33 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Quincy | 1 | 105,694 | 101,492 | 1.08% | 6,377 | 17 | City |
| Quincy | 2 | 104,405 | 101,492 | 0.47% | 6,300 | 17 | City |
| Brookline | 3 | 65,399 | 63,022 | 1.14% | 9,674 | 7 | Town |
| Weymouth Town | 4 | 61,503 | 57,471 | 1.1% | 3,669 | 17 | City |
| Weymouth Town | 5 | 61,391 | 57,471 | 1.01% | 3,662 | 17 | City |
| Braintree Town | 6 | 39,860 | 39,075 | 0.92% | 2,896 | 14 | City |
| Braintree Town | 7 | 39,163 | 39,075 | 0.04% | 2,846 | 14 | City |
| Randolph Town | 8 | 35,752 | 34,971 | 0.9% | 3,637 | 10 | City |
| Randolph Town | 9 | 35,185 | 34,971 | 0.1% | 3,580 | 10 | City |
| Franklin Town | 10 | 34,474 | 32,324 | 1.07% | 1,294 | 27 | City |
| Franklin Town | 11 | 34,451 | 32,324 | 1.04% | 1,293 | 27 | City |
| Needham | 12 | 33,779 | 32,238 | 1.27% | 2,747 | 12 | Town |
| Norwood | 13 | 32,314 | 31,574 | 0.86% | 3,113 | 10 | Town |
| Wellesley | 14 | 32,126 | 28,774 | 1.4% | 3,206 | 10 | Town |
| Stoughton | 15 | 30,011 | 29,251 | 0.93% | 1,866 | 16 | Town |
| Milton | 16 | 29,303 | 28,596 | 0.85% | 2,252 | 13 | Town |
| Walpole | 17 | 26,857 | 26,519 | 0.88% | 1,313 | 20 | Town |
| Dedham | 18 | 25,973 | 25,217 | 0.95% | 2,529 | 10 | Town |
| Canton | 19 | 25,887 | 24,397 | 1.42% | 1,381 | 19 | Town |
| Foxborough | 20 | 19,129 | 18,600 | 0.89% | 963 | 20 | Town |
| Sharon | 21 | 19,126 | 18,547 | 0.96% | 816 | 23 | Town |
| Bellingham | 22 | 18,634 | 16,951 | 1.74% | 1,016 | 18 | Town |
| Westwood | 23 | 16,891 | 16,229 | 1.07% | 1,552 | 11 | Town |
| Medway | 24 | 14,176 | 13,086 | 1.21% | 1,229 | 12 | Town |
| Medfield | 25 | 13,632 | 12,803 | 1.11% | 946 | 14 | Town |
| Wrentham | 26 | 12,798 | 12,165 | 1.11% | 590 | 22 | Town |
| Norfolk | 27 | 12,532 | 11,562 | 2.33% | 841 | 15 | Town |
| Holbrook | 28 | 11,701 | 11,384 | 0.98% | 1,613 | 7 | Town |
| Plainville | 29 | 10,287 | 9,931 | 1.08% | 936 | 11 | Town |
| Millis | 30 | 9,856 | 8,501 | 2.7% | 819 | 12 | Town |
| Cohasset | 31 | 8,690 | 8,379 | 0.92% | 888 | 10 | Town |
| Dover | 32 | 6,353 | 5,918 | 2.39% | 421 | 15 | Town |
| Avon | 33 | 4,879 | 4,773 | 0.81% | 1,137 | 4 | Town |
Quincy is the largest city in Norfolk County, with a population of 105,694.
Avon is the smallest city in Norfolk County, with a population of 4,879.
There are 33 cities in Norfolk County, Massachusetts.