| City | Rank | 2026 Pop. ↓ | 2020 Pop. | Annual Change | Density (/mi²) | Area (mi²) | Type |
|---|---|---|---|---|---|---|---|
| Spencer | 1 | 365 | 403 | -1.62% | 610 | 1 | Village |
| Butte | 2 | 263 | 281 | -1.13% | 560 | 0 | Village |
| Lynch | 3 | 179 | 194 | -1.1% | 335 | 1 | Village |
| Naper | 4 | 80 | 88 | -1.23% | 593 | 0 | Village |
| Bristow | 5 | 65 | 71 | -1.52% | 399 | 0 | Village |
| Anoka | 6 | 9 | 11 | 0% | 16 | 1 | Village |
| Gross | 7 | 2 | 2 | 0% | 16 | 0 | Village |
| Monowi | 8 | 2 | 2 | 0% | 9.0 | 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 2.
There are 8 cities in Boyd County, Nebraska.