19 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Annual Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Pleasant | 1 | 14,584 | 14,468 | -0.12% | 454 | 32 | Township |
| Angola | 2 | 9,448 | 9,366 | 0.17% | 1,432 | 7 | City |
| Hamilton | 3 | 7,343 | 7,164 | 0.58% | 247 | 30 | Township |
| Hamilton | 4 | 7,073 | 7,134 | -0.17% | 119 | 60 | Township |
| Steuben | 5 | 2,941 | 2,895 | 0.03% | 87 | 34 | Township |
| Fremont | 6 | 2,916 | 2,882 | -0.07% | 127 | 23 | Township |
| Otsego | 7 | 2,512 | 2,475 | 0% | 75 | 33 | Township |
| Fremont | 8 | 2,072 | 2,034 | 0.34% | 667 | 3 | Town |
| Hudson | 9 | 1,838 | 1,849 | -0.05% | 144 | 13 | Township |
| Jackson | 10 | 1,726 | 1,690 | 0.12% | 51 | 34 | Township |
| Hamilton | 11 | 1,621 | 1,570 | 1.44% | 26 | 63 | Township |
| Millgrove | 12 | 1,598 | 1,584 | -0.06% | 73 | 22 | Township |
| Hamilton | 13 | 1,562 | 1,527 | 0.45% | 743 | 2 | Town |
| Scott | 14 | 1,195 | 1,185 | -0.08% | 42 | 29 | Township |
| Clear Lake | 15 | 826 | 809 | 0.12% | 86 | 10 | Township |
| York | 16 | 699 | 691 | 0% | 31 | 22 | Township |
| Hudson | 17 | 594 | 581 | 0.34% | 853 | 1 | Town |
| Orland | 18 | 393 | 388 | 0.26% | 573 | 1 | Town |
| Clear Lake | 19 | 358 | 355 | 0% | 322 | 1 | Town |
Pleasant is the largest city in Steuben County, with a population of 14,584.
Clear Lake is the smallest city in Steuben County, with a population of 358.
There are 19 cities in Steuben County, Indiana.