| Rank | Average Family Size ▼ | School District / Population |
| 1. | 3.88 | Woodburn School District 103 / 27,277 |
| 2. | 3.83 | Suntex School District 10 / 107 |
| 3. | 3.83 | Gervais School District 1 / 7,697 |
| 4. | 3.72 | Umatilla School District 6 / 5,975 |
| 5. | 3.68 | Morrow School District 1 / 10,586 |
| 6. | 3.68 | Echo School District 5 / 918 |
| 7. | 3.67 | Nyssa School District 26 / 5,135 |
| 8. | 3.66 | David Douglas School District 40 / 66,173 |
| 9. | 3.64 | Dayton School District 8 / 6,121 |
| 10. | 3.64 | Pine Creek School District 5 / 83 |
| 11. | 3.63 | Diamond School District 7 / 101 |
| 12. | 3.59 | Jefferson County School District 509J / 16,035 |
| 13. | 3.56 | Camas Valley School District 21J / 802 |
| 14. | 3.54 | St. Paul School District 45 / 1,404 |
| 15. | 3.49 | Hillsboro School District 1J / 129,769 |
| 16. | 3.48 | Annex School District 29 / 482 |
| 17. | 3.48 | Monroe School District 1J / 3,460 |
| 18. | 3.48 | Centennial School District 28J / 41,180 |
| 19. | 3.46 | Parkrose School District 3 / 26,781 |
| 20. | 3.46 | Forest Grove School District 15 / 34,942 |
| 21. | 3.45 | Hermiston School District 8 / 27,183 |
| 22. | 3.45 | Reynolds School District 7 / 75,406 |
| 23. | 3.43 | North Marion School District 15 / 10,076 |
| 24. | 3.43 | Harrisburg School District 7J / 5,258 |
| 25. | 3.42 | Silver Falls School District 4J / 19,876 |
| 26. | 3.41 | Milton-Freewater School District 7 / 11,973 |
| 27. | 3.41 | Colton School District 53 / 4,403 |
| 28. | 3.41 | Amity School District 4J / 4,551 |
| 29. | 3.39 | Vale School District 84 / 4,903 |
| 30. | 3.38 | McMinnville School District 40 / 40,061 |
| 31. | 3.38 | Estacada School District 108 / 13,620 |
| 32. | 3.36 | Wallowa School District 12 / 1,879 |
| 33. | 3.35 | Gresham-Barlow School District 1J / 76,766 |
| 34. | 3.35 | North Powder School District 8J / 903 |
| 35. | 3.35 | Corbett School District 39 / 4,266 |
| 36. | 3.34 | Powers School District 31 / 1,040 |
| 37. | 3.34 | Riverdale School District 51J / 2,683 |
| 38. | 3.33 | Stanfield School District 61 / 2,700 |
| 39. | 3.33 | Central School District 13J / 21,786 |
| 40. | 3.32 | Salem-Keizer School District 24J / 245,673 |
| 41. | 3.31 | Newberg School District 29J / 34,787 |
| 42. | 3.31 | Canby School District 86 / 30,466 |
| 43. | 3.31 | Molalla River School District 35 / 20,532 |
| 44. | 3.31 | Banks School District 13 / 6,489 |
| 45. | 3.30 | Hood River County School District 1 / 22,620 |
| 46. | 3.30 | Marcola School District 79J / 2,029 |
| 47. | 3.28 | Ontario School District 8 / 17,865 |
| 48. | 3.28 | Pinehurst School District 94 / 227 |
| 49. | 3.28 | Yamhill-Carlton School District 1 / 6,678 |
| 50. | 3.27 | Eagle Point School District 9 / 27,558 |
| 51. | 3.27 | Coquille School District 8 / 7,196 |
| 52. | 3.27 | Pendleton School District 16 / 22,224 |
| 53. | 3.27 | Mount Angel School District 91 / 3,894 |
| 54. | 3.26 | Beaverton School District 48J / 264,366 |
| 55. | 3.25 | Central Linn School District 552 / 5,328 |
| 56. | 3.24 | Sutherlin School District 130 / 9,695 |
| 57. | 3.24 | Pilot Rock School District 2 / 2,180 |
| 58. | 3.24 | St. Helens School District 502 / 20,169 |
| 59. | 3.23 | Sherwood School District 88J / 30,038 |
| 60. | 3.23 | Jefferson School District 14J / 6,782 |
| 61. | 3.23 | Tillamook School District 9 / 13,584 |
| 62. | 3.23 | Bethel School District 52 / 38,809 |
| 63. | 3.23 | Ione School District 2 / 639 |
| 64. | 3.22 | Sweet Home School District 55 / 14,797 |
| 65. | 3.22 | Greater Albany School District 8J / 62,421 |
| 66. | 3.22 | Springfield School District 19 / 74,794 |
| 67. | 3.20 | North Douglas School District 22 / 2,600 |
| 68. | 3.20 | North Clackamas School District 12 / 116,845 |
| 69. | 3.19 | Grants Pass School District 7 / 36,597 |
| 70. | 3.18 | Jordan Valley School District 3 / 469 |
| 71. | 3.18 | Sheridan School District 48J / 7,055 |
| 72. | 3.18 | Scio School District 95 / 4,618 |
| 73. | 3.18 | Coos Bay School District 9 / 26,254 |
| 74. | 3.17 | North Santiam School District 29J / 15,435 |
| 75. | 3.17 | Butte Falls School District 91 / 1,150 |
| 76. | 3.17 | Vernonia School District 47J / 3,709 |
| 77. | 3.17 | Medford School District 549 / 86,642 |
| 78. | 3.17 | Willamina School District 30J / 5,540 |
| 79. | 3.16 | Creswell School District 40 / 8,962 |
| 80. | 3.16 | West Linn School District 3J / 47,012 |
| 81. | 3.15 | Clatskanie School District 6J / 5,410 |
| 82. | 3.15 | Gladstone School District 115 / 11,556 |
| 83. | 3.15 | Ashwood School District 8 / 135 |
| 84. | 3.15 | Lebanon Community School District 9 / 28,241 |
| 85. | 3.14 | Oregon City School District 62 / 54,859 |
| 86. | 3.14 | Central Curry School District 1 / 5,405 |
| 87. | 3.13 | Long Creek School District 17 / 417 |
| 88. | 3.13 | Prairie City School District 4 / 1,259 |
| 89. | 3.12 | Redmond School District 2J / 46,775 |
| 90. | 3.11 | Central Point School District 6 / 30,647 |
| 91. | 3.11 | Dallas School District 2 / 20,422 |
| 92. | 3.11 | Athena-Weston School District 29J / 2,799 |
| 93. | 3.10 | Union School District 5 / 2,266 |
| 94. | 3.09 | Cascade School District 5 / 13,792 |
| 95. | 3.09 | Gaston School District 511J / 2,995 |
| 96. | 3.09 | Philomath School District 17J / 8,464 |
| 97. | 3.08 | Scappoose School District 1J / 14,580 |
| 98. | 3.08 | South Umpqua School District 19 / 12,196 |
| 99. | 3.08 | Warrenton-Hammond School District 30 / 6,193 |
| 100. | 3.07 | Enterprise School District 21 / 2,891 |
| 101. | 3.07 | North Bend School District 13 / 16,122 |
| 102. | 3.07 | Dufur School District 29 / 1,386 |
| 103. | 3.07 | La Grande School District 1 / 16,920 |
| 104. | 3.07 | South Lane School District 45J / 18,618 |
| 105. | 3.06 | North Wasco School District 21 / 20,723 |
| 106. | 3.06 | Fern Ridge School District 28J / 11,448 |
| 107. | 3.06 | Culver School District 4 / 3,852 |
| 108. | 3.05 | Winston-Dillard School District 116 / 9,676 |
| 109. | 3.05 | Elgin School District 23 / 2,558 |
| 110. | 3.05 | Helix School District 1 / 467 |
| 111. | 3.05 | Cove School District 15 / 1,838 |
| 112. | 3.04 | Tigard-Tualatin School District 23J / 79,788 |
| 113. | 3.03 | Portland School District 1J / 475,838 |
| 114. | 3.03 | Rainier School District 13 / 7,445 |
| 115. | 3.02 | Falls City School District 57 / 1,216 |
| 116. | 3.02 | Bend-La Pine Administrative School District 1 / 110,491 |
| 117. | 3.01 | Corvallis School District 509J / 65,503 |
| 118. | 3.01 | Phoenix-Talent School District 4 / 24,791 |
| 119. | 3.00 | Arlington School District 3 / 798 |
| 120. | 3.00 | Seaside School District 10 / 12,214 |
| 121. | 3.00 | Junction City School District 69 / 12,857 |
| 122. | 2.99 | Astoria School District 1 / 13,820 |
| 123. | 2.98 | Lake Oswego School District 7J / 40,866 |
| 124. | 2.98 | Perrydale School District 21 / 895 |
| 125. | 2.98 | Harney County School District 4 / 908 |
| 126. | 2.97 | Prospect School District 59 / 1,044 |
| 127. | 2.97 | Roseburg School District 4 / 47,611 |
| 128. | 2.96 | Klamath Falls City Schools / 23,121 |
| 129. | 2.96 | Oregon Trail School District 46 / 28,409 |
| 130. | 2.95 | Myrtle Point School District 41 / 4,570 |
| 131. | 2.95 | Harney County Union High School District 1J / 1,664 |
| 132. | 2.95 | Klamath County School District / 42,864 |
| 133. | 2.95 | Lowell School District 71 / 2,643 |
| 134. | 2.95 | Eugene School District 4J / 152,154 |
| 135. | 2.94 | Sherman School District 1 / 1,790 |
| 136. | 2.94 | Glide School District 12 / 5,810 |
| 137. | 2.94 | Santiam Canyon School District 129J / 4,043 |
| 138. | 2.94 | Pleasant Hill School District 1 / 6,554 |
| 139. | 2.93 | Fossil School District 21J / 834 |
| 140. | 2.92 | Three Rivers School District / 47,349 |
| 141. | 2.92 | Name N/A / 1,772 |
| 142. | 2.92 | Arock School District 81 / 120 |
| 143. | 2.91 | Monument School District 8 / 436 |
| 144. | 2.91 | Yoncalla School District 32 / 2,656 |
| 145. | 2.91 | Sisters School District 6 / 8,149 |
| 146. | 2.90 | Crook County School District / 20,856 |
| 147. | 2.89 | Blachly School District 090 / 564 |
| 148. | 2.89 | Adrian School District 61 / 1,195 |
| 149. | 2.88 | Knappa School District 4 / 3,322 |
| 150. | 2.87 | Riddle School District 70 / 2,567 |
| 151. | 2.87 | Alsea School District 7J / 1,084 |
| 152. | 2.87 | Neah-Kah-Nie School District 56 / 7,443 |
| 153. | 2.86 | McKenzie School District 68 / 2,410 |
| 154. | 2.86 | Ashland School District 5 / 24,494 |
| 155. | 2.86 | Troy School District 54 / 51 |
| 156. | 2.83 | Frenchglen School District 16 / 122 |
| 157. | 2.83 | Imbler School District 11 / 1,364 |
| 158. | 2.81 | Huntington School District 16J / 435 |
| 159. | 2.81 | Oakland School District 1 / 2,675 |
| 160. | 2.80 | Black Butte School District 41 / 432 |
| 161. | 2.79 | Lincoln County School District / 46,338 |
| 162. | 2.79 | Bandon School District 54 / 7,227 |
| 163. | 2.78 | Reedsport School District 105 / 5,507 |
| 164. | 2.78 | Nestucca Valley School District 101J / 4,307 |
| 165. | 2.77 | John Day School District 3 / 4,803 |
| 166. | 2.76 | Elkton School District 34 / 1,424 |
| 167. | 2.76 | Harney County School District 3 / 5,589 |
| 168. | 2.75 | Burnt River School District 30J / 395 |
| 169. | 2.75 | Jewell School District 8 / 931 |
| 170. | 2.75 | Baker School District 5J / 13,694 |
| 171. | 2.74 | Days Creek School District 15 / 1,232 |
| 172. | 2.74 | Condon School District 25J / 1,120 |
| 173. | 2.73 | Rogue River School District 35 / 9,105 |
| 174. | 2.73 | Lakeview School District 7 / 5,511 |
| 175. | 2.72 | Dayville School District 16J / 410 |
| 176. | 2.72 | North Lake School District 14 / 1,654 |
| 177. | 2.70 | Crow-Applegate-Lorane Sd 66 / 2,137 |
| 178. | 2.69 | Port Orford-Langlois School District 2J / 3,485 |
| 179. | 2.68 | South Wasco County School District 1 / 2,142 |
| 180. | 2.65 | Mitchell School District 55 / 389 |
| 181. | 2.64 | Brookings-Harbor School District 17 / 13,720 |
| 182. | 2.62 | Oakridge School District 76 / 4,396 |
| 183. | 2.59 | Siuslaw School District 97J / 14,479 |
| 184. | 2.59 | Mapleton School District 32 / 1,456 |
| 185. | 2.57 | South Harney School District 33 / 177 |
| 186. | 2.53 | Joseph School District 6 / 2,072 |
| 187. | 2.50 | Juntura School District 12 / 108 |
| 187. | 2.50 | Ukiah School District 80 / 226 |
| 189. | 2.49 | Harper School District 66 / 324 |
| 190. | 2.47 | Glendale School District 77 / 2,665 |
| 191. | 2.44 | Pine-Eagle School District 61 / 1,473 |
| 192. | 2.43 | Paisley School District 11 / 531 |
| 193. | 2.39 | Spray School District 1 / 314 |
| 194. | 2.39 | Drewsey School District 13 / 141 |
| 195. | 2.37 | McDermitt School District 51 / 78 |
| 196. | 2.36 | Adel School District 21 / 90 |
| 197. | 2.20 | Double O School District 28 / 25 |
| 198. | 2.18 | Plush School District 18 / 68 |
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.
