38 ZIP Codes
| Zip Code | City | Population ↓ |
|---|---|---|
| 40214 | Louisville | 45,405 |
| 40216 | Louisville | 44,047 |
| 40299 | Louisville | 42,207 |
| 40229 | Louisville | 41,299 |
| 40291 | Louisville | 41,222 |
| 40219 | Louisville | 39,909 |
| 40245 | Louisville | 39,835 |
| 40272 | Louisville | 38,289 |
| 40220 | Louisville | 35,078 |
| 40218 | Louisville | 33,736 |
| 40241 | Louisville | 30,696 |
| 40207 | Louisville | 28,903 |
| 40258 | Louisville | 26,841 |
| 40205 | Louisville | 24,664 |
| 40223 | Louisville | 22,798 |
| 40222 | Louisville | 21,470 |
| 40215 | Louisville | 20,532 |
| 40211 | Louisville | 20,407 |
| 40206 | Louisville | 20,161 |
| 40228 | Louisville | 18,085 |
| 40203 | Louisville | 17,742 |
| 40213 | Louisville | 16,054 |
| 40208 | Louisville | 15,605 |
| 40212 | Louisville | 14,661 |
| 40204 | Louisville | 14,034 |
| 40210 | Louisville | 13,518 |
| 40243 | Louisville | 12,002 |
| 40217 | Louisville | 11,663 |
| 40242 | Louisville | 11,168 |
| 40118 | Fairdale | 10,697 |
| 40202 | Louisville | 7,261 |
| 40023 | Fisherville | 6,870 |
| 40209 | Louisville | 639 |
| 40025 | Glenview | 565 |
| 40041 | Masonic Home | 564 |
| 40280 | Louisville | 182 |
| 40231 | Louisville | 0 |
| 40221 | Louisville | 0 |
The data shown reflect ZCTAs from the US Census. As of 2025, there are 38 ZCTAs in Jefferson County, Kentucky (US Census).