29 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Manchester | 1 | 114,888 | 115,508 | -0.25% | 3,474 | 33.07 | City |
| Nashua | 2 | 90,343 | 91,199 | -0.36% | 2,930 | 30.83 | City |
| Merrimack | 3 | 29,580 | 26,835 | 1.14% | 908 | 32.59 | Town |
| Hudson | 4 | 25,639 | 25,366 | 0.09% | 907 | 28.28 | Town |
| Bedford | 5 | 23,660 | 23,383 | -0.22% | 722 | 32.78 | Town |
| Goffstown | 6 | 18,477 | 18,564 | -0.14% | 499 | 37.01 | Town |
| Milford | 7 | 16,508 | 16,133 | 0.27% | 650 | 25.41 | Town |
| Pelham | 8 | 14,577 | 14,237 | 0.22% | 553 | 26.34 | Town |
| Amherst | 9 | 11,843 | 11,752 | -0.15% | 349 | 33.91 | Town |
| Weare | 10 | 9,189 | 9,083 | -0.04% | 156 | 59.07 | Town |
| Hollis | 11 | 8,783 | 8,364 | 0.34% | 277 | 31.73 | Town |
| Litchfield | 12 | 8,480 | 8,473 | -0.14% | 568 | 14.92 | Town |
| Peterborough | 13 | 6,520 | 6,414 | 0.15% | 171 | 38.02 | Town |
| New Boston | 14 | 6,216 | 6,113 | 0.27% | 145 | 42.81 | Town |
| Hillsborough | 15 | 5,996 | 5,943 | 0.1% | 137 | 43.70 | Town |
| Brookline | 16 | 5,813 | 5,646 | 0.34% | 293 | 19.84 | Town |
| New Ipswich | 17 | 5,434 | 5,209 | 0.65% | 166 | 32.73 | Town |
| Wilton | 18 | 3,978 | 3,905 | 0.07% | 155 | 25.61 | Town |
| Mont Vernon | 19 | 2,732 | 2,595 | 1.07% | 162 | 16.82 | Town |
| Antrim | 20 | 2,723 | 2,644 | 0.52% | 76 | 35.70 | Town |
| Greenville | 21 | 1,981 | 1,971 | -0.4% | 288 | 6.88 | Town |
| Deering | 22 | 1,925 | 1,899 | 0.05% | 63 | 30.59 | Town |
| Hancock | 23 | 1,752 | 1,729 | 0.06% | 58 | 29.97 | Town |
| Greenfield | 24 | 1,715 | 1,709 | 0.41% | 65 | 26.21 | Town |
| Lyndeborough | 25 | 1,697 | 1,699 | -0.18% | 56 | 30.44 | Town |
| Francestown | 26 | 1,643 | 1,607 | 0.06% | 55 | 29.81 | Town |
| Bennington | 27 | 1,502 | 1,494 | -0.07% | 132 | 11.36 | Town |
| Mason | 28 | 1,462 | 1,443 | 0.21% | 61 | 23.93 | Town |
| Temple | 29 | 1,401 | 1,378 | 0.36% | 63 | 22.25 | Town |
Manchester is the largest city in Hillsborough County, with a population of 114,888.
Temple is the smallest city in Hillsborough County.
There are 29 cities in Hillsborough County, New Hampshire.