| Rank | Average Family Size ▼ | School District / Population |
| 1. | 8.66 | Colorado City Unified District / 5,804 |
| 2. | 6.88 | McNary Elementary District / 470 |
| 3. | 6.41 | San Carlos Unified District / 5,813 |
| 4. | 5.86 | Sanders Unified District / 6,707 |
| 5. | 5.51 | Ganado Unified District / 7,939 |
| 6. | 5.34 | Window Rock Unified District / 11,539 |
| 7. | 5.28 | Chinle Unified District / 19,670 |
| 8. | 5.23 | Fort Thomas Unified District / 4,954 |
| 9. | 5.15 | Red Mesa Unified District / 8,184 |
| 10. | 4.93 | Sacaton Elementary District / 8,141 |
| 11. | 4.82 | Tuba City Unified District / 16,364 |
| 12. | 4.79 | Whiteriver Unified District / 11,977 |
| 13. | 4.68 | Peach Springs Unified District / 818 |
| 14. | 4.62 | Murphy Elementary District / 14,300 |
| 15. | 4.60 | Cartwright Elementary District / 115,064 |
| 16. | 4.57 | Cedar Unified District / 7,910 |
| 17. | 4.55 | Isaac Elementary District / 44,051 |
| 18. | 4.55 | Indian Oasis-Baboquivari Unified District / 6,427 |
| 19. | 4.49 | Wilson Elementary District / 2,780 |
| 20. | 4.48 | Naco Elementary District / 1,681 |
| 21. | 4.40 | Pinon Unified District / 6,495 |
| 22. | 4.40 | Nogales Unified District / 22,248 |
| 23. | 4.38 | Alhambra Elementary District / 89,328 |
| 24. | 4.32 | Tolleson Elementary District / 15,597 |
| 25. | 4.27 | Kayenta Unified District / 9,496 |
| 26. | 4.26 | Riverside Elementary District / 6,925 |
| 27. | 4.19 | Union Elementary District / 14,363 |
| 28. | 4.18 | Littleton Elementary District / 38,438 |
| 29. | 4.09 | Stanfield Elementary District / 3,630 |
| 30. | 4.08 | Eloy Elementary District / 7,554 |
| 31. | 4.07 | Santa Cruz Valley Unified District / 20,454 |
| 32. | 4.04 | Tolleson Union High School District / 166,262 |
| 33. | 4.04 | Sunnyside Unified District / 88,148 |
| 34. | 4.03 | Roosevelt Elementary District / 97,634 |
| 35. | 4.03 | Phoenix Union High School District / 648,748 |
| 36. | 3.99 | Arlington Elementary District / 1,247 |
| 37. | 3.97 | Hayden-Winkelman Unified District / 1,436 |
| 38. | 3.96 | Fowler Elementary District / 28,655 |
| 39. | 3.95 | Page Unified District / 13,475 |
| 40. | 3.94 | Laveen Elementary District / 42,133 |
| 41. | 3.94 | Paloma School District / 232 |
| 42. | 3.93 | Buckeye Elementary District / 37,342 |
| 43. | 3.90 | Pendergast Elementary District / 69,209 |
| 44. | 3.88 | Santa Cruz Valley Union High School District / 17,096 |
| 45. | 3.87 | Avondale Elementary District / 46,485 |
| 46. | 3.84 | Phoenix Elementary District / 54,589 |
| 47. | 3.82 | Queen Creek Unified District / 25,762 |
| 48. | 3.81 | Glendale Elementary District / 96,561 |
| 49. | 3.81 | Pomerene Elementary District / 1,140 |
| 50. | 3.79 | Creighton Elementary District / 62,583 |
| 51. | 3.79 | Coolidge Unified District / 35,807 |
| 52. | 3.78 | Joseph City Unified District / 1,576 |
| 53. | 3.77 | Pima Unified District / 4,373 |
| 54. | 3.76 | Holbrook Unified District / 10,176 |
| 55. | 3.76 | Palo Verde Elementary District / 2,075 |
| 56. | 3.75 | Buckeye Union High School District / 64,134 |
| 57. | 3.74 | J. O. Combs Unified School District / 31,162 |
| 58. | 3.70 | Snowflake Unified District / 12,172 |
| 59. | 3.69 | Saddle Mountain Unified School District / 7,573 |
| 60. | 3.69 | Round Valley Unified District / 8,582 |
| 61. | 3.69 | Gadsden Elementary District / 23,777 |
| 62. | 3.68 | Douglas Unified District / 21,545 |
| 63. | 3.67 | Gila Bend Unified District / 2,397 |
| 64. | 3.63 | Thatcher Unified District / 6,955 |
| 65. | 3.62 | Redington Elementary District / 57 |
| 66. | 3.60 | Santa Cruz Elementary District / 1,450 |
| 67. | 3.60 | Concho Elementary District / 2,538 |
| 68. | 3.58 | Glendale Union High School District / 329,556 |
| 69. | 3.58 | St. Johns Unified District / 3,947 |
| 70. | 3.57 | Winslow Unified District / 11,729 |
| 71. | 3.56 | Altar Valley Elementary District / 6,420 |
| 72. | 3.55 | Higley Unified District / 62,748 |
| 73. | 3.55 | Name N/A / 2,139,438 |
| 74. | 3.54 | Aguila Elementary District / 847 |
| 75. | 3.54 | Florence Unified School District / 71,916 |
| 76. | 3.53 | Miami Unified District / 8,975 |
| 77. | 3.53 | Agua Fria Union High School District / 120,394 |
| 78. | 3.53 | Red Rock Elementary District / 2,296 |
| 79. | 3.52 | Fort Huachuca Accommodation District / 5,428 |
| 80. | 3.51 | Casa Grande Union High School District / 84,541 |
| 81. | 3.51 | Littlefield Unified District / 2,540 |
| 82. | 3.50 | Liberty Elementary District / 23,470 |
| 83. | 3.49 | Maricopa Unified School District / 45,298 |
| 84. | 3.49 | Washington Elementary District / 232,995 |
| 85. | 3.48 | Solomon Elementary District / 3,329 |
| 86. | 3.47 | Safford Unified District / 15,946 |
| 87. | 3.47 | Gilbert Unified District / 189,467 |
| 88. | 3.46 | Nadaburg Unified School District / 7,828 |
| 89. | 3.46 | Mammoth-San Manuel Unified District / 5,401 |
| 90. | 3.45 | Tempe School District / 145,370 |
| 91. | 3.45 | Balsz Elementary District / 26,679 |
| 92. | 3.44 | Heber-Overgaard Unified District / 4,055 |
| 93. | 3.44 | Casa Grande Elementary District / 61,105 |
| 94. | 3.43 | Hillside Elementary District / 78 |
| 95. | 3.43 | Somerton Elementary District / 21,781 |
| 96. | 3.40 | Vernon Elementary District / 1,641 |
| 97. | 3.36 | Osborn Elementary District / 38,490 |
| 98. | 3.36 | Chandler Unified District / 222,174 |
| 99. | 3.35 | Dysart Unified District / 160,545 |
| 100. | 3.35 | Deer Valley Unified District / 239,388 |
| 101. | 3.34 | Litchfield Elementary District / 73,909 |
| 102. | 3.34 | Sahuarita Unified District / 26,552 |
| 103. | 3.33 | St. David Unified District / 4,020 |
| 104. | 3.31 | Mesa Unified District / 458,673 |
| 105. | 3.31 | Double Adobe Elementary District / 692 |
| 106. | 3.31 | Peoria Unified School District / 211,900 |
| 107. | 3.30 | Globe Unified District / 10,351 |
| 108. | 3.29 | Vail Unified District / 50,994 |
| 109. | 3.29 | Tempe Union High School District / 300,672 |
| 110. | 3.29 | Tucson Unified District / 479,107 |
| 111. | 3.29 | Bagdad Unified School District / 2,234 |
| 112. | 3.28 | Bonita Elementary District / 1,518 |
| 113. | 3.25 | Picacho Elementary District / 7,246 |
| 114. | 3.24 | Crane Elementary District / 43,272 |
| 115. | 3.24 | Ajo Unified District / 3,416 |
| 116. | 3.24 | Fredonia-Moccasin Unified District / 2,517 |
| 117. | 3.23 | Flagstaff Unified District / 93,101 |
| 118. | 3.22 | Marana Unified District / 86,240 |
| 119. | 3.21 | Bowie Unified District / 467 |
| 120. | 3.21 | Camp Verde Unified District / 11,307 |
| 121. | 3.20 | Flowing Wells Unified District / 28,987 |
| 122. | 3.20 | Superior Unified School District / 3,078 |
| 123. | 3.19 | Kyrene Elementary District / 155,302 |
| 124. | 3.19 | Willcox Unified District / 7,809 |
| 125. | 3.18 | Paradise Valley Unified District / 246,814 |
| 126. | 3.18 | Clarkdale-Jerome Elementary District / 3,772 |
| 127. | 3.17 | Humboldt Unified District / 50,272 |
| 128. | 3.16 | Palominas Elementary District / 9,836 |
| 129. | 3.16 | Ray Unified District / 3,669 |
| 130. | 3.15 | Show Low Unified District / 15,373 |
| 131. | 3.14 | Ash Fork Joint Unified District / 1,810 |
| 132. | 3.14 | Sentinel Elementary District / 71 |
| 133. | 3.12 | Toltec Elementary District / 11,665 |
| 134. | 3.12 | Yuma Union High School District / 190,582 |
| 135. | 3.12 | Williams Unified District / 5,615 |
| 136. | 3.11 | Tombstone Unified District / 7,463 |
| 137. | 3.10 | Topock Elementary District / 2,484 |
| 138. | 3.08 | Morenci Unified District / 3,396 |
| 139. | 3.08 | Bisbee Unified District / 7,130 |
| 140. | 3.08 | Mingus Union High School District / 34,266 |
| 141. | 3.07 | Cottonwood-Oak Creek Elementary District / 30,494 |
| 142. | 3.04 | Mohawk Valley Elementary District / 1,261 |
| 143. | 3.04 | Kingman Unified School District / 68,630 |
| 144. | 3.04 | McNeal Elementary District / 1,544 |
| 145. | 3.02 | Chino Valley Unified District / 21,826 |
| 146. | 3.01 | Bullhead City School District / 39,991 |
| 147. | 3.01 | Ash Creek Elementary District / 1,050 |
| 148. | 3.00 | Eagle Elementary District / 37 |
| 149. | 2.99 | Sierra Vista Unified District / 49,053 |
| 150. | 2.99 | Madison Elementary District / 54,192 |
| 151. | 2.98 | Blue Ridge Unified District / 15,727 |
| 152. | 2.98 | Colorado River Union High School District / 64,652 |
| 153. | 2.97 | Amphitheater Unified District / 134,440 |
| 154. | 2.96 | Clifton Unified District / 2,903 |
| 155. | 2.96 | Elfrida Elementary District / 1,160 |
| 156. | 2.94 | Valentine Elementary District / 186 |
| 157. | 2.94 | Beaver Creek Elementary District / 5,105 |
| 158. | 2.93 | Hyder Elementary District / 553 |
| 159. | 2.93 | Tanque Verde Unified District / 11,898 |
| 160. | 2.93 | Scottsdale Unified District / 224,266 |
| 161. | 2.92 | Empire Elementary District / 370 |
| 162. | 2.91 | Young Elementary School District / 407 |
| 163. | 2.91 | Mohave Valley Elementary District / 22,177 |
| 164. | 2.89 | Cochise Elementary District / 273 |
| 165. | 2.89 | Yuma Elementary District / 101,752 |
| 166. | 2.87 | Payson Unified District / 21,631 |
| 167. | 2.86 | Benson Unified School District / 7,780 |
| 168. | 2.85 | Apache Junction Unified District / 56,883 |
| 169. | 2.84 | Morristown Elementary District / 1,665 |
| 170. | 2.83 | Rucker Elementary District / 17 |
| 171. | 2.83 | Lake Havasu Unified District / 55,708 |
| 172. | 2.82 | San Simon Unified District / 804 |
| 173. | 2.81 | Valley Union High School District / 4,187 |
| 174. | 2.80 | Kirkland Elementary District / 1,023 |
| 175. | 2.76 | Antelope Union High School District / 5,838 |
| 176. | 2.75 | Maine Consolidated School District / 1,003 |
| 177. | 2.74 | Skull Valley Elementary District / 449 |
| 178. | 2.72 | Catalina Foothills Unified District / 31,525 |
| 179. | 2.72 | Cave Creek Unified District / 53,421 |
| 180. | 2.72 | Duncan Unified District / 2,223 |
| 181. | 2.70 | Hackberry School District / 1,184 |
| 182. | 2.69 | Mobile Elementary District / 38 |
| 183. | 2.69 | Sonoita Elementary District / 1,681 |
| 184. | 2.68 | Prescott Unified District / 56,880 |
| 185. | 2.68 | Grand Canyon Unified District / 1,420 |
| 186. | 2.67 | Fountain Hills Unified District / 23,030 |
| 187. | 2.67 | Wellton Elementary District / 4,024 |
| 188. | 2.65 | Mayer Unified District / 5,015 |
| 189. | 2.64 | Pearce Elementary District / 1,977 |
| 190. | 2.63 | Pine Strawberry Elementary District / 2,208 |
| 191. | 2.62 | Owens-Whitney Elementary District / 570 |
| 192. | 2.61 | Patagonia Union High School District / 2,905 |
| 193. | 2.59 | Parker Unified School District / 10,932 |
| 194. | 2.58 | Yarnell Elementary District / 1,231 |
| 195. | 2.52 | Wenden Elementary District / 767 |
| 196. | 2.51 | Sedona-Oak Creek Joint Unified District / 14,374 |
| 197. | 2.50 | Patagonia Elementary District / 1,224 |
| 198. | 2.50 | Walnut Grove Elementary District / 53 |
| 199. | 2.49 | Tonto Basin Elementary District / 1,221 |
| 200. | 2.49 | Wickenburg Unified District / 10,671 |
| 201. | 2.47 | Congress Elementary District / 1,828 |
| 202. | 2.44 | Chevelon Butte School District / 401 |
| 203. | 2.41 | Williamson Valley Elementary School District / 371 |
| 204. | 2.40 | Oracle Elementary District / 13,523 |
| 205. | 2.39 | Yucca Elementary District / 374 |
| 206. | 2.34 | Canon Elementary District / 2,222 |
| 207. | 2.33 | Name N/A / 66,046 |
| 208. | 2.31 | Salome Consolidated Elementary District / 2,424 |
| 209. | 2.31 | Seligman Unified District / 837 |
| 210. | 2.26 | Bicentennial Union High School District / 9,528 |
| 211. | 2.22 | Quartzsite Elementary District / 5,387 |
| 212. | 2.20 | Klondyke Elementary District / 40 |
| 213. | 2.19 | Crown King Elementary District / 56 |
| 214. | 2.16 | Continental Elementary District / 26,101 |
| 215. | 2.14 | Apache Elementary District / 106 |
| 216. | 2.08 | Bouse Elementary District / 950 |
| 217. | 2.07 | Alpine Elementary District / 401 |
| 218. | 2.00 | San Fernando Elementary District / 37 |
| 218. | 2.00 | Blue Elementary District / 33 |
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.
