Admitted to the Union on June 1, 1792 as the 15th state.
- 1790 – 1800 federal censuses lost for all counties.
- 1810—1940 federal censuses extant for all counties except for 1890.
- 1890 Census of Union Veterans lost for western Kentucky, extant for eastern Kentucky.
| Adair | Allen | Anderson | Ballard |
| Barren | Bath | Bell | Boone |
| Bourbon | Boyd | Boyle | Bracken |
| Breathitt | Breckinridge | Bullitt | Butler |
| Caldwell | Calloway | Campbell | Carlisle |
| Carroll | Carter | Casey | Christian |
| Clark | Clay | Clinton | Crittenden |
| Cumberland | Daviess | Edmonson | Elliott |
| Estill | Fayette | Fleming | Floyd |
| Franklin | Fulton | Gallatin | Garrard |
| Grant | Graves | Grayson | Green |
| Greenup | Hancock | Hardin | Harlan |
| Harrison | Hart | Henderson | Henry |
| Hickman | Hopkins | Jackson | Jefferson |
| Jessamine | Johnson | Kenton | Knott |
| Knox | Larue | Laurel | Lawrence |
| Lee | Leslie | Letcher | Lewis |
| Lincoln | Livingston | Logan | Lyon |
| McCracken | McCreary | McLean | Madison |
| Magoffin | Marion | Marshall | Martin |
| Mason | Meade | Menifee | Mercer |
| Metcalfe | Monroe | Montgomery | Morgan |
| Muhlenberg | Nelson | Nicholas | Ohio |
| Oldham | Owen | Owsley | Pendleton |
| Perry | Pike | Powell | Pulaski |
| Robertson | Rockcastle | Rowan | Russell |
| Scott | Shelby | Simpson | Spencer |
| Taylor | Todd | Trigg | Trimble |
| Union | Warren | Washington | Wayne |
| Webster | Whitley | Wolfe | Woodford |