19 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Pleasant township | 1 | 14,729 | 14,465 | 0.33% | 459 | 32.10 | Township |
| Angola | 2 | 9,519 | 9,361 | 0.34% | 1,443 | 6.60 | City |
| Hamilton township | 3 | 7,341 | 7,163 | 0.66% | 247 | 29.70 | Township |
| Hamilton township | 4 | 7,040 | 7,130 | -0.18% | 118 | 59.61 | Township |
| Steuben township | 5 | 2,965 | 2,894 | 0.44% | 88 | 33.78 | Township |
| Fremont township | 6 | 2,943 | 2,881 | 0.38% | 128 | 22.94 | Township |
| Otsego township | 7 | 2,539 | 2,473 | 0.51% | 76 | 33.30 | Township |
| Fremont | 8 | 2,085 | 2,030 | 0.53% | 671 | 3.11 | Town |
| Hudson township | 9 | 1,820 | 1,849 | -0.44% | 143 | 12.73 | Township |
| Jackson township | 10 | 1,757 | 1,690 | 0.75% | 52 | 33.99 | Township |
| Millgrove township | 11 | 1,621 | 1,583 | 0.5% | 74 | 22.03 | Township |
| Hamilton township | 12 | 1,585 | 1,569 | 0.7% | 25 | 62.59 | Township |
| Hamilton | 13 | 1,572 | 1,527 | 0.58% | 748 | 2.10 | Town |
| Scott township | 14 | 1,204 | 1,187 | 0.25% | 42 | 28.69 | Township |
| Clear Lake township | 15 | 826 | 807 | 0.49% | 86 | 9.56 | Township |
| York township | 16 | 709 | 693 | 0.42% | 32 | 22.19 | Township |
| Hudson | 17 | 597 | 581 | 0.51% | 858 | 0.70 | Town |
| Orland | 18 | 397 | 389 | 0.51% | 579 | 0.69 | Town |
| Clear Lake | 19 | 359 | 354 | 0.28% | 323 | 1.11 | Town |
Pleasant township is the largest city in Steuben County, with a population of 14,729.
Clear Lake is the smallest city in Steuben County.
There are 19 cities in Steuben County, Indiana.