29 cities
| City | County | 2025 Pop. ↓ |
|---|---|---|
| Louisville | Jefferson County | 643,033 |
| Lexington | Fayette County | 331,139 |
| Lawrenceburg | Anderson County | 12,302 |
| Lyndon | Jefferson County | 11,274 |
| La Grange | Oldham County | 10,659 |
| London | Laurel County | 7,572 |
| Leitchfield | Grayson County | 6,924 |
| Lebanon | Marion County | 6,624 |
| Ludlow | Kenton County | 4,390 |
| Lancaster | Garrard County | 4,127 |
| Lakeside Park | Kenton County | 2,855 |
| Louisa | Lawrence County | 2,470 |
| Liberty | Casey County | 1,993 |
| Ledbetter | Livingston County | 1,848 |
| Lebanon Junction | Bullitt County | 1,834 |
| Lewisport | Hancock County | 1,735 |
| Livermore | McLean County | 1,198 |
| Lynnview | Jefferson County | 962 |
| Langdon Place | Jefferson County | 893 |
| La Center | Ballard County | 859 |
| Lewisburg | Logan County | 781 |
| Loretto | Marion County | 708 |
| Lynch | Harlan County | 588 |
| Loyall | Harlan County | 581 |
| Lakeview Heights | Carter County | 273 |
| Lowes | Graves County | 193 |
| LaFayette | Christian County | 171 |
| Livingston | Rockcastle County | 165 |
| Lincolnshire | Jefferson County | 140 |