| Rank | Welsh as First Ancestry Population Percentage ▼ | School District / Population |
| 1. | 3.4% | Edgemont School District 23-1 / 1,082 |
| 2. | 2.0% | Lead-Deadwood School District 40-1 / 6,664 |
| 3. | 1.8% | Canistota School District 43-1 / 1,126 |
| 4. | 1.8% | Bridgewater School District 43-6 / 975 |
| 5. | 1.7% | Name N/A / 248 |
| 6. | 1.7% | Ipswich School District 22-6 / 2,238 |
| 7. | 1.6% | Langford School District 45-2 / 1,325 |
| 8. | 1.6% | Chester School District 39-1 / 1,743 |
| 9. | 1.5% | Howard School District 48-3 / 2,214 |
| 10. | 1.5% | Custer School District 16-1 / 7,499 |
| 11. | 1.5% | Haakon School District 27-1 / 1,624 |
| 12. | 1.4% | Armour School District 21-1 / 931 |
| 12. | 1.4% | Jones County School District 37-3 / 1,053 |
| 14. | 1.2% | Deuel School District 19-4 / 3,091 |
| 15. | 1.2% | Kadoka School District 35-2 / 2,941 |
| 16. | 1.1% | West Central School District 49-7 / 5,388 |
| 17. | 1.1% | Northwestern Area School District 56-7 / 1,569 |
| 18. | 1.0% | Brandon Valley School District 49-2 / 14,324 |
| 19. | 1.0% | Spearfish School District 40-2 / 14,927 |
| 19. | 1.0% | Redfield School District 56-4 / 3,552 |
| 21. | 1.0% | Oelrichs School District 23-3 / 347 |
| 22. | 1.0% | Hill City School District 51-2 / 3,230 |
| 23. | 1.0% | Name N/A / 2,842 |
| 24. | 0.9% | Britton-Hecla School District 45-4 / 3,096 |
| 25. | 0.9% | Groton Area School District 06-6 / 3,840 |
| 26. | 0.9% | Huron School District 02-2 / 13,649 |
| 27. | 0.8% | Hurley School District 60-2 / 840 |
| 28. | 0.8% | Hanson School District 30-1 / 1,887 |
| 29. | 0.8% | Rapid City School District 51-4 / 86,808 |
| 29. | 0.8% | Sioux Valley School District 05-5 / 3,296 |
| 31. | 0.7% | Brookings School District 05-1 / 23,113 |
| 32. | 0.7% | Name N/A / 462 |
| 32. | 0.7% | Aberdeen School District 06-1 / 29,441 |
| 34. | 0.7% | Greater Hoyt School District 61-4 / 304 |
| 34. | 0.7% | Canton School District 41-1 / 6,718 |
| 36. | 0.7% | Meade School District 46-1 / 17,737 |
| 37. | 0.7% | Clark School District 12-2 / 2,327 |
| 38. | 0.6% | Doland School District 56-2 / 965 |
| 39. | 0.6% | Wolsey-Wessington School District 02-6 / 1,155 |
| 40. | 0.6% | De Smet School District 38-2 / 1,762 |
| 40. | 0.6% | Watertown School District 14-4 / 23,847 |
| 42. | 0.6% | Arlington School District 38-1 / 1,776 |
| 43. | 0.6% | Platte-Geddes School District 11-5 / 3,159 |
| 44. | 0.6% | Iroquois School District 02-3 / 1,115 |
| 45. | 0.6% | Vermillion School District 13-1 / 11,829 |
| 45. | 0.6% | Douglas School District 51-1 / 10,803 |
| 47. | 0.6% | Wessington Springs School District 36-2 / 1,873 |
| 47. | 0.6% | Roslyn School District 18-2 / 736 |
| 47. | 0.6% | Stanley County School District 57-1 / 2,775 |
| 50. | 0.6% | Marion School District 60-3 / 1,581 |
| 51. | 0.5% | Name N/A / 3,522 |
| 52. | 0.5% | Frederick Area School District 06-2 / 1,005 |
| 52. | 0.5% | Elk Point-Jefferson School District 61-7 / 4,009 |
| 54. | 0.5% | Madison Central School District 39-2 / 8,824 |
| 55. | 0.5% | Rutland School District 39-4 / 701 |
| 56. | 0.5% | Hamlin School District 28-3 / 3,230 |
| 57. | 0.5% | Mitchell School District 17-2 / 17,608 |
| 57. | 0.5% | Centerville School District 60-1 / 1,803 |
| 59. | 0.5% | South Central School District 26-5 / 941 |
| 60. | 0.4% | Belle Fourche School District 09-1 / 6,846 |
| 61. | 0.4% | Pierre School District 32-2 / 15,784 |
| 61. | 0.4% | Faulkton School District 24-4 / 2,010 |
| 61. | 0.4% | Leola School District 44-2 / 1,157 |
| 64. | 0.4% | Faith School District 46-2 / 652 |
| 65. | 0.4% | Wilmot School District 54-7 / 1,846 |
| 65. | 0.4% | Sioux Falls School District 49-5 / 147,374 |
| 67. | 0.3% | Lennox School District 41-4 / 7,284 |
| 67. | 0.3% | Agar-Blunt-Onida School District 58-3 / 1,995 |
| 69. | 0.3% | Gettysburg School District 53-1 / 1,354 |
| 70. | 0.3% | Bison School District 52-1 / 1,038 |
| 70. | 0.3% | Hot Springs School District 23-2 / 6,116 |
| 72. | 0.3% | Yankton School District 63-3 / 19,111 |
| 72. | 0.3% | Newell School District 09-2 / 2,696 |
| 74. | 0.3% | Parker School District 60-4 / 1,897 |
| 74. | 0.3% | Sanborn Central School District 55-5 / 1,210 |
| 74. | 0.3% | Lyman School District 42-1 / 3,138 |
| 77. | 0.3% | Willow Lake School District 12-3 / 1,180 |
| 77. | 0.3% | Harrisburg School District 41-2 / 11,628 |
| 77. | 0.3% | Chamberlain School District 07-1 / 6,258 |
| 77. | 0.3% | New Underwood School District 51-3 / 1,394 |
| 81. | 0.3% | Plankinton School District 01-1 / 1,305 |
| 82. | 0.3% | McCook Central School District 43-7 / 2,153 |
| 82. | 0.3% | McLaughlin School District 15-2 / 2,430 |
| 82. | 0.3% | Woonsocket School District 55-4 / 1,361 |
| 82. | 0.3% | Gayville-Volin School District 63-1 / 1,262 |
| 82. | 0.3% | Baltic School District 49-1 / 1,776 |
| 87. | 0.2% | Kimball School District 07-2 / 1,343 |
| 87. | 0.2% | Tripp-Delmont School District 33-5 / 1,782 |
| 89. | 0.2% | Eureka School District 44-1 / 1,404 |
| 90. | 0.2% | Dakota Valley School District 61-8 / 5,839 |
| 91. | 0.2% | Tri-Valley School District 49-6 / 4,217 |
| 92. | 0.2% | Lake Preston School District 38-3 / 1,239 |
| 93. | 0.2% | Wall School District 51-5 / 1,810 |
| 93. | 0.2% | Selby School District 62-5 / 1,842 |
| 95. | 0.2% | Tea Area School District 41-5 / 6,587 |
| 95. | 0.2% | Irene-Wakonda School District 13-3 / 2,206 |
| 97. | 0.1% | Flandreau School District 50-3 / 3,862 |
| 98. | 0.1% | Beresford School District 61-2 / 3,234 |
| 99. | 0.1% | Webster School District 18-4 / 2,702 |
| 100. | 0.1% | Sisseton School District 54-2 / 7,463 |
| 101. | 0.1% | Name N/A / 1,453 |
| 101. | 0.1% | Lemmon School District 52-4 / 1,654 |
| 101. | 0.1% | Milbank School District 25-4 / 5,205 |
| 104. | 0.1% | Deubrook School District 05-6 / 1,842 |
| 105. | 0.1% | Alcester-Hudson School District 61-1 / 2,345 |
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.
*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.
