| Rank | Median Age ▲ | School District / Population |
| 1. | 21.30 | Castine / 1,673 |
| 2. | 23.70 | Regional School Unit 26 / 17,096 |
| 3. | 23.90 | Kennebec Unorganized Territory / 80 |
| 4. | 24.80 | Frenchboro / 73 |
| 5. | 26.00 | Indian Township / 841 |
| 6. | 27.60 | Pleasant Point / 585 |
| 7. | 29.10 | Drew Plantation / 111 |
| 8. | 31.20 | Indian Island / 693 |
| 9. | 32.10 | Machias / 2,392 |
| 10. | 32.40 | Regional School Unit 34 / 10,342 |
| 11. | 34.70 | Nashville Plantation / 70 |
| 12. | 35.50 | Bangor / 32,988 |
| 13. | 36.20 | Waterville / 15,780 |
| 14. | 36.70 | Portland / 66,235 |
| 15. | 36.80 | Beaver Cove / 203 |
| 16. | 37.00 | Biddeford / 21,351 |
| 17. | 37.30 | Lewiston / 36,588 |
| 17. | 37.30 | Gorham / 16,395 |
| 19. | 37.70 | Cutler / 560 |
| 20. | 38.10 | Appleton / 1,642 |
| 21. | 38.60 | Regional School Unit 14 / 21,475 |
| 22. | 38.70 | School Administrative District 15 / 13,280 |
| 23. | 38.90 | Isle au Haut / 93 |
| 24. | 39.30 | School Administrative District 22 / 12,465 |
| 25. | 39.50 | School Administrative District 23 / 5,610 |
| 26. | 39.70 | School Administrative District 60 / 17,903 |
| 26. | 39.70 | Westbrook / 17,501 |
| 28. | 39.80 | Regional School Unit 04 / 10,431 |
| 29. | 40.00 | Sanford / 20,885 |
| 30. | 40.10 | School Administrative District 01 / 13,023 |
| 30. | 40.10 | Woodland / 1,215 |
| 30. | 40.10 | South Portland / 24,997 |
| 33. | 40.30 | Baring Plantation / 289 |
| 33. | 40.30 | Auburn / 23,104 |
| 35. | 40.50 | Dennysville / 408 |
| 36. | 40.60 | School Administrative District 57 / 21,912 |
| 37. | 40.80 | Lisbon / 9,023 |
| 38. | 40.90 | School Administrative District 09 / 17,751 |
| 38. | 40.90 | Name N/A / 10,191 |
| 38. | 40.90 | School Administrative District 06 / 25,994 |
| 38. | 40.90 | Jonesboro / 511 |
| 42. | 41.10 | Princeton / 815 |
| 42. | 41.10 | Regional School Unit 25 / 8,394 |
| 44. | 41.40 | Damariscotta / 2,170 |
| 44. | 41.40 | School Administrative District 42 / 2,284 |
| 44. | 41.40 | Regional School Unit 16 / 11,007 |
| 47. | 41.50 | Brunswick / 20,376 |
| 47. | 41.50 | School Administrative District 64 / 7,793 |
| 49. | 41.70 | Sedgwick / 1,226 |
| 49. | 41.70 | Regional School Unit 18 / 19,006 |
| 49. | 41.70 | East Machias / 1,235 |
| 52. | 41.80 | West Forks Plantation / 31 |
| 53. | 41.90 | Easton / 1,249 |
| 54. | 42.00 | Shirley / 320 |
| 54. | 42.00 | Marshfield / 424 |
| 56. | 42.10 | School Administrative District 35 / 13,454 |
| 56. | 42.10 | Dedham / 1,850 |
| 58. | 42.20 | Hermon / 5,432 |
| 58. | 42.20 | Greenbush / 1,326 |
| 58. | 42.20 | School Administrative District 49 / 14,826 |
| 61. | 42.30 | School Administrative District 55 / 8,061 |
| 62. | 42.40 | School Administrative District 03 / 10,466 |
| 62. | 42.40 | Regional School Unit 39 / 10,596 |
| 64. | 42.50 | School Administrative District 52 / 12,032 |
| 64. | 42.50 | Medford / 211 |
| 66. | 42.60 | School Administrative District 20 / 3,478 |
| 67. | 42.80 | Reed Plantation / 133 |
| 68. | 43.00 | School Administrative District 11 / 13,659 |
| 69. | 43.10 | Perry / 961 |
| 69. | 43.10 | Washington Unorganized Territory / 1,475 |
| 69. | 43.10 | Regional School Unit 02 / 14,802 |
| 72. | 43.20 | School Administrative District 54 / 17,259 |
| 72. | 43.20 | Augusta / 19,088 |
| 72. | 43.20 | School Administrative District 51 / 10,796 |
| 75. | 43.40 | School Administrative District 53 / 6,216 |
| 75. | 43.40 | Vassalboro / 4,354 |
| 75. | 43.40 | Hope / 1,635 |
| 75. | 43.40 | Regional School Unit 23 / 29,430 |
| 79. | 43.50 | Regional School Unit 05 / 13,256 |
| 79. | 43.50 | Milford / 3,056 |
| 81. | 43.60 | Tremont / 1,775 |
| 81. | 43.60 | School Administrative District 59 / 6,482 |
| 81. | 43.60 | Regional School Unit 19 / 14,814 |
| 84. | 43.70 | Regional School Unit 01 / 16,270 |
| 84. | 43.70 | School Administrative District 30 / 2,035 |
| 86. | 43.80 | Great Salt Bay Community School District / 4,768 |
| 87. | 43.90 | Yarmouth / 8,390 |
| 87. | 43.90 | Bar Harbor / 5,230 |
| 89. | 44.00 | School Administrative District 40 / 14,537 |
| 89. | 44.00 | Regional School Unit 12 / 14,737 |
| 91. | 44.10 | School Administrative District 29 / 8,199 |
| 91. | 44.10 | School Administrative District 44 / 5,903 |
| 93. | 44.20 | School Administrative District 31 / 4,033 |
| 94. | 44.30 | School Administrative District 45 / 2,346 |
| 94. | 44.30 | School Administrative District 46 / 6,550 |
| 94. | 44.30 | School Administrative District 17 / 24,188 |
| 97. | 44.40 | School Administrative District 72 / 7,759 |
| 97. | 44.40 | School Administrative District 74 / 5,330 |
| 99. | 44.50 | School Administrative District 07 / 456 |
| 99. | 44.50 | School Administrative District 12 / 1,114 |
| 101. | 44.60 | Brewer / 9,452 |
| 102. | 44.70 | School Administrative District 58 / 4,903 |
| 103. | 44.80 | Regional School Unit 20 / 18,290 |
| 103. | 44.80 | School Administrative District 68 / 6,850 |
| 103. | 44.80 | Dennistown Plantation / 9 |
| 106. | 45.00 | Waite / 100 |
| 106. | 45.00 | Scarborough / 18,941 |
| 108. | 45.10 | Surry / 1,736 |
| 109. | 45.30 | School Administrative District 37 / 5,873 |
| 110. | 45.40 | School Administrative District 63 / 6,369 |
| 111. | 45.70 | Medway / 1,332 |
| 111. | 45.70 | School Administrative District 75 / 19,564 |
| 111. | 45.70 | Winslow / 7,779 |
| 114. | 45.80 | Regional School Unit 10 / 18,910 |
| 115. | 46.00 | Southwest Harbor / 1,848 |
| 115. | 46.00 | Kittery / 9,538 |
| 115. | 46.00 | School Administrative District 61 / 14,444 |
| 118. | 46.20 | Machiasport / 1,161 |
| 118. | 46.20 | Winthrop / 6,107 |
| 118. | 46.20 | East Millinocket / 1,818 |
| 121. | 46.30 | Mount Desert Community School District / 10,939 |
| 122. | 46.40 | Regional School Unit 13 / 17,136 |
| 123. | 46.50 | Orrington / 3,737 |
| 123. | 46.50 | School Administrative District 67 / 6,398 |
| 123. | 46.50 | School Administrative District 41 / 4,454 |
| 123. | 46.50 | Lincoln Plantation / 38 |
| 123. | 46.50 | Newcastle / 1,814 |
| 128. | 46.60 | Franklin Unorganized Territory / 843 |
| 129. | 46.70 | Cranberry Isles / 98 |
| 130. | 46.80 | Falmouth / 11,233 |
| 131. | 46.90 | Pembroke / 931 |
| 131. | 46.90 | Name N/A / 31,164 |
| 133. | 47.00 | Bremen / 784 |
| 133. | 47.00 | Airline Community School District / 438 |
| 133. | 47.00 | School Administrative District 32 / 2,159 |
| 136. | 47.20 | School Administrative District 70 / 3,684 |
| 136. | 47.20 | Regional School Unit 24 / 18,720 |
| 136. | 47.20 | School Administrative District 04 / 5,172 |
| 139. | 47.30 | East Range Community School District / 202 |
| 139. | 47.30 | School Administrative District 76 / 386 |
| 141. | 47.40 | Name N/A / 5,673 |
| 141. | 47.40 | Bridgewater / 622 |
| 143. | 47.50 | Name N/A / 13,696 |
| 143. | 47.50 | Jefferson / 2,602 |
| 145. | 47.60 | Whiting / 512 |
| 145. | 47.60 | Nobleboro / 1,699 |
| 147. | 47.70 | Edgecomb / 1,082 |
| 147. | 47.70 | Trenton / 1,419 |
| 149. | 47.80 | Cape Elizabeth / 9,055 |
| 149. | 47.80 | Oxford Unorganized Territory / 594 |
| 151. | 47.90 | Regional School Unit 38 / 7,758 |
| 152. | 48.00 | School Administrative District 65 / 58 |
| 152. | 48.00 | Whitneyville / 187 |
| 152. | 48.00 | Penobscot Unorganized Territory / 1,192 |
| 155. | 48.10 | Baileyville / 1,392 |
| 155. | 48.10 | Grand Isle / 481 |
| 157. | 48.20 | School Administrative District 27 / 6,495 |
| 157. | 48.20 | Acton / 2,457 |
| 157. | 48.20 | York / 12,625 |
| 160. | 48.30 | School Administrative District 08 / 1,126 |
| 161. | 48.50 | Greenville / 1,692 |
| 161. | 48.50 | Regional School Unit 21 / 18,423 |
| 163. | 48.60 | Caratunk / 81 |
| 163. | 48.60 | School Administrative District 14 / 797 |
| 165. | 48.70 | Lowell / 292 |
| 165. | 48.70 | Fayette / 1,203 |
| 165. | 48.70 | Jonesport / 1,308 |
| 168. | 48.80 | Woodville / 219 |
| 168. | 48.80 | Crawford / 107 |
| 170. | 49.00 | Name N/A / 1,761 |
| 170. | 49.00 | Wells-Ogunquit Community School District / 10,845 |
| 172. | 49.20 | School Administrative District 28 / 8,227 |
| 172. | 49.20 | School Administrative District 13 / 1,439 |
| 174. | 49.50 | Meddybemps / 133 |
| 175. | 49.70 | Caswell / 312 |
| 176. | 49.90 | Calais / 3,132 |
| 177. | 50.10 | Lincolnville / 2,192 |
| 178. | 50.20 | New Sweden / 576 |
| 178. | 50.20 | Blue Hill / 2,681 |
| 178. | 50.20 | Beals / 453 |
| 181. | 50.40 | Gilead / 95 |
| 181. | 50.40 | Madawaska / 4,046 |
| 183. | 50.50 | Georgetown / 935 |
| 183. | 50.50 | Deblois / 40 |
| 185. | 50.60 | Harmony / 820 |
| 186. | 50.80 | Deer Isle-Stonington Community School District / 2,918 |
| 187. | 50.90 | Hancock Unorganized Territory / 162 |
| 188. | 51.10 | Northfield / 177 |
| 189. | 51.20 | School Administrative District 24 / 2,980 |
| 190. | 51.40 | Robbinston / 579 |
| 190. | 51.40 | Millinocket / 4,530 |
| 192. | 51.70 | School Administrative District 33 / 1,783 |
| 193. | 51.90 | Name N/A / 1,779 |
| 194. | 52.20 | Otis / 508 |
| 195. | 52.70 | Boothbay-Boothbay Harbor Community School District / 5,266 |
| 196. | 52.80 | Bancroft / 71 |
| 197. | 52.90 | Long Island / 310 |
| 197. | 52.90 | Somerset Unorganized Territory / 694 |
| 199. | 53.00 | Brooksville / 983 |
| 199. | 53.00 | Carrabassett Valley / 531 |
| 201. | 53.10 | Orient / 136 |
| 202. | 53.30 | Wesley / 90 |
| 202. | 53.30 | Vanceboro / 128 |
| 204. | 53.80 | Willimantic / 71 |
| 205. | 54.10 | Charlotte / 284 |
| 206. | 54.20 | Eastport / 1,458 |
| 207. | 54.30 | Carroll Plantation / 85 |
| 208. | 54.40 | Roque Bluffs / 236 |
| 209. | 54.50 | Monhegan Plantation / 34 |
| 210. | 54.80 | Aroostook Unorganized Territory / 1,408 |
| 211. | 55.20 | Brooklin / 981 |
| 212. | 55.30 | Alexander / 419 |
| 213. | 55.50 | Islesboro / 626 |
| 213. | 55.50 | School Administrative District 19 / 1,373 |
| 215. | 55.80 | Kingsbury Plantation / 17 |
| 216. | 56.30 | South Bristol / 964 |
| 217. | 56.50 | The Forks Plantation / 22 |
| 218. | 56.60 | Mount Desert / 2,086 |
| 219. | 57.40 | Macwahoc Plantation / 71 |
| 219. | 57.40 | Penobscot / 1,086 |
| 221. | 57.80 | Talmadge / 57 |
| 222. | 57.90 | Great Lake Stream Plantation / 115 |
| 223. | 58.00 | Coplin Plantation / 80 |
| 224. | 58.20 | Piscataquis Unorganized Territory / 971 |
| 225. | 58.40 | Cooper / 174 |
| 226. | 58.50 | Westmanland / 71 |
| 227. | 59.50 | Chebeague Island / 285 |
| 228. | 60.30 | Bowerbank / 88 |
| 229. | 60.50 | Upton / 76 |
| 230. | 60.80 | Bristol / 2,748 |
| 231. | 61.50 | Lake View Plantation / 71 |
| 232. | 62.80 | School Administration District 10 / 201 |
| 233. | 63.00 | Seboeis Plantation / 36 |
| 234. | 63.30 | Southport / 539 |
| 235. | 64.30 | Beddington / 57 |
| 236. | 65.00 | Lakeville / 76 |
| 237. | 65.20 | Pleasant Ridge Plantation / 106 |
| 238. | 66.70 | Highland Plantation / 70 |
Please note that we only rank locations with 'Median Age' data. The rank above might not be a complete list. Locations without 'Median Age' 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.
