| Rank | Average Family Size ▼ | School District / Population |
| 1. | 9.27 | Colorado City Unified District / 5,076 |
| 2. | 7.45 | San Carlos Unified District / 6,435 |
| 3. | 5.34 | McNary Elementary District / 549 |
| 4. | 5.30 | Window Rock Unified District / 11,691 |
| 5. | 5.19 | Indian Oasis-Baboquivari Unified District / 6,492 |
| 6. | 4.93 | Chinle Unified District / 18,513 |
| 7. | 4.92 | Ganado Unified District / 8,590 |
| 8. | 4.92 | Whiteriver Unified District / 12,027 |
| 9. | 4.89 | Red Mesa Unified District / 8,289 |
| 10. | 4.87 | Cedar Unified District / 9,579 |
| 11. | 4.85 | Mobile Elementary District / 78 |
| 12. | 4.83 | Cartwright Elementary District / 128,204 |
| 13. | 4.81 | Wilson Elementary District / 3,714 |
| 14. | 4.77 | Isaac Elementary District / 48,204 |
| 15. | 4.69 | Santa Cruz Valley Unified District / 18,100 |
| 16. | 4.68 | Nogales Unified District / 21,121 |
| 17. | 4.64 | Tuba City Unified District / 16,275 |
| 18. | 4.60 | Tolleson Elementary District / 15,982 |
| 19. | 4.59 | Sanders Unified District / 5,165 |
| 20. | 4.58 | Fort Thomas Unified District / 5,012 |
| 21. | 4.57 | Kayenta Unified District / 10,959 |
| 22. | 4.56 | Santa Cruz Elementary District / 1,293 |
| 22. | 4.56 | Name N/A / 1,293 |
| 24. | 4.55 | Union Elementary District / 13,994 |
| 25. | 4.52 | Murphy Elementary District / 15,926 |
| 26. | 4.52 | Alhambra Elementary District / 95,088 |
| 27. | 4.44 | Roosevelt Elementary District / 103,933 |
| 28. | 4.36 | Fowler Elementary District / 28,984 |
| 29. | 4.33 | Sunnyside Unified District / 85,533 |
| 30. | 4.30 | Phoenix Union High School District / 700,904 |
| 31. | 4.28 | Littleton Elementary District / 35,787 |
| 32. | 4.28 | Tolleson Union High School District / 168,751 |
| 33. | 4.26 | Arlington Elementary District / 1,052 |
| 34. | 4.21 | Creighton Elementary District / 73,841 |
| 35. | 4.19 | Avondale Elementary District / 41,616 |
| 36. | 4.16 | Phoenix Elementary District / 59,138 |
| 37. | 4.15 | Riverside Elementary District / 6,350 |
| 38. | 4.14 | Pendergast Elementary District / 74,004 |
| 39. | 4.14 | Pinon Unified District / 5,695 |
| 40. | 4.11 | Hayden-Winkelman Unified District / 1,642 |
| 41. | 4.10 | Glendale Elementary District / 109,689 |
| 42. | 4.10 | St. Johns Unified District / 3,821 |
| 43. | 4.08 | Paloma School District / 84 |
| 44. | 4.07 | Laveen Elementary District / 34,100 |
| 45. | 4.07 | Naco Elementary District / 1,461 |
| 46. | 4.06 | Aguila Elementary District / 725 |
| 47. | 4.04 | Queen Creek Unified District / 19,481 |
| 48. | 4.00 | Buckeye Elementary District / 31,375 |
| 49. | 3.97 | Sacaton Elementary District / 6,817 |
| 50. | 3.96 | Empire Elementary District / 251 |
| 51. | 3.95 | Holbrook Unified District / 10,594 |
| 52. | 3.89 | Winslow Unified District / 11,931 |
| 53. | 3.89 | Littlefield Unified District / 2,083 |
| 54. | 3.86 | Buckeye Union High School District / 52,309 |
| 55. | 3.85 | Snowflake Unified District / 11,371 |
| 56. | 3.84 | Balsz Elementary District / 29,825 |
| 57. | 3.84 | Page Unified District / 12,835 |
| 58. | 3.79 | Saddle Mountain Unified School District / 4,422 |
| 59. | 3.76 | Joseph City Unified District / 1,824 |
| 60. | 3.75 | Glendale Union High School District / 361,673 |
| 61. | 3.73 | St. David Unified District / 4,342 |
| 62. | 3.72 | Peach Springs Unified District / 470 |
| 63. | 3.72 | Agua Fria Union High School District / 103,200 |
| 64. | 3.71 | Higley Unified District / 55,581 |
| 65. | 3.71 | Altar Valley Elementary District / 6,439 |
| 66. | 3.70 | Osborn Elementary District / 42,426 |
| 67. | 3.70 | Name N/A / 2,169,748 |
| 68. | 3.67 | Liberty Elementary District / 18,280 |
| 69. | 3.65 | Gadsden Elementary District / 21,807 |
| 70. | 3.65 | Tempe School District / 152,175 |
| 71. | 3.64 | Gilbert Unified District / 195,386 |
| 72. | 3.61 | Washington Elementary District / 251,984 |
| 73. | 3.60 | Bagdad Unified School District / 2,176 |
| 74. | 3.56 | Morenci Unified District / 3,212 |
| 75. | 3.56 | Camp Verde Unified District / 11,363 |
| 76. | 3.56 | Sahuarita Unified District / 23,307 |
| 77. | 3.55 | Miami Unified District / 8,227 |
| 78. | 3.54 | Nadaburg Unified School District / 4,983 |
| 79. | 3.54 | Pima Unified District / 3,380 |
| 80. | 3.53 | Elfrida Elementary District / 1,228 |
| 81. | 3.49 | Mesa Unified District / 469,321 |
| 82. | 3.49 | Round Valley Unified District / 9,327 |
| 83. | 3.49 | Douglas Unified District / 20,738 |
| 84. | 3.49 | Palo Verde Elementary District / 1,602 |
| 85. | 3.48 | Somerton Elementary District / 17,490 |
| 86. | 3.48 | Fort Huachuca Accommodation District / 5,447 |
| 87. | 3.48 | Stanfield Elementary District / 4,594 |
| 88. | 3.47 | Deer Valley Unified District / 222,295 |
| 89. | 3.47 | Peoria Unified School District / 205,352 |
| 90. | 3.47 | Tucson Unified District / 490,162 |
| 91. | 3.46 | Chandler Unified District / 212,123 |
| 92. | 3.45 | Litchfield Elementary District / 61,584 |
| 93. | 3.44 | Tempe Union High School District / 315,198 |
| 94. | 3.44 | Eloy Elementary District / 7,725 |
| 95. | 3.43 | Flowing Wells Unified District / 30,647 |
| 96. | 3.42 | Dysart Unified District / 121,661 |
| 97. | 3.40 | Gila Bend Unified District / 1,392 |
| 98. | 3.40 | Klondyke Elementary District / 45 |
| 99. | 3.40 | Solomon Elementary District / 2,783 |
| 100. | 3.39 | Coolidge Unified District / 30,027 |
| 101. | 3.39 | Palominas Elementary District / 10,305 |
| 102. | 3.39 | Sentinel Elementary District / 61 |
| 103. | 3.38 | Name N/A / 14,464 |
| 104. | 3.36 | Marana Unified District / 86,821 |
| 105. | 3.36 | Santa Cruz Valley Union High School District / 13,076 |
| 106. | 3.36 | Vail Unified District / 46,184 |
| 107. | 3.36 | J. O. Combs Unified School District / 15,014 |
| 108. | 3.34 | San Simon Unified District / 643 |
| 109. | 3.33 | Clarkdale-Jerome Elementary District / 3,300 |
| 110. | 3.32 | Name N/A / 4,024 |
| 111. | 3.32 | Kyrene Elementary District / 163,023 |
| 112. | 3.31 | Paradise Valley Unified District / 252,534 |
| 113. | 3.30 | Thatcher Unified District / 6,990 |
| 114. | 3.30 | Humboldt Unified District / 49,164 |
| 115. | 3.28 | Valentine Elementary District / 194 |
| 115. | 3.28 | Pomerene Elementary District / 958 |
| 117. | 3.28 | Hyder Elementary District / 473 |
| 118. | 3.28 | Beaver Creek Elementary District / 4,146 |
| 119. | 3.27 | Name N/A / 3,945 |
| 120. | 3.27 | Mohawk Valley Elementary District / 1,309 |
| 121. | 3.26 | Ash Fork Joint Unified District / 1,086 |
| 122. | 3.26 | Flagstaff Unified District / 87,017 |
| 123. | 3.26 | Name N/A / 2,268 |
| 124. | 3.26 | Madison Elementary District / 60,155 |
| 125. | 3.26 | Concho Elementary District / 1,768 |
| 126. | 3.25 | Chino Valley Unified District / 20,025 |
| 127. | 3.25 | Yucca Elementary District / 306 |
| 128. | 3.24 | Safford Unified District / 15,374 |
| 129. | 3.24 | Florence Unified School District / 49,644 |
| 130. | 3.24 | Globe Unified District / 10,795 |
| 131. | 3.23 | Double Adobe Elementary District / 556 |
| 132. | 3.22 | Tanque Verde Unified District / 12,340 |
| 133. | 3.21 | Casa Grande Union High School District / 69,070 |
| 134. | 3.19 | Skull Valley Elementary District / 335 |
| 135. | 3.19 | Maricopa Unified School District / 37,856 |
| 136. | 3.18 | Blue Ridge Unified District / 16,494 |
| 137. | 3.17 | Owens-Whitney Elementary District / 579 |
| 138. | 3.16 | Mayer Unified District / 5,928 |
| 139. | 3.16 | Crane Elementary District / 41,602 |
| 140. | 3.15 | Kingman Unified School District / 63,015 |
| 141. | 3.14 | Vernon Elementary District / 1,168 |
| 142. | 3.14 | Picacho Elementary District / 4,377 |
| 143. | 3.13 | Duncan Unified District / 2,592 |
| 144. | 3.13 | Casa Grande Elementary District / 50,822 |
| 145. | 3.12 | Name N/A / 1,945 |
| 146. | 3.12 | Mingus Union High School District / 33,190 |
| 147. | 3.11 | Fredonia-Moccasin Unified District / 2,093 |
| 148. | 3.10 | Amphitheater Unified District / 140,997 |
| 149. | 3.10 | Cottonwood-Oak Creek Elementary District / 29,890 |
| 150. | 3.08 | Ajo Unified District / 3,253 |
| 151. | 3.08 | Show Low Unified District / 15,872 |
| 152. | 3.07 | Redington Elementary District / 89 |
| 153. | 3.07 | Valley Union High School District / 4,488 |
| 154. | 3.07 | Yuma Union High School District / 183,380 |
| 155. | 3.06 | Bullhead City School District / 40,541 |
| 156. | 3.06 | Scottsdale Unified District / 240,032 |
| 157. | 3.05 | Tombstone Unified District / 6,578 |
| 158. | 3.05 | Mammoth-San Manuel Unified District / 6,807 |
| 159. | 3.05 | Colorado River Union High School District / 62,309 |
| 160. | 3.04 | Ash Creek Elementary District / 1,109 |
| 161. | 3.04 | Willcox Unified District / 7,579 |
| 162. | 3.04 | Mohave Valley Elementary District / 19,429 |
| 163. | 3.03 | Toltec Elementary District / 6,837 |
| 164. | 3.03 | Williams Unified District / 5,186 |
| 165. | 3.02 | Hackberry School District / 866 |
| 166. | 2.99 | Red Rock Elementary District / 974 |
| 167. | 2.99 | Clifton Unified District / 1,899 |
| 168. | 2.98 | Young Elementary School District / 462 |
| 169. | 2.98 | Bisbee Unified District / 7,595 |
| 170. | 2.98 | Sierra Vista Unified District / 47,982 |
| 171. | 2.97 | Payson Unified District / 20,548 |
| 172. | 2.94 | Name N/A / 11,927 |
| 173. | 2.93 | Patagonia Elementary District / 892 |
| 174. | 2.93 | Catalina Foothills Unified District / 34,025 |
| 175. | 2.92 | Lake Havasu Unified District / 57,801 |
| 176. | 2.90 | Canon Elementary District / 2,668 |
| 177. | 2.87 | Hillside Elementary District / 71 |
| 178. | 2.87 | Topock Elementary District / 2,339 |
| 179. | 2.86 | Benson Unified School District / 7,265 |
| 180. | 2.86 | Heber-Overgaard Unified District / 3,392 |
| 181. | 2.86 | McNeal Elementary District / 307 |
| 182. | 2.86 | Ray Unified District / 5,200 |
| 183. | 2.86 | Wenden Elementary District / 531 |
| 184. | 2.86 | Yuma Elementary District / 102,481 |
| 185. | 2.85 | Bonita Elementary District / 1,196 |
| 186. | 2.84 | Pearce Elementary District / 2,151 |
| 187. | 2.84 | Cave Creek Unified District / 51,353 |
| 188. | 2.83 | Morristown Elementary District / 1,320 |
| 189. | 2.78 | Superior Unified School District / 3,596 |
| 190. | 2.76 | Antelope Union High School District / 5,603 |
| 191. | 2.76 | Bowie Unified District / 474 |
| 192. | 2.76 | Congress Elementary District / 1,928 |
| 193. | 2.76 | Parker Unified School District / 12,143 |
| 194. | 2.74 | Prescott Unified District / 58,322 |
| 195. | 2.74 | Kirkland Elementary District / 862 |
| 196. | 2.73 | Fountain Hills Unified District / 25,193 |
| 197. | 2.70 | Yarnell Elementary District / 1,119 |
| 198. | 2.65 | Williamson Valley Elementary School District / 723 |
| 199. | 2.64 | Apache Junction Unified District / 54,316 |
| 200. | 2.63 | Sedona-Oak Creek Joint Unified District / 15,720 |
| 201. | 2.62 | Patagonia Union High School District / 2,036 |
| 202. | 2.60 | Name N/A / 3,658 |
| 203. | 2.60 | Salome Consolidated Elementary District / 1,328 |
| 204. | 2.59 | Wellton Elementary District / 3,821 |
| 205. | 2.58 | San Fernando Elementary District / 34 |
| 206. | 2.57 | Grand Canyon Unified District / 1,775 |
| 207. | 2.57 | Pine Strawberry Elementary District / 2,525 |
| 208. | 2.57 | Cochise Elementary District / 372 |
| 209. | 2.56 | Maine Consolidated School District / 937 |
| 210. | 2.56 | Wickenburg Unified District / 8,749 |
| 211. | 2.53 | Name N/A / 440 |
| 212. | 2.52 | Name N/A / 1,425 |
| 213. | 2.47 | Tonto Basin Elementary District / 671 |
| 214. | 2.45 | Seligman Unified District / 636 |
| 215. | 2.45 | Sonoita Elementary District / 1,144 |
| 216. | 2.45 | Name N/A / 63,745 |
| 217. | 2.45 | Bouse Elementary District / 1,182 |
| 218. | 2.44 | Chevelon Butte School District / 488 |
| 219. | 2.39 | Name N/A / 30,173 |
| 220. | 2.34 | Bicentennial Union High School District / 7,912 |
| 221. | 2.32 | Alpine Elementary District / 460 |
| 222. | 2.24 | Oracle Elementary District / 11,507 |
| 222. | 2.24 | Name N/A / 11,507 |
| 224. | 2.24 | Apache Elementary District / 60 |
| 225. | 2.22 | Quartzsite Elementary District / 4,871 |
| 226. | 2.14 | Crown King Elementary District / 19 |
| 227. | 2.13 | Continental Elementary District / 23,360 |
| 228. | 2.13 | Walnut Grove Elementary District / 39 |
| 229. | 1.88 | Name N/A / 20 |
| 229. | 1.88 | Eagle Elementary District / 15 |
| 231. | 1.71 | Name N/A / 17 |
| 232. | 1.67 | Rucker Elementary District / 5 |
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.
