| City | County | 2026 Pop. ↓ |
|---|---|---|
| Louisville | Jefferson County | 644,291 |
| Lexington | Fayette County | 330,863 |
| Lawrenceburg | Anderson County | 12,452 |
| Lyndon | Jefferson County | 11,351 |
| La Grange | Oldham County | 10,791 |
| London | Laurel County | 7,639 |
| Leitchfield | Grayson County | 7,054 |
| Lebanon | Marion County | 6,777 |
| Ludlow | Kenton County | 4,391 |
| Lancaster | Garrard County | 4,150 |
| Lakeside Park | Kenton County | 2,849 |
| Louisa | Lawrence County | 2,485 |
| Liberty | Casey County | 2,016 |
| Lebanon Junction | Bullitt County | 1,854 |
| Lewisport | Hancock County | 1,740 |
| Ledbetter | Livingston County | 1,618 |
| Livermore | McLean County | 1,191 |
| Lynnview | Jefferson County | 966 |
| Langdon Place | Jefferson County | 894 |
| La Center | Ballard County | 855 |
| Lewisburg | Logan County | 783 |
| Loretto | Marion County | 713 |
| Lynch | Harlan County | 581 |
| Loyall | Harlan County | 565 |
| Lakeview Heights | Carter County | 269 |
| LaFayette | Christian County | 171 |
| Livingston | Rockcastle County | 165 |
| Lowes | Graves County | 155 |
| Lincolnshire | Jefferson County | 139 |