| Rank | Median Age ▲ | School District / Population |
| 1. | 22.70 | Shannon County School District 65-1 / 13,437 |
| 2. | 23.40 | Todd County School District 66-1 / 9,575 |
| 3. | 23.70 | Vermillion School District 13-1 / 12,172 |
| 4. | 24.30 | Brookings School District 05-1 / 25,169 |
| 5. | 25.10 | Eagle Butte School District 20-1 / 4,231 |
| 6. | 25.90 | Smee School District 15-3 / 353 |
| 7. | 26.60 | Douglas School District 51-1 / 11,883 |
| 8. | 27.40 | McLaughlin School District 15-2 / 2,541 |
| 9. | 28.80 | Tea Area School District 41-5 / 4,985 |
| 10. | 28.90 | Dupree School District 64-2 / 1,980 |
| 11. | 29.80 | White River School District 47-1 / 1,644 |
| 12. | 30.80 | Harrisburg School District 41-2 / 14,083 |
| 13. | 32.00 | Bennett County School District 03-1 / 3,441 |
| 14. | 32.10 | Lyman School District 42-1 / 3,056 |
| 15. | 32.40 | Elkton School District 05-3 / 1,359 |
| 16. | 32.60 | Chamberlain School District 07-1 / 6,192 |
| 17. | 33.10 | Emery School District 30-2 / 952 |
| 18. | 33.20 | Kadoka School District 35-2 / 3,257 |
| 19. | 33.30 | Florence School District 14-1 / 1,040 |
| 20. | 33.50 | Tri-Valley School District 49-6 / 4,690 |
| 21. | 33.60 | Montrose School District 43-2 / 1,202 |
| 22. | 33.90 | Sisseton School District 54-2 / 7,692 |
| 23. | 34.00 | Sioux Falls School District 49-5 / 140,350 |
| 24. | 34.40 | Brandon Valley School District 49-2 / 15,229 |
| 25. | 34.80 | Castlewood School District 28-1 / 1,215 |
| 26. | 35.30 | Colman-Egan School District 50-5 / 2,106 |
| 26. | 35.30 | Gayville-Volin School District 63-1 / 1,164 |
| 28. | 35.40 | McIntosh School District 15-1 / 941 |
| 29. | 35.50 | Leola School District 44-2 / 1,062 |
| 30. | 35.70 | Summit School District 54-6 / 610 |
| 30. | 35.70 | Andes Central School District 11-1 / 1,855 |
| 32. | 35.90 | Greater Hoyt School District 61-4 / 261 |
| 33. | 36.00 | West Central School District 49-7 / 6,109 |
| 33. | 36.00 | Hamlin School District 28-3 / 3,274 |
| 35. | 36.20 | Madison Central School District 39-2 / 8,557 |
| 36. | 36.70 | Dakota Valley School District 61-8 / 5,854 |
| 37. | 36.80 | Deubrook School District 05-6 / 1,925 |
| 37. | 36.80 | Rapid City School District 51-4 / 88,085 |
| 39. | 37.00 | Warner School District 06-5 / 946 |
| 40. | 37.40 | Spearfish School District 40-2 / 14,780 |
| 40. | 37.40 | Estelline School District 28-2 / 1,963 |
| 42. | 37.60 | Oelrichs School District 23-3 / 466 |
| 43. | 37.90 | Garretson School District 49-4 / 2,723 |
| 43. | 37.90 | Timber Lake School District 20-3 / 1,881 |
| 45. | 38.10 | Colome Consolidated School District 59-3 / 1,652 |
| 45. | 38.10 | Watertown School District 14-4 / 24,445 |
| 45. | 38.10 | Aberdeen School District 06-1 / 30,413 |
| 45. | 38.10 | Wagner School District 11-4 / 3,891 |
| 49. | 38.20 | Mitchell School District 17-2 / 18,036 |
| 50. | 38.30 | Iroquois School District 02-3 / 1,162 |
| 50. | 38.30 | Sioux Valley School District 05-5 / 3,183 |
| 50. | 38.30 | Waverly School District 14-5 / 1,108 |
| 53. | 38.40 | Grant-Deuel School District 25-3 / 1,059 |
| 54. | 38.80 | Wall School District 51-5 / 1,788 |
| 54. | 38.80 | Plankinton School District 01-1 / 1,276 |
| 54. | 38.80 | Baltic School District 49-1 / 1,884 |
| 57. | 38.90 | Pierre School District 32-2 / 15,635 |
| 58. | 39.00 | Lennox School District 41-4 / 5,734 |
| 58. | 39.00 | Mount Vernon School District 17-3 / 996 |
| 60. | 39.30 | Beresford School District 61-2 / 3,392 |
| 61. | 39.50 | Woonsocket School District 55-4 / 1,366 |
| 62. | 39.70 | Hanson School District 30-1 / 1,733 |
| 63. | 39.90 | Elk Mountain School District 16-2 / 356 |
| 64. | 40.10 | Waubay School District 18-3 / 1,293 |
| 65. | 40.30 | Bison School District 52-1 / 970 |
| 65. | 40.30 | Flandreau School District 50-3 / 3,568 |
| 65. | 40.30 | Newell School District 09-2 / 2,537 |
| 65. | 40.30 | Rutland School District 39-4 / 639 |
| 69. | 40.50 | Ethan School District 17-1 / 891 |
| 69. | 40.50 | Elk Point-Jefferson School District 61-7 / 3,886 |
| 71. | 40.60 | Faith School District 46-2 / 689 |
| 72. | 40.70 | Huron School District 02-2 / 14,661 |
| 73. | 40.80 | Belle Fourche School District 09-1 / 7,490 |
| 74. | 41.00 | Stanley County School District 57-1 / 2,896 |
| 74. | 41.00 | Redfield School District 56-4 / 3,664 |
| 76. | 41.30 | Yankton School District 63-3 / 19,611 |
| 76. | 41.30 | Parkston School District 33-3 / 2,989 |
| 78. | 41.80 | Jones County School District 37-3 / 1,064 |
| 79. | 42.10 | Meade School District 46-1 / 18,163 |
| 79. | 42.10 | Bon Homme School District 04-2 / 4,770 |
| 81. | 42.30 | Chester School District 39-1 / 1,590 |
| 81. | 42.30 | Sanborn Central School District 55-5 / 1,185 |
| 83. | 42.40 | Canton School District 41-1 / 5,377 |
| 84. | 42.60 | Lead-Deadwood School District 40-1 / 7,071 |
| 84. | 42.60 | Parker School District 60-4 / 2,062 |
| 86. | 42.80 | Groton Area School District 06-6 / 3,876 |
| 86. | 42.80 | White Lake School District 01-3 / 827 |
| 86. | 42.80 | Bridgewater School District 43-6 / 961 |
| 89. | 43.10 | Centerville School District 60-1 / 1,716 |
| 90. | 43.20 | Irene-Wakonda School District 13-3 / 2,353 |
| 90. | 43.20 | Avon School District 04-1 / 1,399 |
| 92. | 43.80 | McCook Central School District 43-7 / 2,279 |
| 93. | 43.90 | Henry School District 14-2 / 544 |
| 94. | 44.00 | Selby School District 62-5 / 1,858 |
| 95. | 44.10 | Agar-Blunt-Onida School District 58-3 / 2,079 |
| 95. | 44.10 | Faulkton School District 24-4 / 2,178 |
| 97. | 44.30 | Burke School District 26-2 / 1,329 |
| 98. | 44.40 | Dell Rapids School District 49-3 / 5,050 |
| 99. | 44.80 | Hitchcock-Tulare School District 56-6 / 1,283 |
| 99. | 44.80 | Clark School District 12-2 / 2,706 |
| 101. | 44.90 | South Central School District 26-5 / 899 |
| 102. | 45.10 | Milbank School District 25-4 / 5,391 |
| 103. | 45.20 | Willow Lake School District 12-3 / 958 |
| 103. | 45.20 | Winner School District 59-2 / 4,467 |
| 105. | 45.50 | Platte-Geddes School District 11-5 / 3,029 |
| 106. | 45.60 | Freeman School District 33-1 / 2,564 |
| 106. | 45.60 | Frederick Area School District 06-2 / 958 |
| 106. | 45.60 | Hurley School District 60-2 / 800 |
| 109. | 45.90 | Highmore-Harrold School District 34-2 / 1,950 |
| 109. | 45.90 | Viborg School District 60-5 / 1,453 |
| 111. | 46.00 | Harding County School District 31-1 / 1,250 |
| 111. | 46.00 | Canistota School District 43-1 / 1,045 |
| 113. | 46.10 | Rosholt School District 54-4 / 925 |
| 113. | 46.10 | Big Stone City School District 25-1 / 725 |
| 115. | 46.20 | Bowdle School District 22-1 / 823 |
| 116. | 46.30 | Tripp-Delmont School District 33-5 / 1,801 |
| 117. | 46.50 | Alcester-Hudson School District 61-1 / 2,242 |
| 117. | 46.50 | Deuel School District 19-4 / 3,139 |
| 117. | 46.50 | Ipswich School District 22-6 / 2,265 |
| 120. | 46.80 | Edmunds Central School District 22-5 / 1,150 |
| 121. | 46.90 | Menno School District 33-2 / 1,557 |
| 121. | 46.90 | Webster School District 18-4 / 2,744 |
| 121. | 46.90 | Lake Preston School District 38-3 / 1,165 |
| 124. | 47.00 | Arlington School District 38-1 / 1,851 |
| 125. | 47.10 | Britton-Hecla School District 45-4 / 3,142 |
| 126. | 47.30 | Stickney School District 01-2 / 576 |
| 127. | 47.50 | Northwestern Area School District 56-7 / 1,855 |
| 128. | 47.70 | Wolsey-Wessington School District 02-6 / 1,225 |
| 128. | 47.70 | Scotland School District 04-3 / 1,742 |
| 130. | 47.80 | Oldham-Ramona School District 39-5 / 847 |
| 131. | 48.10 | Armour School District 21-1 / 1,002 |
| 132. | 48.20 | Doland School District 56-2 / 909 |
| 133. | 48.40 | New Underwood School District 51-3 / 1,453 |
| 134. | 48.50 | Mobridge-Pollock School District 62-6 / 4,046 |
| 135. | 48.90 | Howard School District 48-3 / 2,350 |
| 136. | 49.10 | Miller Area School District 29-4 / 2,958 |
| 137. | 49.30 | Hoven School District 53-2 / 1,099 |
| 138. | 49.40 | Langford School District 45-2 / 1,325 |
| 138. | 49.40 | Corsica School District 21-2 / 1,240 |
| 138. | 49.40 | Haakon School District 27-1 / 1,632 |
| 138. | 49.40 | De Smet School District 38-2 / 1,730 |
| 142. | 49.80 | Wilmot School District 54-7 / 1,951 |
| 143. | 49.90 | Custer School District 16-1 / 7,774 |
| 144. | 50.10 | Edgemont School District 23-1 / 1,182 |
| 145. | 50.30 | Kimball School District 07-2 / 1,251 |
| 145. | 50.30 | Gettysburg School District 53-1 / 1,412 |
| 147. | 50.60 | Gregory School District 26-4 / 2,123 |
| 148. | 50.70 | Hot Springs School District 23-2 / 5,683 |
| 148. | 50.70 | Lemmon School District 52-4 / 2,020 |
| 150. | 52.90 | Herreid School District 10-1 / 540 |
| 150. | 52.90 | Hill City School District 51-2 / 2,630 |
| 152. | 53.70 | Eureka School District 44-1 / 1,543 |
| 152. | 53.70 | Marion School District 60-3 / 1,455 |
| 154. | 54.10 | Wessington Springs School District 36-2 / 1,851 |
| 155. | 58.10 | Roslyn School District 18-2 / 748 |
| 156. | 62.40 | Greater Scott School District 61-5 / 114 |
Please note that we only rank locations with 'Median Age' data. The rank above might not be a complete list. Locations without 'Median Age' 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.
