 / 1,723 |
| 51. | 0.5% | Edmunds Central School District 22-5 / 1,138 |
| 52. | 0.5% | Garretson School District 49-4 / 2,633 |
| 53. | 0.5% | Redfield School District 56-4 / 3,601 |
| 53. | 0.5% | Lennox School District 41-4 / 6,080 |
| 53. | 0.5% | Sioux Falls School District 49-5 / 147,771 |
| 56. | 0.5% | Andes Central School District 11-1 / 2,104 |
| 57. | 0.4% | Flandreau School District 50-3 / 3,583 |
| 57. | 0.4% | McCook Central School District 43-7 / 2,366 |
| 59. | 0.4% | Hamlin School District 28-3 / 3,147 |
| 59. | 0.4% | Woonsocket School District 55-4 / 1,189 |
| 61. | 0.4% | Stanley County School District 57-1 / 2,984 |
| 61. | 0.4% | Wolsey-Wessington School District 02-6 / 1,523 |
| 61. | 0.4% | Lake Preston School District 38-3 / 1,217 |
| 64. | 0.4% | Brookings School District 05-1 / 25,969 |
| 64. | 0.4% | Arlington School District 38-1 / 1,833 |
| 66. | 0.4% | Hoven School District 53-2 / 981 |
| 66. | 0.4% | Groton Area School District 06-6 / 3,704 |
| 68. | 0.3% | Howard School District 48-3 / 2,314 |
| 68. | 0.3% | Willow Lake School District 12-3 / 1,248 |
| 70. | 0.3% | Selby School District 62-5 / 1,773 |
| 71. | 0.3% | Mobridge-Pollock School District 62-6 / 4,132 |
| 71. | 0.3% | Aberdeen School District 06-1 / 31,829 |
| 73. | 0.3% | New Underwood School District 51-3 / 1,208 |
| 74. | 0.3% | Hitchcock-Tulare School District 56-6 / 1,165 |
| 74. | 0.3% | Webster School District 18-4 / 3,312 |
| 76. | 0.3% | Elk Point-Jefferson School District 61-7 / 4,254 |
| 76. | 0.3% | Faith School District 46-2 / 806 |
| 76. | 0.3% | Newell School District 09-2 / 2,566 |
| 76. | 0.3% | Deubrook School District 05-6 / 1,941 |
| 80. | 0.3% | Faulkton School District 24-4 / 2,057 |
| 80. | 0.3% | Oldham-Ramona School District 39-5 / 831 |
| 82. | 0.3% | Sioux Valley School District 05-5 / 3,790 |
| 82. | 0.3% | Bison School District 52-1 / 829 |
| 82. | 0.3% | Miller Area School District 29-4 / 3,036 |
| 85. | 0.3% | Sisseton School District 54-2 / 8,009 |
| 85. | 0.3% | Canton School District 41-1 / 5,487 |
| 87. | 0.2% | Big Stone City School District 25-1 / 873 |
| 88. | 0.2% | Brandon Valley School District 49-2 / 16,837 |
| 88. | 0.2% | Mount Vernon School District 17-3 / 1,048 |
| 88. | 0.2% | Beresford School District 61-2 / 3,637 |
| 91. | 0.2% | Parker School District 60-4 / 2,082 |
| 91. | 0.2% | Doland School District 56-2 / 978 |
| 93. | 0.2% | Harrisburg School District 41-2 / 18,360 |
| 94. | 0.2% | Irene-Wakonda School District 13-3 / 2,390 |
| 95. | 0.2% | Winner School District 59-2 / 4,528 |
| 96. | 0.2% | Kadoka School District 35-2 / 3,493 |
| 96. | 0.2% | Eureka School District 44-1 / 1,279 |
| 98. | 0.2% | Dell Rapids School District 49-3 / 5,501 |
| 98. | 0.2% | Burke School District 26-2 / 1,353 |
| 98. | 0.2% | Wagner School District 11-4 / 4,078 |
| 98. | 0.2% | Lemmon School District 52-4 / 2,162 |
| 98. | 0.2% | Menno School District 33-2 / 1,320 |
| 103. | 0.2% | Centerville School District 60-1 / 1,436 |
| 104. | 0.1% | Emery School District 30-2 / 1,759 |
| 104. | 0.1% | Wilmot School District 54-7 / 1,609 |
| 104. | 0.1% | Northwestern Area School District 56-7 / 1,845 |
| 107. | 0.1% | Warner School District 06-5 / 1,122 |
| 107. | 0.1% | Frederick Area School District 06-2 / 1,092 |
| 109. | 0.1% | Watertown School District 14-4 / 25,208 |
| 110. | 0.1% | Agar-Blunt-Onida School District 58-3 / 2,065 |
| 110. | 0.1% | Eagle Butte School District 20-1 / 5,056 |
| 110. | 0.1% | Bennett County School District 03-1 / 3,440 |
| 113. | 0.1% | Dupree School District 64-2 / 1,871 |
| 113. | 0.1% | Tea Area School District 41-5 / 6,850 |
| 115. | 0.0% | Milbank School District 25-4 / 5,453 |
| 116. | 0.0% | Todd County School District 66-1 / 9,859 |
Please note that we only rank locations with 'Welsh as First Ancestry Population Percentage' data. The rank above might not be a complete list. Locations without 'Welsh as First Ancestry Population Percentage' data are not listed.
