16 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Cambridge | 1 | 11,296 | 9,683 | 2.93% | 1,510 | 7 | City |
| Isanti | 2 | 7,646 | 6,880 | 2.04% | 1,502 | 5 | City |
| Bradford | 3 | 3,487 | 3,433 | -0.4% | 102 | 34 | Township |
| Cambridge | 4 | 2,537 | 2,499 | -0.35% | 87 | 29 | Township |
| Stanford | 5 | 2,346 | 2,314 | -0.42% | 61 | 38 | Township |
| Isanti | 6 | 2,317 | 2,278 | -0.3% | 86 | 27 | Township |
| Athens | 7 | 2,138 | 2,115 | -0.09% | 70 | 31 | Township |
| Wyanett | 8 | 1,796 | 1,772 | -0.39% | 54 | 33 | Township |
| Braham | 9 | 1,770 | 1,798 | -0.34% | 1,089 | 2 | City |
| Spencer Brook | 10 | 1,695 | 1,672 | -0.41% | 50 | 34 | Township |
| Springvale | 11 | 1,596 | 1,575 | -0.5% | 47 | 34 | Township |
| Stanchfield | 12 | 1,175 | 1,158 | -0.34% | 35 | 33 | Township |
| Oxford | 13 | 1,004 | 986 | -0.2% | 45 | 23 | Township |
| Dalbo | 14 | 792 | 785 | -0.63% | 22 | 35 | Township |
| Maple Ridge | 15 | 728 | 718 | -0.27% | 21 | 35 | Township |
| Stanchfield | 16 | 88 | 73 | -2.22% | 119 | 1 | CDP |
Cambridge is the largest city in Isanti County, with a population of 11,296.
Stanchfield is the smallest city in Isanti County, with a population of 88.
There are 16 cities in Isanti County, Minnesota.