38 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 40214 | Louisville | 46,033 |
| 40216 | Louisville | 43,167 |
| 40291 | Louisville | 40,888 |
| 40299 | Louisville | 40,816 |
| 40229 | Louisville | 39,621 |
| 40245 | Louisville | 38,861 |
| 40219 | Louisville | 38,245 |
| 40272 | Louisville | 38,114 |
| 40220 | Louisville | 34,649 |
| 40218 | Louisville | 33,479 |
| 40241 | Louisville | 30,986 |
| 40207 | Louisville | 29,014 |
| 40258 | Louisville | 27,487 |
| 40205 | Louisville | 24,890 |
| 40223 | Louisville | 23,477 |
| 40222 | Louisville | 21,359 |
| 40211 | Louisville | 21,135 |
| 40206 | Louisville | 20,315 |
| 40215 | Louisville | 19,494 |
| 40203 | Louisville | 17,964 |
| 40228 | Louisville | 17,808 |
| 40213 | Louisville | 15,779 |
| 40212 | Louisville | 15,412 |
| 40208 | Louisville | 15,126 |
| 40210 | Louisville | 14,980 |
| 40204 | Louisville | 14,362 |
| 40217 | Louisville | 12,439 |
| 40243 | Louisville | 11,943 |
| 40242 | Louisville | 11,544 |
| 40118 | Fairdale | 10,141 |
| 40202 | Louisville | 7,340 |
| 40023 | Fisherville | 6,293 |
| 40025 | Glenview | 560 |
| 40209 | Louisville | 515 |
| 40041 | Masonic Home | 495 |
| 40280 | Louisville | 218 |
| 40221 | Louisville | 0 |
| 40231 | Louisville | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 38 ZCTAs in Jefferson County, Kentucky (US Census).