| Rank | Average Family Size ▼ | School District / Population |
| 1. | 3.57 | Fort Campbell Schools / 5,651 |
| 2. | 3.53 | Dayton City Elementary School District / 7,118 |
| 2. | 3.53 | Rhea County School District in Dayton / 7,118 |
| 4. | 3.47 | Memphis City School District / 654,876 |
| 5. | 3.41 | Smith County School District / 19,035 |
| 6. | 3.39 | West Carroll Special District / 6,952 |
| 7. | 3.37 | Hollow Rock-Bruceton Special School District / 3,809 |
| 8. | 3.36 | Sequatchie County School District / 13,814 |
| 9. | 3.35 | Lake County School District / 7,827 |
| 10. | 3.32 | Lauderdale County School District / 27,745 |
| 11. | 3.30 | Gibson County School District / 18,613 |
| 12. | 3.29 | Bedford County School District / 44,172 |
| 13. | 3.27 | Trousdale County School District / 7,751 |
| 14. | 3.27 | Shelby County School District / 267,820 |
| 15. | 3.26 | Lewis County School District / 12,003 |
| 16. | 3.26 | Jackson-Madison Consolidated School District / 97,378 |
| 17. | 3.26 | Rutherford County School District / 147,702 |
| 18. | 3.26 | Lenoir City School District / 8,360 |
| 19. | 3.25 | Warren County School District / 39,539 |
| 20. | 3.25 | Polk County School District / 16,690 |
| 21. | 3.23 | Scott County School District / 18,930 |
| 22. | 3.23 | Newport City Elementary School District / 7,023 |
| 22. | 3.23 | Cocke County School District in Newport / 7,023 |
| 24. | 3.22 | Grundy County School District / 13,910 |
| 25. | 3.21 | Williamson County School District / 139,155 |
| 26. | 3.21 | Hardeman County School District / 27,655 |
| 27. | 3.20 | Van Buren County School District / 5,503 |
| 28. | 3.19 | Coffee County School District in Manchester / 9,812 |
| 28. | 3.19 | Manchester City School District / 9,812 |
| 30. | 3.19 | Alcoa City School District / 8,355 |
| 31. | 3.19 | Tipton County School District / 59,689 |
| 32. | 3.18 | Trenton Special School District / 8,735 |
| 33. | 3.18 | Robertson County School District / 64,347 |
| 34. | 3.18 | Lawrence County School District / 41,319 |
| 35. | 3.16 | Athens City Elementary School District / 13,491 |
| 35. | 3.16 | McMinn County School District in Athens / 13,491 |
| 37. | 3.16 | South Carroll Special School District / 2,708 |
| 38. | 3.16 | Humboldt City School District / 8,504 |
| 39. | 3.16 | White County School District / 25,460 |
| 40. | 3.16 | Union County School District / 19,088 |
| 41. | 3.15 | Nashville-Davidson County School District / 612,884 |
| 42. | 3.15 | Montgomery County School District / 157,952 |
| 43. | 3.15 | Macon County School District / 21,934 |
| 44. | 3.15 | Cheatham County School District / 38,809 |
| 45. | 3.15 | Crockett County School District / 6,659 |
| 46. | 3.14 | Alamo Town School District / 4,410 |
| 46. | 3.14 | Crockett County School District in Alamo / 4,410 |
| 48. | 3.14 | Dickson County School District / 48,712 |
| 49. | 3.14 | Fayette County School District / 37,458 |
| 50. | 3.14 | Lebanon Special School District / 28,341 |
| 50. | 3.14 | Wilson County School District in Lebanon / 28,341 |
| 52. | 3.14 | Haywood County School District / 19,010 |
| 53. | 3.13 | Grainger County School District / 22,419 |
| 54. | 3.12 | Milan City Special School District / 9,831 |
| 55. | 3.12 | Monroe County School District in Sweetwater / 11,777 |
| 55. | 3.12 | Sweetwater City School District / 11,777 |
| 57. | 3.10 | Rutherford County School District in Murfreesboro / 102,815 |
| 57. | 3.10 | Murfreesboro City Elementary School District / 102,815 |
| 59. | 3.10 | Sumner County School District / 155,592 |
| 60. | 3.10 | Hamblen County School District / 61,857 |
| 61. | 3.10 | Obion County School District / 21,066 |
| 62. | 3.10 | Claiborne County School District / 31,901 |
| 63. | 3.10 | Hardin County School District / 25,995 |
| 64. | 3.10 | Campbell County School District / 40,623 |
| 65. | 3.10 | McNairy County School District / 25,760 |
| 66. | 3.10 | Jackson County School District / 11,491 |
| 67. | 3.10 | Wayne County School District / 17,016 |
| 68. | 3.09 | Bradley County School District / 56,685 |
| 69. | 3.09 | Union City School District / 10,839 |
| 70. | 3.09 | Oneida Special School District / 3,241 |
| 71. | 3.09 | Franklin County School District / 41,054 |
| 72. | 3.08 | Hickman County School District / 24,506 |
| 73. | 3.08 | Henderson County School District / 19,877 |
| 74. | 3.08 | Putnam County School District / 70,570 |
| 75. | 3.08 | Jefferson County School District / 50,600 |
| 76. | 3.08 | Giles County School District / 29,558 |
| 77. | 3.08 | Chester County School District / 16,793 |
| 78. | 3.07 | Huntingdon Special School District / 7,458 |
| 79. | 3.07 | Wilson County School District / 81,222 |
| 80. | 3.07 | Name N/A / 267,239 |
| 81. | 3.07 | Marion County School District / 27,267 |
| 82. | 3.06 | Bells City School District / 3,455 |
| 82. | 3.06 | Crockett County School District in Bells / 3,455 |
| 84. | 3.06 | Cannon County School District / 13,631 |
| 85. | 3.06 | Marshall County School District / 29,902 |
| 86. | 3.06 | Dyer County School District / 20,961 |
| 87. | 3.05 | Anderson County School District / 38,617 |
| 88. | 3.05 | Bradford Special School District / 3,332 |
| 89. | 3.04 | Franklin Special School District / 35,105 |
| 89. | 3.04 | Williamson County School District in Franklin / 35,105 |
| 91. | 3.04 | Hamilton County School District / 328,960 |
| 92. | 3.04 | Bledsoe County School District / 12,946 |
| 93. | 3.03 | Coffee County School District / 25,111 |
| 94. | 3.02 | DeKalb County School District / 18,569 |
| 95. | 3.02 | Tullahoma City School District / 17,421 |
| 96. | 3.02 | Decatur County School District / 11,716 |
| 97. | 3.02 | Maryville City School District / 26,864 |
| 98. | 3.02 | Elizabethton City School District / 14,306 |
| 99. | 3.01 | Moore County School District / 6,266 |
| 100. | 3.01 | Monroe County School District / 32,238 |
| 101. | 3.01 | Cleveland City School District / 40,507 |
| 102. | 3.00 | Oak Ridge City School District / 28,925 |
| 103. | 3.00 | McKenzie Special School District / 7,717 |
| 104. | 3.00 | Knox County School District / 423,748 |
| 105. | 2.99 | Johnson City School District / 58,670 |
| 106. | 2.98 | Blount County School District / 85,921 |
| 107. | 2.98 | Unicoi County School District / 18,257 |
| 108. | 2.98 | Overton County School District / 21,777 |
| 109. | 2.98 | Houston County School District / 8,286 |
| 110. | 2.98 | Rhea County School District / 24,097 |
| 111. | 2.97 | Washington County School District / 61,098 |
| 112. | 2.97 | Maury County School District / 79,029 |
| 113. | 2.97 | Humphreys County School District / 18,416 |
| 114. | 2.97 | Dyersburg City School District / 17,213 |
| 115. | 2.96 | Stewart County School District / 13,133 |
| 116. | 2.96 | Lincoln County School District / 26,043 |
| 117. | 2.95 | Benton County School District / 16,456 |
| 118. | 2.92 | Morgan County School District / 21,664 |
| 119. | 2.92 | Weakley County School District / 34,557 |
| 120. | 2.92 | McMinn County School District / 35,044 |
| 121. | 2.92 | Fentress County School District / 17,777 |
| 122. | 2.91 | Richard City Special School District / 856 |
| 123. | 2.91 | Roane County School District / 51,127 |
| 124. | 2.90 | Cumberland County School District / 54,977 |
| 125. | 2.90 | Meigs County School District / 11,581 |
| 126. | 2.90 | Henry County School District in Paris / 11,706 |
| 126. | 2.90 | Paris City Special School District / 11,706 |
| 128. | 2.88 | Henry County School District / 20,336 |
| 129. | 2.87 | Etowah City Elementary School District / 3,540 |
| 129. | 2.87 | McMinn County School District in Etowah / 3,540 |
| 131. | 2.87 | Cocke County School District / 28,450 |
| 132. | 2.87 | Perry County School District / 7,778 |
| 133. | 2.87 | Anderson County School District in Clinton / 9,744 |
| 133. | 2.87 | Clinton City Elementary School District / 9,744 |
| 135. | 2.85 | Hawkins County School District / 49,270 |
| 136. | 2.85 | Carter County School District / 43,404 |
| 137. | 2.85 | Bristol City School District / 26,311 |
| 138. | 2.84 | Sullivan County School District / 83,423 |
| 139. | 2.83 | Kingsport City School District / 48,954 |
| 140. | 2.83 | Henderson County School District in Lexington / 7,641 |
| 140. | 2.83 | Lexington City Elementary School District / 7,641 |
| 142. | 2.82 | Greene County School District / 52,861 |
| 143. | 2.82 | Loudon County School District / 38,742 |
| 144. | 2.82 | Hawkins County School District in Rogersville / 4,419 |
| 144. | 2.82 | Rogersville Town Elementary School District / 4,419 |
| 146. | 2.81 | Pickett County School District / 5,072 |
| 147. | 2.77 | Johnson County School District / 18,190 |
| 148. | 2.75 | Lincoln County School District in Fayetteville / 6,842 |
| 148. | 2.75 | Fayetteville City Elementary School District / 6,842 |
| 150. | 2.75 | Hancock County School District / 6,782 |
| 151. | 2.74 | Greeneville City School District / 15,311 |
| 152. | 2.73 | Sevier County School District / 87,507 |
| 153. | 2.63 | Clay County School District / 7,888 |
Please note that we only rank locations with 'Average Family Size' data. The rank above might not be a complete list. Locations without 'Average Family Size' 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.
