| Rank | Average Household Size ▼ | School District / Population |
| 1. | 4.29 | Shannon County School District 65-1 / 13,586 |
| 2. | 3.92 | Smee School District 15-3 / 467 |
| 3. | 3.45 | Todd County School District 66-1 / 9,612 |
| 4. | 3.41 | McLaughlin School District 15-2 / 2,456 |
| 5. | 3.34 | Eagle Butte School District 20-1 / 4,830 |
| 6. | 3.11 | Bennett County School District 03-1 / 3,431 |
| 7. | 3.09 | Dupree School District 64-2 / 1,790 |
| 8. | 2.99 | White River School District 47-1 / 1,782 |
| 9. | 2.97 | Tea Area School District 41-5 / 5,408 |
| 10. | 2.90 | Kadoka School District 35-2 / 3,298 |
| 11. | 2.86 | Wagner School District 11-4 / 3,830 |
| 12. | 2.84 | Douglas School District 51-1 / 11,829 |
| 13. | 2.82 | Hamlin School District 28-3 / 3,314 |
| 14. | 2.81 | Lyman School District 42-1 / 2,974 |
| 14. | 2.81 | Hanson School District 30-1 / 1,854 |
| 16. | 2.79 | Brandon Valley School District 49-2 / 16,026 |
| 17. | 2.78 | West Central School District 49-7 / 6,058 |
| 18. | 2.77 | Sisseton School District 54-2 / 7,853 |
| 18. | 2.77 | Baltic School District 49-1 / 1,967 |
| 20. | 2.75 | McIntosh School District 15-1 / 851 |
| 21. | 2.74 | Warner School District 06-5 / 1,130 |
| 22. | 2.73 | Tri-Valley School District 49-6 / 5,024 |
| 22. | 2.73 | Harrisburg School District 41-2 / 15,963 |
| 24. | 2.71 | Andes Central School District 11-1 / 2,242 |
| 24. | 2.71 | Waverly School District 14-5 / 1,058 |
| 26. | 2.70 | Greater Hoyt School District 61-4 / 305 |
| 27. | 2.68 | Timber Lake School District 20-3 / 1,474 |
| 28. | 2.66 | Garretson School District 49-4 / 2,474 |
| 29. | 2.65 | Dell Rapids School District 49-3 / 5,508 |
| 29. | 2.65 | Castlewood School District 28-1 / 1,394 |
| 29. | 2.65 | Florence School District 14-1 / 836 |
| 32. | 2.64 | Mount Vernon School District 17-3 / 998 |
| 33. | 2.63 | Rutland School District 39-4 / 578 |
| 33. | 2.63 | Summit School District 54-6 / 620 |
| 35. | 2.61 | Waubay School District 18-3 / 1,359 |
| 36. | 2.60 | Lennox School District 41-4 / 5,988 |
| 37. | 2.59 | Ethan School District 17-1 / 788 |
| 37. | 2.59 | Chamberlain School District 07-1 / 6,044 |
| 39. | 2.56 | Gayville-Volin School District 63-1 / 1,030 |
| 40. | 2.55 | Elkton School District 05-3 / 1,467 |
| 40. | 2.55 | Colman-Egan School District 50-5 / 1,663 |
| 40. | 2.55 | Canton School District 41-1 / 5,582 |
| 43. | 2.54 | Henry School District 14-2 / 534 |
| 44. | 2.53 | Dakota Valley School District 61-8 / 6,278 |
| 44. | 2.53 | New Underwood School District 51-3 / 1,167 |
| 46. | 2.52 | Hitchcock-Tulare School District 56-6 / 1,335 |
| 47. | 2.51 | Elk Point-Jefferson School District 61-7 / 3,907 |
| 47. | 2.51 | Kimball School District 07-2 / 1,461 |
| 49. | 2.50 | Canistota School District 43-1 / 1,207 |
| 50. | 2.49 | Grant-Deuel School District 25-3 / 970 |
| 50. | 2.49 | Montrose School District 43-2 / 1,120 |
| 52. | 2.47 | Frederick Area School District 06-2 / 965 |
| 52. | 2.47 | Chester School District 39-1 / 1,692 |
| 52. | 2.47 | Emery School District 30-2 / 747 |
| 55. | 2.46 | Plankinton School District 01-1 / 1,281 |
| 56. | 2.45 | Corsica School District 21-2 / 1,241 |
| 56. | 2.45 | Parker School District 60-4 / 2,013 |
| 58. | 2.43 | Iroquois School District 02-3 / 1,227 |
| 58. | 2.43 | Sioux Valley School District 05-5 / 3,325 |
| 60. | 2.42 | Avon School District 04-1 / 1,158 |
| 60. | 2.42 | Beresford School District 61-2 / 3,381 |
| 60. | 2.42 | Faith School District 46-2 / 809 |
| 60. | 2.42 | Stanley County School District 57-1 / 2,966 |
| 60. | 2.42 | Deubrook School District 05-6 / 1,902 |
| 60. | 2.42 | Flandreau School District 50-3 / 3,907 |
| 66. | 2.41 | Belle Fourche School District 09-1 / 7,962 |
| 67. | 2.40 | McCook Central School District 43-7 / 2,300 |
| 67. | 2.40 | Meade School District 46-1 / 18,211 |
| 69. | 2.39 | Bridgewater School District 43-6 / 876 |
| 69. | 2.39 | Platte-Geddes School District 11-5 / 3,157 |
| 69. | 2.39 | Estelline School District 28-2 / 1,589 |
| 72. | 2.38 | Hurley School District 60-2 / 946 |
| 72. | 2.38 | Sioux Falls School District 49-5 / 143,629 |
| 74. | 2.37 | Deuel School District 19-4 / 3,327 |
| 74. | 2.37 | Rapid City School District 51-4 / 91,522 |
| 74. | 2.37 | Newell School District 09-2 / 2,206 |
| 74. | 2.37 | Alcester-Hudson School District 61-1 / 2,273 |
| 74. | 2.37 | Highmore-Harrold School District 34-2 / 1,821 |
| 79. | 2.36 | Colome Consolidated School District 59-3 / 1,212 |
| 79. | 2.36 | Parkston School District 33-3 / 2,950 |
| 79. | 2.36 | Willow Lake School District 12-3 / 1,060 |
| 82. | 2.35 | Irene-Wakonda School District 13-3 / 2,024 |
| 83. | 2.34 | Bison School District 52-1 / 912 |
| 83. | 2.34 | Centerville School District 60-1 / 1,510 |
| 83. | 2.34 | Doland School District 56-2 / 849 |
| 83. | 2.34 | Milbank School District 25-4 / 5,743 |
| 83. | 2.34 | White Lake School District 01-3 / 723 |
| 88. | 2.33 | Brookings School District 05-1 / 25,450 |
| 88. | 2.33 | Greater Scott School District 61-5 / 112 |
| 88. | 2.33 | Watertown School District 14-4 / 25,013 |
| 88. | 2.33 | Groton Area School District 06-6 / 3,587 |
| 92. | 2.31 | Northwestern Area School District 56-7 / 1,800 |
| 92. | 2.31 | Huron School District 02-2 / 15,123 |
| 94. | 2.30 | Agar-Blunt-Onida School District 58-3 / 1,915 |
| 95. | 2.29 | Marion School District 60-3 / 1,573 |
| 95. | 2.29 | Stickney School District 01-2 / 729 |
| 95. | 2.29 | Bowdle School District 22-1 / 758 |
| 95. | 2.29 | Oelrichs School District 23-3 / 355 |
| 95. | 2.29 | Wall School District 51-5 / 1,497 |
| 95. | 2.29 | Pierre School District 32-2 / 16,064 |
| 95. | 2.29 | Ipswich School District 22-6 / 2,413 |
| 102. | 2.28 | Scotland School District 04-3 / 1,870 |
| 102. | 2.28 | Leola School District 44-2 / 1,214 |
| 102. | 2.28 | Viborg School District 60-5 / 1,419 |
| 102. | 2.28 | Wolsey-Wessington School District 02-6 / 1,257 |
| 102. | 2.28 | Hill City School District 51-2 / 3,196 |
| 102. | 2.28 | Rosholt School District 54-4 / 1,028 |
| 108. | 2.27 | Wilmot School District 54-7 / 1,540 |
| 108. | 2.27 | Elk Mountain School District 16-2 / 261 |
| 108. | 2.27 | Arlington School District 38-1 / 1,915 |
| 108. | 2.27 | Yankton School District 63-3 / 20,134 |
| 108. | 2.27 | Madison Central School District 39-2 / 8,762 |
| 108. | 2.27 | Harding County School District 31-1 / 1,255 |
| 114. | 2.26 | Sanborn Central School District 55-5 / 1,215 |
| 114. | 2.26 | Winner School District 59-2 / 4,660 |
| 114. | 2.26 | Haakon School District 27-1 / 1,697 |
| 117. | 2.25 | Vermillion School District 13-1 / 12,235 |
| 118. | 2.24 | Langford School District 45-2 / 1,195 |
| 118. | 2.24 | Howard School District 48-3 / 2,375 |
| 118. | 2.24 | De Smet School District 38-2 / 1,727 |
| 118. | 2.24 | South Central School District 26-5 / 857 |
| 118. | 2.24 | Aberdeen School District 06-1 / 30,759 |
| 123. | 2.23 | Miller Area School District 29-4 / 3,107 |
| 123. | 2.23 | Freeman School District 33-1 / 2,462 |
| 123. | 2.23 | Hoven School District 53-2 / 1,127 |
| 123. | 2.23 | Edmunds Central School District 22-5 / 1,021 |
| 123. | 2.23 | Mitchell School District 17-2 / 18,417 |
| 123. | 2.23 | Bon Homme School District 04-2 / 4,791 |
| 129. | 2.22 | Woonsocket School District 55-4 / 1,217 |
| 129. | 2.22 | Redfield School District 56-4 / 3,549 |
| 131. | 2.21 | Custer School District 16-1 / 7,983 |
| 131. | 2.21 | Lemmon School District 52-4 / 2,124 |
| 133. | 2.20 | Mobridge-Pollock School District 62-6 / 4,318 |
| 133. | 2.20 | Spearfish School District 40-2 / 15,452 |
| 133. | 2.20 | Jones County School District 37-3 / 993 |
| 136. | 2.19 | Armour School District 21-1 / 1,054 |
| 136. | 2.19 | Lake Preston School District 38-3 / 1,174 |
| 138. | 2.18 | Gregory School District 26-4 / 2,190 |
| 138. | 2.18 | Faulkton School District 24-4 / 2,112 |
| 138. | 2.18 | Burke School District 26-2 / 1,317 |
| 141. | 2.17 | Menno School District 33-2 / 1,536 |
| 142. | 2.16 | Britton-Hecla School District 45-4 / 3,149 |
| 142. | 2.16 | Oldham-Ramona School District 39-5 / 875 |
| 142. | 2.16 | Webster School District 18-4 / 3,038 |
| 145. | 2.15 | Tripp-Delmont School District 33-5 / 1,540 |
| 146. | 2.14 | Wessington Springs School District 36-2 / 1,884 |
| 146. | 2.14 | Herreid School District 10-1 / 688 |
| 146. | 2.14 | Clark School District 12-2 / 2,566 |
| 146. | 2.14 | Selby School District 62-5 / 1,594 |
| 150. | 2.12 | Roslyn School District 18-2 / 735 |
| 151. | 2.11 | Gettysburg School District 53-1 / 1,353 |
| 152. | 2.10 | Lead-Deadwood School District 40-1 / 6,625 |
| 153. | 2.09 | Hot Springs School District 23-2 / 5,954 |
| 153. | 2.09 | Big Stone City School District 25-1 / 734 |
| 155. | 2.03 | Edgemont School District 23-1 / 1,100 |
| 156. | 1.92 | Eureka School District 44-1 / 1,305 |
Please note that we only rank locations with 'Average Household Size' data. The rank above might not be a complete list. Locations without 'Average Household Size' data are not listed.
