| Rank | Average Family Size ▼ | School District / Population |
| 1. | 4.43 | Fremont County School District 14 / 2,344 |
| 2. | 4.31 | Fremont County School District 38 / 1,631 |
| 3. | 3.84 | Fremont County School District 21 / 2,190 |
| 4. | 3.29 | Uinta County School District 6 / 3,248 |
| 5. | 3.24 | Big Horn County School District 1 / 3,085 |
| 6. | 3.20 | Uinta County School District 1 / 14,618 |
| 7. | 3.17 | Big Horn County School District 2 / 3,430 |
| 8. | 3.15 | Lincoln County School District 2 / 13,408 |
| 9. | 3.11 | Campbell County School District 1 / 46,133 |
| 9. | 3.11 | Sweetwater County School District 2 / 13,657 |
| 11. | 3.10 | Uinta County School District 4 / 3,252 |
| 12. | 3.09 | Sweetwater County School District 1 / 30,043 |
| 13. | 3.07 | Sublette County School District 9 / 4,119 |
| 14. | 3.02 | Laramie County School District 2 / 5,540 |
| 14. | 3.02 | Fremont County School District 25 / 16,987 |
| 16. | 3.01 | Carbon County School District 1 / 11,195 |
| 17. | 3.00 | Fremont County School District 6 / 2,198 |
| 18. | 2.98 | Lincoln County School District 1 / 3,894 |
| 19. | 2.96 | Sublette County School District 1 / 6,932 |
| 19. | 2.96 | Washakie County School District 1 / 7,801 |
| 21. | 2.94 | Natrona County School District 1 / 75,450 |
| 21. | 2.94 | Laramie County School District 1 / 86,198 |
| 23. | 2.93 | Converse County School District 2 / 4,276 |
| 23. | 2.93 | Converse County School District 1 / 9,557 |
| 25. | 2.91 | Big Horn County School District 3 / 3,029 |
| 26. | 2.90 | Crook County School District 1 / 7,083 |
| 27. | 2.89 | Teton County School District 1 / 21,294 |
| 28. | 2.88 | Park County School District 1 / 11,915 |
| 29. | 2.86 | Sheridan County School District 1 / 4,623 |
| 30. | 2.84 | Sheridan County School District 2 / 24,064 |
| 30. | 2.84 | Albany County School District 1 / 36,299 |
| 32. | 2.83 | Fremont County School District 24 / 1,545 |
| 32. | 2.83 | Johnson County School District 1 / 8,569 |
| 32. | 2.83 | Weston County School District 7 / 1,521 |
| 35. | 2.82 | Goshen County School District 1 / 13,164 |
| 35. | 2.82 | Fremont County School District 1 / 11,330 |
| 37. | 2.80 | Big Horn County School District 4 / 2,244 |
| 37. | 2.80 | Weston County School District 1 / 5,687 |
| 39. | 2.78 | Sheridan County School District 3 / 429 |
| 40. | 2.76 | Platte County School District 1 / 7,251 |
| 40. | 2.76 | Platte County School District 2 / 1,465 |
| 42. | 2.75 | Park County School District 6 / 15,093 |
| 43. | 2.71 | Carbon County School District 2 / 4,796 |
| 43. | 2.71 | Niobrara County School District 1 / 2,520 |
| 43. | 2.71 | Park County School District 16 / 789 |
| 46. | 2.70 | Hot Springs County School District 1 / 4,812 |
| 47. | 2.65 | Washakie County School District 2 / 732 |
| 48. | 2.58 | Fremont County School District 2 / 1,898 |
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.
