| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Spencer | 1 | 365 | 403 | -1.62% | 610 | 1 | Village |
| Butte | 2 | 254 | 276 | -1.17% | 540 | 0 | Village |
| Lynch | 3 | 180 | 197 | -1.64% | 337 | 1 | Village |
| Naper | 4 | 80 | 89 | -2.44% | 593 | 0 | Village |
| Bristow | 5 | 68 | 75 | -1.45% | 417 | 0 | Village |
| Anoka | 6 | 8 | 10 | -11.11% | 14 | 1 | Village |
| Gross | 7 | 3 | 3 | 0% | 23 | 0 | Village |
| Monowi | 8 | 1 | 1 | 0% | 5.0 | 0 | Village |
Spencer is the largest city in Boyd County, with a population of 365.
Monowi is the smallest city in Boyd County, with a population of 1.
There are 8 cities in Boyd County, Nebraska.