1850 Counties of Kentucky
| County | Description | Area in sq miles | Courts held at | Pop in 1850 |
| Adair | southern part | 800 | Columbia | 9,898 |
| Allen | southern part, water by Big Barren branch of Green river | 400 | Scottsville | 8,999 |
| Anderson | central part, on west side of Kentucky river, drained by Salt river | 170 | Lawrenceburgh | 6,260 |
| Ballard | in western most part, on south side of Ohio river, crossed by Mayfield creek | 375 | Columbus | 5,496 |
| Barren | in southernly part | 900 | Glasgow | 20,940 |
| Boone | extreme north, south side of Ohio river | 300 | Burlington | 11,125 |
| Bourbon | northern part, between KY & Licking rivers | 176 | Paris | 14,406 |
| Boyle | central part, on SW side of Dick's river | 175 | Danville | 9,116 |
| Bracken | north boundary of PA, crossed by Susquehanna river | 1,330 | Towanda | 42,829 |
| Breathitt | east part, crossed by north fork of KY river | 700 | Breathitt | 3.785 |
| Breckenridge | northern boundary, on south side of Ohio river | 760 | Hardensburgh | 10.593 |
| Bullitt | northern part, on northeastern side of Salt river | 300 | Shepnerdsville | 6,774 |
| Butler | southwest part, crossed by Green river | 570 | Morgantown | 5,754 |
| Caldwell | southwest part, on east side of Tennessee river & crossed by Cumberland river | 600 | Princeton | 13,048 |
| Callaway | southern boundary, on west side of Tennessee river | 600 | Wadesborough | 8,096 |
| Campbell | north boundary, on southern side of Ohio river | 260 | Newport | 13,127 |
| Carroll | north boundary, south side of Ohio river | 140 | Carrollton | 5,526 |
| Carter | northeast boundary, west side of Big Sandy river | 800 | Grayson | 6,241 |
| Casey | central part | 448 | Liberty | 6,556 |
| Christian | southern boundary | 621 | Hopkinsville | 9,580 |
| Clarke | northeast part, north side of Kentucky river | 300 | Winchester | 12,683 |
| Clay | southeast part | 880 | Manchester | 5,421 |
| Clinton | southern boundary | 200 | Albany | 4,889 |
| Crittenden | northwest boundry, east side of Ohio river | 540 | Marion | 6,351 |
| Cumberland | south boundary, crossed by Cumberland river | 270 | Burkesville | 7,005 |
| Daviess | northern boundary, Ohio & Green rivers | 600 | Owensborough | 12,361 |
| Edmonson | central part, crossed by Green river | 250 | Brownsville | 4,088 |
| Estill | eastern part, crossed by Kentucky river | 864 | Irvine | 5,985 |
| Fayette | northern part, Kentucky river on the south | 275 | Lexington | 22,735 |
| Fleming | north eastern part, Licking river on southwest side | 570 | Flemingsburgh | 13,916 |
| Floyd | eastern part, , crossed by west fork of Big Sandy river | 1400 | Prestonburgh | 5,714 |
| Franklin | northern part, crossed by Kentucky river | 200 | Frankfort | 12,462 |
| Fulton | southwest corner, Mississippi river on the west | blank | Hickman | 4,446 |
| Gallatin | northern boundary, Ohio river on northwest side | 175 | Warsaw | 5,137 |
| Garrard | central part, Kentucky river on north side | 240 | Lancaster | 10,237 |
| Grant | northern part | 184 | Williamstown | 6,531 |
| Grayson | western part | 800 | Litchfield | 6,837 |
| Greene | central part, crossed by Greene river | 460 | Greensburgh | 9,060 |
| Greenup | northeastern corner, Ohio river on north & northeast, Sandy river on southeast | 768 | Greenupsburgh | 9,654 |
| Hancock | northern boundary, Ohio river on northeast & northwest | 200 | Hawesville | 3,853 |
| Hardin | northern part | 1200 | Elizabethtown | 14,525 |
| Harlan | south eastern boundary, crossed by Cumberland river, Cumberland Mts form south eastern boundary & Laurel Ridge crossed northwest part | 480 | Mount Pleasant | 4,268 |
| Harrison | northern part, crossed by Licking river | 356 | Cynthiana | 13,064 |
| Hart | central part, crossed by Green river | 432 | Mumfordsville | 9,093 |
| Henderson | northwest part, Ohio river on north, Green river on east | 725 | Henderson | 12,171 |
| Henry | northern part, Kentucky river on northeast | 260 | Newcastle | 11,442 |
| Hickman | western boundary, Mississippi river on west | 350 | Clinton | 4,791 |
| Hopkins | western part, Green river on northeast | 750 | Madisonville | 12, 441 |
| Jefferson | northern part on Ohio river | 504 | Louisville | 59,829 |
| Jessamine | central part, Kentucky river on southwest | 256 | Nicholasville | 10,249 |
| Johnson | eastern part | blank | Paintsville | 3,873 |
| Kenton | northern boundary on Ohio river | 150 | Independence | 17,038 |
| Knox | southeast part, crossed by Cumberland river | 495 | Barboursville | 7,050 |
| La Rue | no description | blank | blank | 5,859 |
| Laurel | toward southeast part | 400 | London | 4,145 |
| Lawrence | eastern boundary, Big Sandy river on east | 650 | blank | 6,281 |
| Letcher | southeast boundary | 200 | Whitesburgh | 2,512 |
| Lewis | northern boundary, Ohio river on north | 375 | Clarksburgh | 7,202 |
| Lincoln | central part | 432 | Stanford | 10,093 |
| Livingston | western boundary, crossed by Cumberland river, bound by the Mississippi river on west & Tennessee river on south | 330 | Salem | 6,578 |
| Logan | southern boundary | 600 | Russellville | 16,581 |
| Madison | toward east part, Kentucky river on north | 520 | Richmond | 15,727 |
| Marion | central part | 276 | Lebanon | 11,765 |
| Marshall | western part, Tennessee river on northeast | not listed | Benton | 5,269 |
| Mason | northern boundary, Ohio river on north | 260 | Washington | 18,344 |
| McCracken | northwestern boundary, Ohio river on the north, Tennessee river on northeast | 200 | Paducah | 6,067 |
| Mead | northern boundary, Ohio river on north | 360 | Brandenburgh | 7,393 |
| Mercer | central part, Kentucky river on northeast | 350 | Harrisburgh | 17,067 |
| Monroe | southern boundary, crossed by Cumberland river | 375 | Tompkinsville | 7,756 |
| Montgomery | toward northeast part | 260 | Mount Sterling | 9,903 |
| Morgan | eastern part, crossed by Licking river | 890 | West Liberty | 7,620 |
| Muhlenburgh | western part, Green river on northeast | 490 | Greenville | 9,809 |
| Nelson | toward north part | 460 | Bardstown | 14,789 |
| Nicholas | in northeast part, crossed by Licking river | 350 | Carlisle | 10,361 |
| Ohio | western part, Green river on southwest | 576 | Hartford | 9,479 |
| Oldham | northern boundary, Ohio river on northwest | 220 | Westport | 7,629 |
| Owen | north part, Kentucky river on southwest | 320 | Owenton | 10,444 |
| Owsley | eastern part, crossed by Kentucky river | blank | Booneville | 3,774 |
| Pendleton | northeast boundary, Ohio river on northeast, crossed by Licking river | 450 | Falmouth | 6,774 |
| Perry | southeast part | 760 | Perry | 3,092 |
| Pike | east part, Big Sandy river on northeast | 400 | Piketon | 5,365 |
| Pulaski | southeast part, crossed by Cumberland river | 800 | Somerset | 14,195 |
| Rock Castle | toward southeast part | 330 | Mount Vernon | 4,697 |
| Russell | south part, crossed by Cumberland river | 260 | Jamestown | 5,349 |
| Scott | northern part | 252 | Georgetown | 14,946 |
| Shelby | northern part | 442 | Shelbyville | 17,095 |
| Simpson | south boundary | 288 | Franklin | 7,733 |
| Spencer | toward northern part | 260 | Taylorville | 6,842 |
| Taylor | central part | blank | Campbellsville | 7,250 |
| Todd | on southwest boundary | 612 | Elkton | 8,680 |
| Trigg | on southern boundary, Tennessee river on west, crossed by Cumberland river | 510 | Cadiz | 10,129 |
| Trimble | on northwestern boundary, Ohio river on northwest | 150 | Bedford | 5,963 |
| Union | northwestern boundary, Ohio river on northwest | 450 | Morganfield | 9,012 |
| Warren | in southern part, crossed by Big Barren river | 612 | Bowling Green | 15,123 |
| Washington | in central part | 475 | Springfield | 12,194 |
| Wayne | on southern boundary, Cumberland river on north | 570 | Monticello | 8,692 |
| Whitley | south boundary, crossed by Cumberland river | 600 | Whitley Court House | 7,447 |
| Woodford | toward north part, Kentucky river on southwest | 154 | Versailles | 12,423 |