| Zip Code | City | Population ↓ |
|---|---|---|
| 41102 | Ashland | 21,026 |
| 41101 | Ashland | 18,686 |
| 41129 | Catlettsburg | 8,879 |
| 41168 | Rush | 3,891 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 4 ZCTAs in Boyd County, Kentucky (US Census).