29 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Louisville | Jefferson County | 617,027 |
| Lexington | Fayette County | 318,505 |
| Lawrenceburg | Anderson County | 12,365 |
| Lyndon | Jefferson County | 10,844 |
| La Grange | Oldham County | 10,651 |
| London | Laurel County | 7,607 |
| Lebanon | Marion County | 6,669 |
| Leitchfield | Grayson County | 6,497 |
| Ludlow | Kenton County | 4,292 |
| Lancaster | Garrard County | 4,150 |
| Lakeside Park | Kenton County | 2,796 |
| Louisa | Lawrence County | 2,534 |
| Liberty | Casey County | 1,988 |
| Ledbetter | Livingston County | 1,848 |
| Lebanon Junction | Bullitt County | 1,824 |
| Lewisport | Hancock County | 1,705 |
| Livermore | McLean County | 1,180 |
| Lynnview | Jefferson County | 924 |
| Langdon Place | Jefferson County | 858 |
| La Center | Ballard County | 850 |
| Lewisburg | Logan County | 789 |
| Loretto | Marion County | 712 |
| Lynch | Harlan County | 581 |
| Loyall | Harlan County | 573 |
| Lakeview Heights | Carter County | 268 |
| Lowes | Graves County | 193 |
| LaFayette | Christian County | 174 |
| Livingston | Rockcastle County | 165 |
| Lincolnshire | Jefferson County | 138 |