38 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 40214 | Louisville | 45,986 |
| 40216 | Louisville | 43,764 |
| 40299 | Louisville | 41,724 |
| 40291 | Louisville | 41,506 |
| 40229 | Louisville | 40,015 |
| 40245 | Louisville | 39,261 |
| 40219 | Louisville | 39,107 |
| 40272 | Louisville | 37,595 |
| 40220 | Louisville | 33,893 |
| 40218 | Louisville | 33,292 |
| 40241 | Louisville | 30,910 |
| 40207 | Louisville | 28,633 |
| 40258 | Louisville | 26,590 |
| 40205 | Louisville | 24,335 |
| 40223 | Louisville | 23,264 |
| 40222 | Louisville | 21,634 |
| 40211 | Louisville | 21,165 |
| 40206 | Louisville | 20,345 |
| 40215 | Louisville | 19,444 |
| 40228 | Louisville | 18,491 |
| 40203 | Louisville | 17,540 |
| 40213 | Louisville | 15,805 |
| 40208 | Louisville | 15,287 |
| 40212 | Louisville | 15,160 |
| 40210 | Louisville | 14,226 |
| 40204 | Louisville | 14,018 |
| 40243 | Louisville | 12,049 |
| 40217 | Louisville | 11,831 |
| 40242 | Louisville | 11,099 |
| 40118 | Fairdale | 9,903 |
| 40202 | Louisville | 7,109 |
| 40023 | Fisherville | 6,484 |
| 40025 | Glenview | 652 |
| 40209 | Louisville | 571 |
| 40041 | Masonic Home | 518 |
| 40280 | Louisville | 193 |
| 40231 | Louisville | 0 |
| 40221 | Louisville | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 38 ZCTAs in Jefferson County, Kentucky (US Census).