| Zip Code | City | Population ↓ |
|---|---|---|
| 40069 | Springfield | 7,525 |
| 40078 | Willisburg | 3,021 |
| 40040 | Mackville | 705 |
| 40061 | Saint Catharine | 258 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 4 ZCTAs in Washington County, Kentucky (US Census).