12 cities
| City | Rank | 2025 Pop. ↓ | 2020 Pop. | Change | Density | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Hebron | 1 | 1,344 | 1,453 | -1.61% | 911 | 1.48 | City |
| Deshler | 2 | 717 | 736 | -0.56% | 1,411 | 0.51 | City |
| Davenport | 3 | 295 | 317 | -1.34% | 452 | 0.65 | Village |
| Bruning | 4 | 264 | 284 | -1.49% | 815 | 0.32 | Village |
| Chester | 5 | 206 | 221 | -1.44% | 352 | 0.59 | Village |
| Alexandria | 6 | 134 | 146 | -1.47% | 332 | 0.40 | Village |
| Carleton | 7 | 83 | 90 | -1.19% | 105 | 0.79 | Village |
| Byron | 8 | 82 | 89 | -1.21% | 526 | 0.16 | Village |
| Hubbell | 9 | 57 | 62 | -1.72% | 183 | 0.31 | Village |
| Reynolds | 10 | 54 | 58 | -1.82% | 215 | 0.25 | Village |
| Belvidere | 11 | 52 | 56 | -1.89% | 112 | 0.47 | Village |
| Gilead | 12 | 29 | 31 | 0% | 420 | 0.07 | Village |
Hebron is the largest city in Thayer County, with a population of 1,344.
Gilead is the smallest city in Thayer County.
There are 12 cities in Thayer County, Nebraska.