| Rank | Average Family Size ▼ | School District / Population |
| 1. | 3.57 | Fort Campbell Schools / 6,825 |
| 2. | 3.47 | Haywood County School District / 18,389 |
| 3. | 3.46 | Name N/A / 936,130 |
| 4. | 3.43 | Rutherford County School District / 160,718 |
| 5. | 3.36 | Lebanon Special School District / 31,609 |
| 5. | 3.36 | Wilson County School District in Lebanon / 31,609 |
| 7. | 3.35 | Scott County School District / 18,990 |
| 8. | 3.34 | McNairy County School District / 26,138 |
| 9. | 3.34 | Hardeman County School District / 26,560 |
| 10. | 3.33 | Chester County School District / 17,270 |
| 11. | 3.33 | Williamson County School District / 157,105 |
| 12. | 3.33 | West Carroll Special District / 7,181 |
| 13. | 3.33 | Tipton County School District / 61,433 |
| 14. | 3.32 | Lenoir City School District / 8,769 |
| 15. | 3.30 | Crockett County School District / 6,419 |
| 16. | 3.30 | Athens City Elementary School District / 13,603 |
| 16. | 3.30 | McMinn County School District in Athens / 13,603 |
| 18. | 3.29 | DeKalb County School District / 18,968 |
| 19. | 3.29 | Jackson-Madison Consolidated School District / 98,364 |
| 20. | 3.28 | Cleveland City School District / 42,331 |
| 21. | 3.28 | Gibson County School District / 18,959 |
| 22. | 3.27 | Hardin County School District / 25,969 |
| 23. | 3.27 | Nashville-Davidson County School District / 648,048 |
| 24. | 3.27 | Montgomery County School District / 175,190 |
| 25. | 3.27 | Trousdale County School District / 7,859 |
| 26. | 3.26 | Dickson County School District / 50,115 |
| 27. | 3.26 | Etowah City Elementary School District / 3,498 |
| 27. | 3.26 | McMinn County School District in Etowah / 3,498 |
| 29. | 3.26 | Bells City School District / 3,965 |
| 29. | 3.26 | Crockett County School District in Bells / 3,965 |
| 31. | 3.26 | White County School District / 26,086 |
| 32. | 3.25 | Bledsoe County School District / 13,240 |
| 33. | 3.24 | Robertson County School District / 67,024 |
| 34. | 3.24 | Bedford County School District / 45,660 |
| 35. | 3.23 | Coffee County School District / 25,575 |
| 36. | 3.21 | Lawrence County School District / 42,084 |
| 37. | 3.20 | Marshall County School District / 30,977 |
| 38. | 3.20 | South Carroll Special School District / 2,606 |
| 39. | 3.19 | Warren County School District / 39,867 |
| 40. | 3.19 | Hickman County School District / 24,354 |
| 41. | 3.19 | Trenton Special School District / 8,632 |
| 42. | 3.19 | Cheatham County School District / 39,324 |
| 43. | 3.19 | Union County School District / 19,139 |
| 44. | 3.19 | Sumner County School District / 166,636 |
| 45. | 3.18 | Wilson County School District / 87,975 |
| 46. | 3.18 | Rhea County School District / 24,956 |
| 47. | 3.18 | Hollow Rock-Bruceton Special School District / 4,123 |
| 48. | 3.18 | Dayton City Elementary School District / 7,316 |
| 48. | 3.18 | Rhea County School District in Dayton / 7,316 |
| 50. | 3.18 | Maury County School District / 82,729 |
| 51. | 3.17 | Maryville City School District / 27,557 |
| 52. | 3.17 | Murfreesboro City Elementary School District / 114,743 |
| 52. | 3.17 | Rutherford County School District in Murfreesboro / 114,743 |
| 54. | 3.17 | Van Buren County School District / 5,578 |
| 55. | 3.16 | Henderson County School District / 20,192 |
| 56. | 3.16 | Hamblen County School District / 62,863 |
| 57. | 3.15 | Bradley County School District / 58,673 |
| 58. | 3.15 | Smith County School District / 19,092 |
| 59. | 3.15 | Name N/A / 278,354 |
| 60. | 3.15 | McMinn County School District / 35,308 |
| 61. | 3.14 | Lauderdale County School District / 27,619 |
| 62. | 3.14 | Campbell County School District / 40,361 |
| 63. | 3.14 | Oneida Special School District / 3,114 |
| 64. | 3.13 | Oak Ridge City School District / 29,301 |
| 65. | 3.13 | Richard City Special School District / 975 |
| 66. | 3.13 | Humboldt City School District / 8,334 |
| 67. | 3.13 | Grundy County School District / 13,574 |
| 68. | 3.12 | Henderson County School District in Lexington / 7,771 |
| 68. | 3.12 | Lexington City Elementary School District / 7,771 |
| 70. | 3.12 | Hamilton County School District / 344,772 |
| 71. | 3.12 | Monroe County School District in Sweetwater / 12,004 |
| 71. | 3.12 | Sweetwater City School District / 12,004 |
| 73. | 3.12 | Anderson County School District / 39,180 |
| 74. | 3.12 | Knox County School District / 440,732 |
| 75. | 3.12 | Dyer County School District / 21,158 |
| 76. | 3.11 | Macon County School District / 22,582 |
| 77. | 3.10 | Morgan County School District / 21,866 |
| 78. | 3.10 | Huntingdon Special School District / 7,163 |
| 79. | 3.10 | Milan City Special School District / 9,967 |
| 80. | 3.10 | Houston County School District / 8,356 |
| 81. | 3.10 | Cannon County School District / 13,786 |
| 82. | 3.10 | Fayette County School District / 38,664 |
| 83. | 3.09 | McKenzie Special School District / 7,438 |
| 84. | 3.09 | Overton County School District / 22,109 |
| 85. | 3.09 | Williamson County School District in Franklin / 36,816 |
| 85. | 3.09 | Franklin Special School District / 36,816 |
| 87. | 3.08 | Bradford Special School District / 3,740 |
| 88. | 3.08 | Grainger County School District / 22,724 |
| 89. | 3.08 | Stewart County School District / 13,311 |
| 90. | 3.07 | Henry County School District in Paris / 11,518 |
| 90. | 3.07 | Paris City Special School District / 11,518 |
| 92. | 3.07 | Alcoa City School District / 8,178 |
| 93. | 3.07 | Humphreys County School District / 18,322 |
| 94. | 3.06 | Giles County School District / 29,064 |
| 95. | 3.06 | Lewis County School District / 12,010 |
| 96. | 3.06 | Roane County School District / 50,404 |
| 97. | 3.05 | Jefferson County School District / 52,166 |
| 98. | 3.05 | Blount County School District / 88,700 |
| 99. | 3.05 | Coffee County School District in Manchester / 10,122 |
| 99. | 3.05 | Manchester City School District / 10,122 |
| 101. | 3.05 | Sevier County School District / 92,561 |
| 102. | 3.04 | Jackson County School District / 11,555 |
| 103. | 3.03 | Lincoln County School District / 26,507 |
| 104. | 3.03 | Claiborne County School District / 31,841 |
| 105. | 3.03 | Sequatchie County School District / 14,431 |
| 106. | 3.02 | Alamo Town School District / 4,215 |
| 106. | 3.02 | Crockett County School District in Alamo / 4,215 |
| 108. | 3.02 | Greeneville City School District / 15,018 |
| 109. | 3.02 | Polk County School District / 16,715 |
| 110. | 3.02 | Fentress County School District / 17,922 |
| 111. | 3.02 | Monroe County School District / 32,998 |
| 112. | 3.02 | Putnam County School District / 73,237 |
| 113. | 3.01 | Wayne County School District / 16,967 |
| 114. | 3.01 | Obion County School District / 20,603 |
| 115. | 3.01 | Hancock County School District / 6,706 |
| 116. | 3.00 | Clay County School District / 7,802 |
| 117. | 3.00 | Marion County School District / 27,286 |
| 118. | 3.00 | Bristol City School District / 26,608 |
| 119. | 2.98 | Moore County School District / 6,348 |
| 120. | 2.98 | Fayetteville City Elementary School District / 6,991 |
| 121. | 2.98 | Meigs County School District / 11,694 |
| 122. | 2.97 | Benton County School District / 16,345 |
| 123. | 2.97 | Cocke County School District / 28,563 |
| 124. | 2.97 | Unicoi County School District / 18,175 |
| 125. | 2.97 | Lake County School District / 7,725 |
| 126. | 2.96 | Clinton City Elementary School District / 9,874 |
| 126. | 2.96 | Anderson County School District in Clinton / 9,874 |
| 128. | 2.96 | Perry County School District / 7,851 |
| 129. | 2.96 | Johnson City School District / 60,565 |
| 130. | 2.95 | Hawkins County School District / 49,460 |
| 131. | 2.93 | Henry County School District / 20,761 |
| 132. | 2.93 | Dyersburg City School District / 16,998 |
| 133. | 2.93 | Weakley County School District / 34,699 |
| 134. | 2.93 | Sullivan County School District / 80,615 |
| 135. | 2.92 | Franklin County School District / 41,069 |
| 136. | 2.91 | Cumberland County School District / 57,064 |
| 137. | 2.91 | Tullahoma City School District / 17,454 |
| 138. | 2.88 | Greene County School District / 53,578 |
| 139. | 2.87 | Kingsport City School District / 52,498 |
| 140. | 2.86 | Carter County School District / 42,976 |
| 141. | 2.86 | Union City School District / 10,775 |
| 142. | 2.85 | Cocke County School District in Newport / 6,890 |
| 142. | 2.85 | Newport City Elementary School District / 6,890 |
| 144. | 2.85 | Johnson County School District / 18,089 |
| 145. | 2.84 | Loudon County School District / 40,980 |
| 146. | 2.84 | Elizabethton City School District / 14,322 |
| 147. | 2.84 | Washington County School District / 64,233 |
| 148. | 2.82 | Rogersville Town Elementary School District / 4,410 |
| 148. | 2.82 | Hawkins County School District in Rogersville / 4,410 |
| 150. | 2.80 | Decatur County School District / 11,675 |
| 151. | 2.53 | Pickett County School District / 5,101 |
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.
