| Rank | Median Age ▲ | School District / Population |
| 1. | 22.10 | Castine / 1,483 |
| 2. | 22.90 | Regional School Unit 26 / 16,708 |
| 2. | 22.90 | Indian Township / 767 |
| 4. | 25.50 | Kennebec Unorganized Territory / 70 |
| 5. | 26.50 | Frenchboro / 65 |
| 6. | 28.30 | Pleasant Point / 475 |
| 7. | 28.40 | Machias / 2,416 |
| 8. | 29.30 | Drew Plantation / 46 |
| 9. | 30.00 | School Administrative District 65 / 89 |
| 10. | 30.30 | Indian Island / 598 |
| 11. | 31.60 | Marshfield / 494 |
| 12. | 34.10 | Gorham / 16,065 |
| 13. | 34.20 | Regional School Unit 34 / 10,108 |
| 14. | 34.70 | Waterville / 15,777 |
| 15. | 34.80 | Nashville Plantation / 67 |
| 16. | 36.00 | Medford / 224 |
| 17. | 36.60 | Cutler / 644 |
| 18. | 36.80 | Lewiston / 36,684 |
| 19. | 37.40 | Portland / 66,138 |
| 20. | 37.50 | School Administrative District 22 / 12,468 |
| 21. | 37.70 | Bangor / 32,899 |
| 21. | 37.70 | Greenbush / 1,382 |
| 23. | 37.90 | School Administrative District 23 / 5,475 |
| 24. | 38.10 | Regional School Unit 14 / 21,108 |
| 25. | 38.20 | Biddeford / 21,490 |
| 26. | 38.40 | Lisbon / 9,092 |
| 27. | 38.60 | Brunswick / 20,557 |
| 27. | 38.60 | School Administrative District 15 / 13,059 |
| 29. | 38.70 | School Administrative District 57 / 21,609 |
| 30. | 38.80 | Oxford Unorganized Territory / 602 |
| 30. | 38.80 | Northfield / 171 |
| 32. | 38.90 | Dedham / 2,139 |
| 33. | 39.30 | School Administrative District 64 / 7,993 |
| 34. | 39.40 | Jay / 4,890 |
| 35. | 39.70 | Baring Plantation / 316 |
| 36. | 39.90 | Sanford / 21,035 |
| 36. | 39.90 | School Administrative District 49 / 14,919 |
| 38. | 40.00 | School Administrative District 60 / 17,650 |
| 38. | 40.00 | School Administrative District 01 / 12,845 |
| 38. | 40.00 | School Administrative District 36 / 5,322 |
| 38. | 40.00 | East Machias / 1,344 |
| 42. | 40.10 | School Administrative District 06 / 25,893 |
| 42. | 40.10 | Whitneyville / 235 |
| 44. | 40.20 | South Portland / 24,804 |
| 45. | 40.30 | Brewer / 9,433 |
| 45. | 40.30 | Appleton / 1,437 |
| 47. | 40.50 | West Forks Plantation / 24 |
| 47. | 40.50 | Regional School Unit 04 / 10,221 |
| 47. | 40.50 | School Administrative District 53 / 6,142 |
| 50. | 40.60 | School Administrative District 42 / 2,350 |
| 51. | 40.70 | Regional School Unit 25 / 8,461 |
| 51. | 40.70 | School Administrative District 03 / 10,528 |
| 51. | 40.70 | School Administrative District 09 / 18,036 |
| 54. | 40.80 | East Range Community School District / 232 |
| 54. | 40.80 | Regional School Unit 39 / 10,958 |
| 54. | 40.80 | Jonesboro / 653 |
| 54. | 40.80 | Sedgwick / 1,192 |
| 58. | 40.90 | Milford / 3,055 |
| 58. | 40.90 | Westbrook / 17,314 |
| 58. | 40.90 | Auburn / 23,279 |
| 61. | 41.00 | School Administrative District 40 / 14,808 |
| 62. | 41.10 | School Administrative District 51 / 10,679 |
| 62. | 41.10 | Regional School Unit 18 / 18,880 |
| 64. | 41.30 | Caratunk / 64 |
| 64. | 41.30 | Easton / 1,123 |
| 66. | 41.40 | Dennysville / 399 |
| 67. | 41.70 | Woodland / 1,085 |
| 67. | 41.70 | School Administrative District 35 / 13,431 |
| 69. | 41.80 | School Administrative District 67 / 6,652 |
| 70. | 41.90 | Regional School Unit 01 / 16,704 |
| 71. | 42.00 | School Administrative District 20 / 3,513 |
| 71. | 42.00 | School Administrative District 55 / 8,348 |
| 71. | 42.00 | Machiasport / 1,043 |
| 71. | 42.00 | Orient / 116 |
| 75. | 42.10 | Regional School Unit 02 / 14,748 |
| 75. | 42.10 | Regional School Unit 05 / 13,211 |
| 77. | 42.20 | School Administrative District 52 / 12,057 |
| 78. | 42.30 | Gilead / 145 |
| 78. | 42.30 | School Administrative District 41 / 4,842 |
| 78. | 42.30 | Kittery / 9,606 |
| 78. | 42.30 | Princeton / 898 |
| 82. | 42.40 | Caswell / 340 |
| 82. | 42.40 | Regional School Unit 16 / 10,969 |
| 84. | 42.50 | Willimantic / 132 |
| 84. | 42.50 | Hermon / 5,244 |
| 84. | 42.50 | School Administrative District 58 / 4,823 |
| 87. | 42.60 | School Administrative District 59 / 6,441 |
| 87. | 42.60 | School Administrative District 11 / 13,922 |
| 89. | 42.70 | School Administrative District 32 / 2,139 |
| 90. | 42.80 | Winslow / 7,823 |
| 90. | 42.80 | School Administrative District 17 / 23,682 |
| 90. | 42.80 | Meddybemps / 136 |
| 93. | 42.90 | School Administrative District 30 / 1,876 |
| 93. | 42.90 | Augusta / 19,150 |
| 93. | 42.90 | School Administrative District 46 / 6,645 |
| 96. | 43.10 | Isle au Haut / 85 |
| 96. | 43.10 | Regional School Unit 23 / 29,367 |
| 96. | 43.10 | Surry / 1,666 |
| 99. | 43.20 | Winthrop / 6,149 |
| 99. | 43.20 | School Administrative District 68 / 7,014 |
| 101. | 43.30 | School Administrative District 07 / 461 |
| 102. | 43.40 | Pembroke / 980 |
| 102. | 43.40 | Orrington / 3,710 |
| 104. | 43.50 | School Administrative District 45 / 2,504 |
| 104. | 43.50 | Southern Aroostook Community School District / 3,049 |
| 106. | 43.60 | School Administrative District 54 / 17,286 |
| 106. | 43.60 | School Administrative District 74 / 5,346 |
| 108. | 43.70 | Yarmouth / 8,390 |
| 108. | 43.70 | Regional School Unit 12 / 14,914 |
| 110. | 43.80 | School Administrative District 72 / 8,060 |
| 110. | 43.80 | Scarborough / 18,637 |
| 110. | 43.80 | Perry / 943 |
| 113. | 43.90 | Regional School Unit 19 / 14,947 |
| 114. | 44.00 | Hope / 1,521 |
| 115. | 44.20 | Regional School Unit 24 / 19,161 |
| 115. | 44.20 | School Administrative District 75 / 19,689 |
| 117. | 44.30 | Trenton / 1,453 |
| 118. | 44.40 | Falmouth / 11,086 |
| 118. | 44.40 | School Administrative District 44 / 6,036 |
| 118. | 44.40 | Airline Community School District / 458 |
| 121. | 44.50 | School Administrative District 61 / 14,134 |
| 122. | 44.60 | School Administrative District 29 / 8,208 |
| 123. | 44.70 | Jefferson / 2,529 |
| 123. | 44.70 | Medway / 1,223 |
| 125. | 44.90 | School Administrative District 63 / 6,002 |
| 126. | 45.00 | School Administrative District 31 / 3,830 |
| 127. | 45.20 | Regional School Unit 10 / 18,964 |
| 128. | 45.30 | Penobscot Unorganized Territory / 1,562 |
| 128. | 45.30 | Regional School Unit 20 / 18,312 |
| 130. | 45.50 | School Administrative District 12 / 949 |
| 131. | 45.60 | Cape Elizabeth / 9,056 |
| 131. | 45.60 | School Administrative District 27 / 6,683 |
| 133. | 45.70 | East Millinocket / 1,900 |
| 133. | 45.70 | Washington Unorganized Territory / 1,233 |
| 135. | 45.80 | Dallas Plantation / 290 |
| 135. | 45.80 | Edgecomb / 1,143 |
| 137. | 45.90 | School Administrative District 37 / 5,522 |
| 138. | 46.10 | Vassalboro / 4,311 |
| 138. | 46.10 | School Administrative District 04 / 4,994 |
| 138. | 46.10 | School Administrative District 76 / 443 |
| 141. | 46.20 | Regional School Unit 13 / 17,358 |
| 142. | 46.30 | Franklin Unorganized Territory / 865 |
| 143. | 46.40 | Bar Harbor / 5,194 |
| 144. | 46.50 | School Administrative District 70 / 3,645 |
| 144. | 46.50 | York / 12,720 |
| 146. | 46.60 | Southwest Harbor / 1,725 |
| 146. | 46.60 | Lowell / 223 |
| 146. | 46.60 | Baileyville / 1,554 |
| 149. | 46.90 | Tremont / 1,412 |
| 149. | 46.90 | Mount Desert Community School District / 10,039 |
| 151. | 47.20 | Jonesport / 1,338 |
| 151. | 47.20 | Bridgewater / 640 |
| 153. | 47.30 | Grand Isle / 532 |
| 153. | 47.30 | Regional School Unit 38 / 7,458 |
| 153. | 47.30 | Nobleboro / 1,647 |
| 156. | 47.50 | Beals / 602 |
| 156. | 47.50 | Wesley / 84 |
| 156. | 47.50 | Shirley / 263 |
| 159. | 47.60 | Whiting / 528 |
| 160. | 47.90 | Fayette / 1,281 |
| 161. | 48.00 | Regional School Unit 21 / 18,423 |
| 162. | 48.10 | Woodville / 274 |
| 162. | 48.10 | Deer Isle-Stonington Community School District / 3,084 |
| 164. | 48.20 | School Administrative District 14 / 803 |
| 165. | 48.30 | Name N/A / 14,506 |
| 165. | 48.30 | Lincolnville / 1,846 |
| 165. | 48.30 | Acton / 2,001 |
| 165. | 48.30 | Waite / 60 |
| 169. | 48.50 | Madawaska / 4,141 |
| 170. | 48.60 | Harmony / 1,000 |
| 171. | 48.70 | Rangeley / 1,177 |
| 171. | 48.70 | Damariscotta / 2,216 |
| 171. | 48.70 | School Administrative District 25 / 2,761 |
| 171. | 48.70 | School Administrative District 28 / 8,373 |
| 175. | 48.90 | Wells-Ogunquit Community School District / 10,763 |
| 176. | 49.30 | Reed Plantation / 108 |
| 176. | 49.30 | Hancock Unorganized Territory / 168 |
| 178. | 49.40 | Charlotte / 311 |
| 178. | 49.40 | Crawford / 109 |
| 178. | 49.40 | Carrabassett Valley / 470 |
| 181. | 49.60 | School Administrative District 08 / 1,090 |
| 182. | 49.70 | Blue Hill / 2,649 |
| 182. | 49.70 | Deblois / 50 |
| 182. | 49.70 | New Sweden / 513 |
| 185. | 49.80 | Mount Desert / 1,708 |
| 186. | 49.90 | Vanceboro / 129 |
| 186. | 49.90 | Brooklin / 1,022 |
| 188. | 50.10 | Newcastle / 1,576 |
| 188. | 50.10 | Boothbay-Boothbay Harbor Community School District / 5,544 |
| 190. | 50.30 | Robbinston / 592 |
| 191. | 50.50 | Millinocket / 4,655 |
| 191. | 50.50 | Great Salt Bay Community School District / 4,467 |
| 193. | 50.90 | Somerset Unorganized Territory / 876 |
| 193. | 50.90 | Piscataquis Unorganized Territory / 936 |
| 195. | 51.10 | Long Island / 261 |
| 195. | 51.10 | School Administrative District 24 / 2,987 |
| 195. | 51.10 | School Administrative District 33 / 1,877 |
| 198. | 51.30 | Bancroft / 62 |
| 198. | 51.30 | Cranberry Isles / 101 |
| 198. | 51.30 | School Administrative District 13 / 1,314 |
| 201. | 51.40 | Otis / 400 |
| 202. | 51.50 | Alexander / 350 |
| 203. | 52.20 | Moro Plantation / 16 |
| 204. | 52.30 | Eastport / 1,425 |
| 205. | 52.50 | Islesboro / 649 |
| 206. | 52.70 | Greenville / 1,606 |
| 207. | 52.80 | Lincoln Plantation / 66 |
| 207. | 52.80 | Calais / 3,192 |
| 209. | 53.30 | Sandy River Plantation / 94 |
| 210. | 53.50 | Talmadge / 40 |
| 211. | 53.60 | School Administrative District 19 / 1,423 |
| 212. | 53.80 | Aroostook Unorganized Territory / 1,513 |
| 213. | 54.20 | Bremen / 675 |
| 214. | 54.70 | Monhegan Plantation / 40 |
| 214. | 54.70 | Cooper / 202 |
| 216. | 55.20 | Lake View Plantation / 100 |
| 217. | 55.30 | South Bristol / 976 |
| 218. | 55.50 | Georgetown / 712 |
| 219. | 56.30 | Seboeis Plantation / 36 |
| 220. | 56.40 | Bowerbank / 98 |
| 221. | 56.50 | Roque Bluffs / 251 |
| 222. | 56.70 | Bristol / 2,766 |
| 223. | 57.10 | Coplin Plantation / 97 |
| 224. | 57.20 | Brooksville / 1,005 |
| 225. | 57.60 | Upton / 75 |
| 226. | 57.80 | Carroll Plantation / 91 |
| 227. | 58.20 | Lakeville / 72 |
| 228. | 58.70 | Great Lake Stream Plantation / 122 |
| 229. | 59.00 | Macwahoc Plantation / 46 |
| 230. | 59.30 | Southport / 541 |
| 230. | 59.30 | Magalloway Plantation / 31 |
| 232. | 59.70 | Kingsbury Plantation / 10 |
| 233. | 60.90 | Rangeley Plantation / 109 |
| 234. | 61.20 | School Administration District 10 / 191 |
| 235. | 62.50 | Beddington / 77 |
| 235. | 62.50 | Hersey / 51 |
| 237. | 63.00 | Westmanland / 90 |
| 238. | 63.50 | Beaver Cove / 126 |
| 239. | 64.50 | Chebeague Island / 240 |
| 240. | 64.80 | Pleasant Ridge Plantation / 97 |
| 241. | 64.90 | Penobscot / 1,377 |
| 242. | 65.20 | The Forks Plantation / 28 |
| 243. | 71.50 | Highland Plantation / 56 |
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.
