| Rank | Average Family Size ▼ | School District / Population |
| 1. | 5.00 | Suntex School District 10 / 70 |
| 2. | 3.98 | Woodburn School District 103 / 26,972 |
| 3. | 3.90 | Gervais School District 1 / 7,116 |
| 4. | 3.78 | Umatilla School District 6 / 6,397 |
| 5. | 3.67 | South Harney School District 33 / 363 |
| 6. | 3.65 | Colton School District 53 / 4,676 |
| 7. | 3.65 | St. Paul School District 45 / 1,376 |
| 8. | 3.58 | Morrow School District 1 / 10,541 |
| 9. | 3.57 | Echo School District 5 / 975 |
| 10. | 3.56 | Dayton School District 8 / 5,627 |
| 11. | 3.52 | David Douglas School District 40 / 62,538 |
| 12. | 3.50 | Centennial School District 28J / 41,767 |
| 13. | 3.49 | Central School District 13J / 21,376 |
| 14. | 3.49 | Hillsboro School District 1J / 127,567 |
| 15. | 3.48 | Camas Valley School District 21J / 824 |
| 16. | 3.47 | Falls City School District 57 / 1,411 |
| 17. | 3.46 | North Powder School District 8J / 902 |
| 18. | 3.45 | Nyssa School District 26 / 5,067 |
| 19. | 3.45 | Central Linn School District 552 / 5,347 |
| 20. | 3.44 | Jefferson County School District 509J / 15,943 |
| 21. | 3.44 | Reynolds School District 7 / 73,329 |
| 22. | 3.43 | Santiam Canyon School District 129J / 4,157 |
| 23. | 3.42 | Ontario School District 8 / 18,665 |
| 24. | 3.41 | Helix School District 1 / 482 |
| 25. | 3.41 | Forest Grove School District 15 / 33,076 |
| 26. | 3.40 | Wallowa School District 12 / 2,021 |
| 27. | 3.40 | Parkrose School District 3 / 27,076 |
| 28. | 3.39 | Silver Falls School District 4J / 19,318 |
| 29. | 3.39 | Harney County School District 4 / 903 |
| 30. | 3.39 | North Marion School District 15 / 9,651 |
| 31. | 3.38 | Harney County Union High School District 1J / 1,795 |
| 32. | 3.37 | Name N/A / 1,879 |
| 33. | 3.36 | Stanfield School District 61 / 2,575 |
| 34. | 3.36 | Estacada School District 108 / 13,364 |
| 35. | 3.34 | Hermiston School District 8 / 26,777 |
| 36. | 3.34 | Powers School District 31 / 1,115 |
| 37. | 3.33 | Gresham-Barlow School District 1J / 74,621 |
| 38. | 3.33 | McMinnville School District 40 / 39,642 |
| 39. | 3.31 | Milton-Freewater School District 7 / 11,850 |
| 40. | 3.31 | Vale School District 84 / 4,599 |
| 41. | 3.30 | Corbett School District 39 / 4,127 |
| 42. | 3.30 | Sherwood School District 88J / 28,626 |
| 43. | 3.30 | Annex School District 29 / 434 |
| 44. | 3.29 | Newberg School District 29J / 34,527 |
| 45. | 3.29 | Hood River County School District 1 / 22,207 |
| 46. | 3.28 | Sheridan School District 48J / 7,263 |
| 47. | 3.27 | Pilot Rock School District 2 / 2,110 |
| 48. | 3.27 | Salem-Keizer School District 24J / 242,005 |
| 49. | 3.26 | Canby School District 86 / 30,231 |
| 50. | 3.26 | Pendleton School District 16 / 21,909 |
| 51. | 3.25 | Mount Angel School District 91 / 3,964 |
| 52. | 3.25 | South Umpqua School District 19 / 12,283 |
| 53. | 3.24 | Molalla River School District 35 / 19,766 |
| 54. | 3.24 | St. Helens School District 502 / 20,262 |
| 55. | 3.23 | Lebanon Community School District 9 / 28,712 |
| 56. | 3.22 | Bethel School District 52 / 38,284 |
| 57. | 3.22 | Riverdale School District 51J / 2,348 |
| 58. | 3.21 | North Clackamas School District 12 / 114,754 |
| 59. | 3.21 | Gaston School District 511J / 3,241 |
| 60. | 3.21 | Diamond School District 7 / 142 |
| 61. | 3.21 | Monroe School District 1J / 3,290 |
| 62. | 3.20 | Jordan Valley School District 3 / 510 |
| 63. | 3.19 | Beaverton School District 48J / 256,471 |
| 64. | 3.19 | Jefferson School District 14J / 6,654 |
| 65. | 3.18 | North Douglas School District 22 / 2,582 |
| 66. | 3.18 | Greater Albany School District 8J / 60,806 |
| 67. | 3.17 | Marcola School District 79J / 1,966 |
| 68. | 3.16 | Ione School District 2 / 615 |
| 69. | 3.16 | Cascade School District 5 / 13,965 |
| 70. | 3.16 | Winston-Dillard School District 116 / 10,006 |
| 71. | 3.14 | West Linn School District 3J / 46,142 |
| 72. | 3.14 | Dallas School District 2 / 20,220 |
| 73. | 3.14 | North Santiam School District 29J / 15,710 |
| 74. | 3.13 | Culver School District 4 / 3,815 |
| 75. | 3.13 | Oregon City School District 62 / 54,284 |
| 76. | 3.13 | Coos Bay School District 9 / 27,600 |
| 77. | 3.13 | Scio School District 95 / 3,913 |
| 78. | 3.12 | Springfield School District 19 / 74,450 |
| 79. | 3.12 | Eagle Point School District 9 / 25,304 |
| 80. | 3.12 | Arlington School District 3 / 835 |
| 81. | 3.11 | Banks School District 13 / 6,144 |
| 82. | 3.11 | Amity School District 4J / 4,481 |
| 83. | 3.11 | Medford School District 549 / 86,284 |
| 84. | 3.11 | Harrisburg School District 7J / 5,634 |
| 85. | 3.11 | Vernonia School District 47J / 3,880 |
| 86. | 3.10 | Adrian School District 61 / 1,151 |
| 87. | 3.10 | Sherman School District 1 / 1,865 |
| 88. | 3.10 | Gladstone School District 115 / 11,168 |
| 89. | 3.10 | Creswell School District 40 / 8,813 |
| 90. | 3.09 | Tigard-Tualatin School District 23J / 77,482 |
| 91. | 3.09 | Yamhill-Carlton School District 1 / 6,478 |
| 92. | 3.08 | Philomath School District 17J / 8,613 |
| 93. | 3.08 | Pinehurst School District 94 / 278 |
| 94. | 3.08 | Fern Ridge School District 28J / 11,283 |
| 95. | 3.07 | Sutherlin School District 130 / 9,483 |
| 96. | 3.07 | Grants Pass School District 7 / 36,196 |
| 97. | 3.06 | Union School District 5 / 2,440 |
| 98. | 3.06 | Willamina School District 30J / 5,407 |
| 99. | 3.05 | Pine Creek School District 5 / 62 |
| 100. | 3.05 | Juntura School District 12 / 84 |
| 101. | 3.05 | Jewell School District 8 / 1,006 |
| 102. | 3.04 | Cove School District 15 / 1,893 |
| 103. | 3.04 | Rainier School District 13 / 7,741 |
| 104. | 3.04 | Portland School District 1J / 462,367 |
| 105. | 3.04 | Sweet Home School District 55 / 14,475 |
| 106. | 3.03 | Scappoose School District 1J / 14,423 |
| 107. | 3.01 | Enterprise School District 21 / 2,846 |
| 108. | 3.01 | Harper School District 66 / 244 |
| 109. | 3.01 | South Lane School District 45J / 17,989 |
| 110. | 3.01 | Coquille School District 8 / 7,231 |
| 111. | 3.00 | Corvallis School District 509J / 65,211 |
| 112. | 3.00 | Central Point School District 6 / 29,102 |
| 113. | 3.00 | Seaside School District 10 / 12,001 |
| 114. | 2.99 | Clatskanie School District 6J / 5,230 |
| 115. | 2.99 | Oakland School District 1 / 3,027 |
| 116. | 2.98 | Redmond School District 2J / 44,979 |
| 117. | 2.98 | Tillamook School District 9 / 13,690 |
| 118. | 2.97 | Perrydale School District 21 / 1,043 |
| 119. | 2.97 | Sisters School District 6 / 8,134 |
| 120. | 2.97 | La Grande School District 1 / 16,764 |
| 121. | 2.97 | Roseburg School District 4 / 47,705 |
| 122. | 2.97 | Junction City School District 69 / 12,652 |
| 123. | 2.96 | Lake Oswego School District 7J / 40,644 |
| 124. | 2.96 | Bend-La Pine Administrative School District 1 / 107,982 |
| 125. | 2.96 | Pleasant Hill School District 1 / 6,628 |
| 126. | 2.95 | Oregon Trail School District 46 / 26,509 |
| 127. | 2.95 | Warrenton-Hammond School District 30 / 6,163 |
| 128. | 2.95 | Astoria School District 1 / 14,011 |
| 129. | 2.95 | Frenchglen School District 16 / 136 |
| 130. | 2.95 | Three Rivers School District / 47,321 |
| 131. | 2.94 | Blachly School District 090 / 618 |
| 132. | 2.94 | Alsea School District 7J / 1,098 |
| 133. | 2.93 | Klamath Falls City Schools / 23,334 |
| 134. | 2.92 | North Bend School District 13 / 15,938 |
| 135. | 2.92 | Eugene School District 4J / 150,282 |
| 136. | 2.91 | Ashwood School District 8 / 132 |
| 137. | 2.91 | Lowell School District 71 / 2,483 |
| 138. | 2.91 | Crook County School District / 21,189 |
| 139. | 2.90 | Phoenix-Talent School District 4 / 25,037 |
| 140. | 2.90 | Mitchell School District 55 / 375 |
| 141. | 2.89 | Klamath County School District / 43,016 |
| 142. | 2.89 | Reedsport School District 105 / 5,586 |
| 143. | 2.89 | Central Curry School District 1 / 5,440 |
| 144. | 2.88 | Huntington School District 16J / 532 |
| 145. | 2.88 | Yoncalla School District 32 / 2,705 |
| 146. | 2.88 | Elgin School District 23 / 2,306 |
| 147. | 2.87 | Elkton School District 34 / 1,427 |
| 148. | 2.87 | Rogue River School District 35 / 10,290 |
| 149. | 2.86 | Myrtle Point School District 41 / 4,609 |
| 150. | 2.86 | Imbler School District 11 / 1,544 |
| 151. | 2.86 | Knappa School District 4 / 3,028 |
| 152. | 2.85 | Glide School District 12 / 5,399 |
| 153. | 2.85 | Nestucca Valley School District 101J / 4,380 |
| 154. | 2.85 | Athena-Weston School District 29J / 2,617 |
| 155. | 2.85 | Butte Falls School District 91 / 1,138 |
| 156. | 2.85 | Glendale School District 77 / 2,844 |
| 157. | 2.85 | North Wasco School District 21 / 21,139 |
| 158. | 2.83 | Prairie City School District 4 / 1,288 |
| 159. | 2.83 | Drewsey School District 13 / 110 |
| 160. | 2.82 | Arock School District 81 / 149 |
| 161. | 2.81 | Ashland School District 5 / 24,278 |
| 162. | 2.80 | Monument School District 8 / 491 |
| 163. | 2.78 | Days Creek School District 15 / 1,162 |
| 164. | 2.78 | Prospect School District 59 / 1,021 |
| 165. | 2.78 | Lincoln County School District / 46,231 |
| 166. | 2.77 | Riddle School District 70 / 2,321 |
| 167. | 2.75 | Plush School District 18 / 113 |
| 168. | 2.75 | Joseph School District 6 / 2,022 |
| 169. | 2.74 | Black Butte School District 41 / 362 |
| 170. | 2.73 | McKenzie School District 68 / 2,213 |
| 171. | 2.71 | Oakridge School District 76 / 4,503 |
| 172. | 2.70 | Baker School District 5J / 13,641 |
| 173. | 2.69 | Fossil School District 21J / 671 |
| 174. | 2.69 | Siuslaw School District 97J / 15,133 |
| 175. | 2.68 | Port Orford-Langlois School District 2J / 3,620 |
| 176. | 2.68 | North Lake School District 14 / 1,703 |
| 177. | 2.67 | Brookings-Harbor School District 17 / 13,530 |
| 178. | 2.65 | Harney County School District 3 / 5,564 |
| 179. | 2.64 | Lakeview School District 7 / 5,397 |
| 180. | 2.64 | Crow-Applegate-Lorane Sd 66 / 2,301 |
| 181. | 2.64 | Mapleton School District 32 / 1,318 |
| 182. | 2.63 | John Day School District 3 / 4,760 |
| 183. | 2.63 | Dufur School District 29 / 1,178 |
| 184. | 2.62 | Long Creek School District 17 / 446 |
| 185. | 2.60 | Neah-Kah-Nie School District 56 / 7,184 |
| 186. | 2.57 | Spray School District 1 / 397 |
| 187. | 2.56 | Condon School District 25J / 1,059 |
| 188. | 2.55 | McDermitt School District 51 / 82 |
| 189. | 2.54 | Paisley School District 11 / 618 |
| 190. | 2.51 | Bandon School District 54 / 6,198 |
| 191. | 2.43 | Troy School District 54 / 49 |
| 192. | 2.43 | Dayville School District 16J / 381 |
| 193. | 2.41 | Pine-Eagle School District 61 / 1,497 |
| 194. | 2.36 | South Wasco County School District 1 / 1,836 |
| 195. | 2.31 | Ukiah School District 80 / 154 |
| 196. | 2.14 | Burnt River School District 30J / 315 |
| 197. | 1.83 | Adel School District 21 / 55 |
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.
