37 cities
| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Mankato | 1 | 47,370 | 44,637 | 0.97% | 2,350 | 20 | City |
| North Mankato | 2 | 14,063 | 14,300 | -0.28% | 2,185 | 6 | City |
| Eagle Lake | 3 | 3,354 | 3,290 | 0.33% | 1,742 | 2 | City |
| Lake Crystal | 4 | 2,457 | 2,541 | -0.57% | 1,440 | 2 | City |
| Mankato | 5 | 1,710 | 1,757 | -0.7% | 70 | 24 | Township |
| Mapleton | 6 | 1,606 | 1,705 | -0.99% | 1,175 | 1 | City |
| South Bend | 7 | 1,545 | 1,590 | -0.64% | 94 | 16 | Township |
| Madison Lake | 8 | 1,345 | 1,252 | 1.2% | 994 | 1 | City |
| Decoria | 9 | 1,092 | 1,129 | -0.73% | 30 | 36 | Township |
| Rapidan | 10 | 1,027 | 1,057 | -0.48% | 29 | 35 | Township |
| Lime | 11 | 913 | 949 | -1.08% | 59 | 15 | Township |
| Garden City | 12 | 816 | 839 | -0.61% | 25 | 33 | Township |
| Le Ray | 13 | 739 | 760 | -0.67% | 23 | 32 | Township |
| St. Clair | 14 | 705 | 740 | -0.84% | 1,086 | 1 | City |
| Jamestown | 15 | 658 | 677 | -0.6% | 46 | 14 | Township |
| Good Thunder | 16 | 537 | 560 | -0.74% | 856 | 1 | City |
| Judson | 17 | 517 | 531 | -0.58% | 14 | 36 | Township |
| Amboy | 18 | 504 | 536 | -0.98% | 1,615 | 0 | City |
| McPherson | 19 | 411 | 424 | -0.72% | 12 | 35 | Township |
| Eagle Lake | 20 | 391 | 395 | -0.26% | 13 | 31 | Township |
| Beauford | 21 | 368 | 384 | -1.08% | 10 | 36 | Township |
| Medo | 22 | 316 | 321 | 0% | 9 | 35 | Township |
| Vernon Center | 23 | 308 | 328 | -0.96% | 630 | 0 | City |
| Lyra | 24 | 291 | 296 | 0% | 8 | 35 | Township |
| Butternut Valley | 25 | 285 | 296 | -1.04% | 8 | 35 | Township |
| Skyline | 26 | 280 | 286 | -0.36% | 1,429 | 0 | City |
| Mapleton | 27 | 275 | 279 | 0% | 8 | 34 | Township |
| Cambria | 28 | 245 | 253 | -0.81% | 13 | 19 | Township |
| Shelby | 29 | 235 | 247 | -1.26% | 7 | 35 | Township |
| Sterling | 30 | 234 | 242 | -0.85% | 7 | 34 | Township |
| Vernon Center | 31 | 232 | 242 | -1.28% | 7 | 35 | Township |
| Pemberton | 32 | 217 | 232 | -0.91% | 1,154 | 0 | City |
| Danville | 33 | 213 | 222 | -0.93% | 6 | 36 | Township |
| Lincoln | 34 | 209 | 209 | 0.48% | 6 | 36 | Township |
| Pleasant Mound | 35 | 192 | 200 | -1.03% | 5 | 36 | Township |
| Ceresco | 36 | 176 | 184 | -1.12% | 5 | 36 | Township |
| Amboy | 37 | 135 | 139 | -0.74% | 4 | 36 | Township |
Mankato is the largest city in Blue Earth County, with a population of 47,370.
Amboy is the smallest city in Blue Earth County, with a population of 135.
There are 37 cities in Blue Earth County, Minnesota.