| Rank | Average Family Size ▼ | School District / Population |
| 1. | 3.53 | Chelsea School District / 35,177 |
| 2. | 3.52 | Lawrence School District / 76,377 |
| 3. | 3.38 | Hopkinton School District / 14,925 |
| 4. | 3.37 | Brockton School District / 93,810 |
| 4. | 3.37 | Lynn School District / 90,329 |
| 6. | 3.34 | Hanover School District / 13,879 |
| 7. | 3.32 | Mansfield School District / 23,184 |
| 8. | 3.31 | Medfield School District / 12,024 |
| 8. | 3.31 | Randolph School District / 32,112 |
| 8. | 3.31 | Westwood School District / 14,618 |
| 8. | 3.31 | Somerset School District in Berkley (9-12) / 6,411 |
| 8. | 3.31 | Berkley School District / 6,411 |
| 8. | 3.31 | East Bridgewater School District / 13,794 |
| 8. | 3.31 | Lowell School District / 106,519 |
| 15. | 3.30 | Dover School District / 5,589 |
| 15. | 3.30 | Sudbury School District / 17,659 |
| 15. | 3.30 | Wilmington School District / 22,325 |
| 15. | 3.30 | Franklin School District / 31,635 |
| 19. | 3.29 | Norwell School District / 10,506 |
| 19. | 3.29 | Whitman-Hanson School District / 24,698 |
| 21. | 3.27 | Medway School District / 12,752 |
| 21. | 3.27 | Westford School District / 21,951 |
| 21. | 3.27 | Cohasset School District / 7,542 |
| 21. | 3.27 | Milton School District / 27,003 |
| 21. | 3.27 | Weston School District / 11,261 |
| 26. | 3.26 | Everett School District / 41,667 |
| 26. | 3.26 | Winchester School District / 21,374 |
| 26. | 3.26 | Dover-Sherborn School District / 9,708 |
| 26. | 3.26 | Pembroke School District / 17,837 |
| 30. | 3.25 | Lincoln-Sudbury School District / 24,021 |
| 30. | 3.25 | Groton-Dunstable School District / 13,825 |
| 30. | 3.25 | Wrentham School District / 10,955 |
| 30. | 3.25 | Southborough School District / 9,767 |
| 30. | 3.25 | Wellesley School District / 27,982 |
| 35. | 3.24 | Norfolk School District / 11,227 |
| 35. | 3.24 | Tyngsborough School District / 11,292 |
| 35. | 3.24 | Billerica School District / 40,243 |
| 38. | 3.23 | Boxford School District / 7,965 |
| 38. | 3.23 | Duxbury School District / 15,059 |
| 40. | 3.22 | North Reading School District / 14,892 |
| 40. | 3.22 | Masconomet School District / 23,037 |
| 40. | 3.22 | Springfield School District / 153,060 |
| 43. | 3.21 | Mendon-Upton School District / 13,381 |
| 43. | 3.21 | Topsfield School District / 6,085 |
| 43. | 3.21 | Methuen School District / 47,255 |
| 43. | 3.21 | Middleton School District / 8,987 |
| 43. | 3.21 | Sherborn School District / 4,119 |
| 43. | 3.21 | Walpole School District / 24,070 |
| 49. | 3.20 | Rochester School District / 5,232 |
| 49. | 3.20 | Lynnfield School District / 11,596 |
| 49. | 3.20 | King Philip School District / 30,446 |
| 49. | 3.20 | Kingston School District / 12,629 |
| 49. | 3.20 | Northborough-Southborough School District / 23,922 |
| 49. | 3.20 | Revere School District / 51,755 |
| 49. | 3.20 | Needham School District / 28,886 |
| 56. | 3.19 | Plympton School District / 2,820 |
| 56. | 3.19 | North Andover School District / 28,352 |
| 56. | 3.19 | Lakeville School District / 10,602 |
| 56. | 3.19 | Acton School District / 21,924 |
| 56. | 3.19 | Dighton-Rehoboth School District / 18,694 |
| 56. | 3.19 | Douglas School District / 8,471 |
| 62. | 3.18 | Hamilton-Wenham School District / 12,639 |
| 62. | 3.18 | Bridgewater-Raynham School District / 39,946 |
| 62. | 3.18 | Braintree School District / 35,744 |
| 62. | 3.18 | Georgetown School District / 8,183 |
| 62. | 3.18 | Holbrook School District / 10,791 |
| 62. | 3.18 | Andover School District / 33,201 |
| 62. | 3.18 | Tewksbury School District / 28,961 |
| 62. | 3.18 | Abington School District / 15,985 |
| 62. | 3.18 | Reading School District / 24,747 |
| 62. | 3.18 | Shrewsbury School District / 35,608 |
| 62. | 3.18 | Acton-Boxborough School District / 26,920 |
| 73. | 3.17 | Sharon School District / 17,612 |
| 73. | 3.17 | Northborough School District / 14,155 |
| 73. | 3.17 | Silver Lake School District / 22,967 |
| 73. | 3.17 | Dracut School District / 29,457 |
| 73. | 3.17 | Hingham School District / 22,157 |
| 78. | 3.16 | North Attleborough School District / 28,712 |
| 78. | 3.16 | Norton School District / 19,031 |
| 78. | 3.16 | Malden School District / 59,450 |
| 78. | 3.16 | Holyoke School District / 39,880 |
| 78. | 3.16 | Burlington School District / 24,498 |
| 78. | 3.16 | North Middlesex School District / 23,497 |
| 84. | 3.15 | Hopedale School District / 5,911 |
| 84. | 3.15 | Littleton School District / 8,924 |
| 84. | 3.15 | Sutton School District / 8,963 |
| 84. | 3.15 | Scituate School District / 18,133 |
| 84. | 3.15 | Foxborough School District / 16,865 |
| 89. | 3.14 | Holliston School District / 13,547 |
| 89. | 3.14 | Blackstone-Millville School District / 12,216 |
| 89. | 3.14 | Westborough School District / 18,272 |
| 89. | 3.14 | Boxborough School District / 4,996 |
| 89. | 3.14 | Easton School District / 23,112 |
| 89. | 3.14 | Rockland School District / 17,489 |
| 89. | 3.14 | Worcester School District / 181,045 |
| 89. | 3.14 | Nashoba School District / 19,542 |
| 89. | 3.14 | Canton School District / 21,561 |
| 89. | 3.14 | Wachusett School District / 41,346 |
| 99. | 3.13 | Carver School District / 11,509 |
| 99. | 3.13 | Freetown-Lakeville School District / 19,472 |
| 99. | 3.13 | Stoughton School District / 26,962 |
| 99. | 3.13 | Wayland School District / 12,994 |
| 99. | 3.13 | Halifax School District / 7,518 |
| 99. | 3.13 | Northbridge School District / 15,707 |
| 99. | 3.13 | Marshfield School District / 25,132 |
| 99. | 3.13 | Oxford School District / 13,709 |
| 107. | 3.12 | Leicester School District / 10,970 |
| 107. | 3.12 | Pentucket School District / 17,032 |
| 107. | 3.12 | Lexington School District / 31,394 |
| 110. | 3.11 | Bellingham School District / 16,332 |
| 110. | 3.11 | Millis School District / 7,891 |
| 110. | 3.11 | Carlisle School District / 4,852 |
| 110. | 3.11 | East Longmeadow School District / 15,720 |
| 110. | 3.11 | Winchendon School District / 10,300 |
| 110. | 3.11 | West Bridgewater School District / 6,916 |
| 110. | 3.11 | Attleboro School District / 43,593 |
| 117. | 3.10 | Fitchburg School District / 40,318 |
| 117. | 3.10 | Harvard School District / 6,520 |
| 117. | 3.10 | Grafton School District / 17,765 |
| 117. | 3.10 | Lincoln School District / 6,362 |
| 117. | 3.10 | Dudley-Charlton Regional School District / 24,371 |
| 117. | 3.10 | Uxbridge School District / 13,457 |
| 123. | 3.09 | Ashland School District / 16,593 |
| 123. | 3.09 | Middleborough School District / 23,116 |
| 123. | 3.09 | Saugus School District / 26,628 |
| 123. | 3.09 | Longmeadow School District / 15,784 |
| 123. | 3.09 | Avon School District / 4,356 |
| 123. | 3.09 | Ashburnham-Westminster School District / 13,358 |
| 129. | 3.08 | Boston School District / 617,594 |
| 129. | 3.08 | Acushnet School District / 10,303 |
| 129. | 3.08 | Fairhaven/New Bedford School Districts in Acushnet (9-12) / 10,303 |
| 129. | 3.08 | Haverhill School District / 60,879 |
| 129. | 3.08 | Seekonk School District / 13,722 |
| 129. | 3.08 | Quabbin School District / 15,671 |
| 129. | 3.08 | Milford School District / 27,999 |
| 136. | 3.07 | Weymouth School District / 53,743 |
| 136. | 3.07 | Hudson School District / 19,063 |
| 136. | 3.07 | Belmont School District / 24,729 |
| 136. | 3.07 | Wakefield School District / 24,932 |
| 136. | 3.07 | Plainville School District / 8,264 |
| 141. | 3.06 | Freetown School District / 8,870 |
| 141. | 3.06 | Ayer/Lunenberg School Districts in Shirley (9-12) / 7,211 |
| 141. | 3.06 | Chelmsford School District / 33,802 |
| 141. | 3.06 | Dedham School District / 24,729 |
| 141. | 3.06 | Woburn School District / 38,120 |
| 141. | 3.06 | Shirley School District / 7,211 |
| 141. | 3.06 | Granby School District / 6,240 |
| 141. | 3.06 | Taunton School District / 55,874 |
| 141. | 3.06 | Belchertown School District / 14,649 |
| 141. | 3.06 | Sandwich School District / 20,675 |
| 141. | 3.06 | Southwick-Tolland School District / 9,987 |
| 141. | 3.06 | Marlborough School District / 38,499 |
| 141. | 3.06 | Natick School District / 33,006 |
| 154. | 3.05 | Quincy School District / 92,271 |
| 154. | 3.05 | Narragansett School District / 9,695 |
| 154. | 3.05 | Melrose School District / 26,983 |
| 154. | 3.05 | Westfield School District / 41,094 |
| 158. | 3.04 | Lunenburg School District / 10,086 |
| 158. | 3.04 | Newton School District / 85,146 |
| 158. | 3.04 | Plymouth School District / 56,468 |
| 158. | 3.04 | Hampden-Wilbraham School District / 19,358 |
| 158. | 3.04 | Concord-Carlisle School District / 22,520 |
| 158. | 3.04 | Monson School District / 8,560 |
| 164. | 3.03 | Maynard School District / 10,106 |
| 164. | 3.03 | Norwood School District / 28,602 |
| 164. | 3.03 | Stoneham School District / 21,437 |
| 164. | 3.03 | West Springfield School District / 28,391 |
| 164. | 3.03 | Framingham School District / 68,318 |
| 164. | 3.03 | Danvers School District / 26,493 |
| 170. | 3.02 | North Brookfield School District / 4,680 |
| 170. | 3.02 | New Bedford School District / 95,072 |
| 170. | 3.02 | Triton School District / 20,805 |
| 170. | 3.02 | Amesbury School District / 16,283 |
| 170. | 3.02 | Auburn School District / 16,188 |
| 170. | 3.02 | Bedford School District / 13,320 |
| 170. | 3.02 | Concord School District / 17,668 |
| 170. | 3.02 | Manchester Essex Regional School District / 8,640 |
| 170. | 3.02 | Peabody School District / 51,251 |
| 170. | 3.02 | Sturbridge School District / 9,268 |
| 170. | 3.02 | Boylston School District / 4,355 |
| 181. | 3.01 | Old Rochester School District / 16,184 |
| 181. | 3.01 | Dartmouth School District / 34,032 |
| 181. | 3.01 | Athol-Royalston School District / 12,842 |
| 181. | 3.01 | Leominster School District / 40,759 |
| 181. | 3.01 | Marblehead School District / 19,808 |
| 186. | 3.00 | Medford School District / 56,173 |
| 186. | 3.00 | Southwick-Tolland School District in Granville (9-12) / 1,566 |
| 186. | 3.00 | Berlin-Boylston School District / 7,221 |
| 186. | 3.00 | Wales School District / 1,838 |
| 186. | 3.00 | Clinton School District / 13,606 |
| 186. | 3.00 | Millbury School District / 13,261 |
| 186. | 3.00 | Granville School District / 1,566 |
| 193. | 2.99 | Tantasqua School District / 20,586 |
| 193. | 2.99 | Waltham School District / 60,632 |
| 193. | 2.99 | Orange School District / 7,839 |
| 193. | 2.99 | Swampscott School District / 13,787 |
| 197. | 2.98 | Gill-Montague School District in Erving (7-12) / 1,800 |
| 197. | 2.98 | Southampton School District / 5,792 |
| 197. | 2.98 | Erving School District / 1,800 |
| 197. | 2.98 | Spencer-East Brookfield School District / 13,871 |
| 197. | 2.98 | Southbridge School District / 16,719 |
| 197. | 2.98 | Agawam School District / 28,438 |
| 197. | 2.98 | Swansea School District / 15,865 |
| 197. | 2.98 | Brimfield School District / 3,609 |
| 205. | 2.97 | Ludlow School District / 21,103 |
| 205. | 2.97 | Westport School District / 15,532 |
| 205. | 2.97 | Quaboag Regional School District / 8,836 |
| 205. | 2.97 | Berlin School District / 2,866 |
| 205. | 2.97 | Ayer School District / 7,427 |
| 205. | 2.97 | Somerset School District / 18,165 |
| 211. | 2.96 | Ipswich School District / 13,175 |
| 211. | 2.96 | Beverly School District / 39,502 |
| 211. | 2.96 | Brookfield School District / 3,390 |
| 214. | 2.94 | Mount Greylock/New Lebanon (NY) School Districts in Hancock (7-12) / 717 |
| 214. | 2.94 | Marion School District / 4,907 |
| 214. | 2.94 | Ralph C. Mahar School District / 10,911 |
| 214. | 2.94 | Wareham School District / 21,822 |
| 214. | 2.94 | West Boylston School District / 7,669 |
| 214. | 2.94 | Chicopee School District / 55,298 |
| 214. | 2.94 | Hancock School District / 717 |
| 221. | 2.93 | Arlington School District / 42,844 |
| 221. | 2.93 | Winthrop School District / 17,497 |
| 221. | 2.93 | Ware School District / 9,872 |
| 221. | 2.93 | Fairhaven School District / 15,873 |
| 221. | 2.93 | Nantucket School District / 10,172 |
| 221. | 2.93 | Fall River School District / 88,857 |
| 227. | 2.92 | Palmer School District / 12,140 |
| 227. | 2.92 | Newburyport School District / 17,416 |
| 227. | 2.92 | Salem School District / 41,340 |
| 227. | 2.92 | Somerville School District / 75,754 |
| 227. | 2.92 | Gateway School District / 9,040 |
| 227. | 2.92 | Shutesbury School District / 1,771 |
| 233. | 2.91 | Conway School District / 1,897 |
| 233. | 2.91 | Mattapoisett School District / 6,045 |
| 233. | 2.91 | Westhampton School District / 1,607 |
| 233. | 2.91 | Brookline School District / 58,732 |
| 237. | 2.90 | Webster School District / 16,767 |
| 237. | 2.90 | Hampshire School District / 12,157 |
| 237. | 2.90 | Holland School District / 2,481 |
| 237. | 2.90 | Hadley School District / 5,250 |
| 237. | 2.90 | Gloucester School District / 28,789 |
| 242. | 2.89 | North Adams School District in Clarksburg (9-12) / 1,702 |
| 242. | 2.89 | Clarksburg School District / 1,702 |
| 242. | 2.89 | Hull School District / 10,293 |
| 242. | 2.89 | Whately School District / 1,496 |
| 242. | 2.89 | Gardner School District / 20,228 |
| 247. | 2.88 | Amherst School District / 37,819 |
| 247. | 2.88 | Oak Bluffs School District / 4,527 |
| 247. | 2.88 | Petersham School District / 1,234 |
| 250. | 2.87 | Amherst-Pelham School District / 42,762 |
| 250. | 2.87 | Watertown School District / 31,915 |
| 250. | 2.87 | Chesterfield-Goshen School District / 2,276 |
| 250. | 2.87 | Central Berkshire School District / 13,723 |
| 254. | 2.86 | Pioneer Valley School District / 6,652 |
| 254. | 2.86 | Lanesborough School District / 3,319 |
| 254. | 2.86 | Pittsfield School District / 44,737 |
| 257. | 2.85 | Easthampton School District / 16,053 |
| 257. | 2.85 | Bourne School District / 19,754 |
| 257. | 2.85 | South Hadley School District / 17,514 |
| 260. | 2.84 | Frontier School District / 12,202 |
| 260. | 2.84 | Barnstable School District / 45,193 |
| 262. | 2.83 | Lenox School District / 5,025 |
| 262. | 2.83 | Greenfield School District / 17,456 |
| 262. | 2.83 | Savoy School District / 692 |
| 262. | 2.83 | Rowe School District / 393 |
| 262. | 2.83 | Deerfield School District / 5,125 |
| 262. | 2.83 | Mohawk Trail School District in Rowe (7-12) / 393 |
| 262. | 2.83 | Adams-Cheshire School District in Savoy (7-12) / 692 |
| 262. | 2.83 | Gill-Montague School District / 9,937 |
| 270. | 2.82 | Rockport School District / 6,952 |
| 270. | 2.82 | Lee School District / 6,270 |
| 272. | 2.81 | North Adams School District in Florida (9-12) / 752 |
| 272. | 2.81 | Leverett School District / 1,851 |
| 272. | 2.81 | Mashpee School District / 14,006 |
| 272. | 2.81 | Nahant School District / 3,410 |
| 272. | 2.81 | Martha's Vineyard School District / 16,460 |
| 272. | 2.81 | Mohawk Trail School District / 8,557 |
| 272. | 2.81 | Swampscott School District in Nahant (7-12) / 3,410 |
| 272. | 2.81 | Northampton School District / 28,549 |
| 280. | 2.80 | North Adams School District / 13,708 |
| 280. | 2.80 | New Salem-Wendell School District / 1,838 |
| 280. | 2.80 | Sunderland School District / 3,684 |
| 283. | 2.79 | Tisbury School District / 3,949 |
| 283. | 2.79 | Florida School District / 873 |
| 285. | 2.78 | Up-Island Regional School District / 3,917 |
| 285. | 2.78 | Southern Berkshire School District / 7,613 |
| 285. | 2.78 | Adams-Cheshire School District / 11,720 |
| 285. | 2.78 | Pelham School District / 1,321 |
| 285. | 2.78 | Edgartown School District / 4,067 |
| 290. | 2.77 | Hawlemont School District / 1,603 |
| 290. | 2.77 | Mount Greylock School District / 11,073 |
| 290. | 2.77 | Mohawk Trail Regional School District in Hawley and Charlemont towns / 1,603 |
| 290. | 2.77 | Falmouth School District / 31,531 |
| 294. | 2.76 | Hatfield School District / 3,279 |
| 294. | 2.76 | Cambridge School District / 105,162 |
| 296. | 2.75 | Berkshire Hills School District / 10,357 |
| 297. | 2.74 | Williamsburg School District / 2,482 |
| 298. | 2.71 | Williamstown School District / 7,754 |
| 298. | 2.71 | Harwich School District / 12,243 |
| 300. | 2.69 | Farmington River Regional School District / 2,527 |
| 300. | 2.69 | Lee/Berkshire Hills in Farmington River Regional (7-12) / 2,527 |
| 302. | 2.68 | Richmond School District / 1,475 |
| 302. | 2.68 | Pittsfield School District in Richmond (9-12) / 1,475 |
| 304. | 2.67 | Brewster School District / 9,820 |
| 304. | 2.67 | Gosnold School District / 75 |
| 306. | 2.66 | Dennis-Yarmouth School District / 38,000 |
| 307. | 2.64 | North Adams School District in Monroe (9-12) / 121 |
| 308. | 2.60 | Wellfleet School District / 2,750 |
| 309. | 2.59 | Nauset School District / 23,416 |
| 310. | 2.58 | Nauset/Provincetown School Districts in Turo (7-12) / 2,003 |
| 310. | 2.58 | Truro School District / 2,003 |
| 312. | 2.55 | Provincetown School District / 2,942 |
| 313. | 2.54 | Eastham School District / 4,956 |
| 314. | 2.50 | Chatham School District / 6,125 |
| 315. | 2.48 | Orleans School District / 5,890 |
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.
