Kentucky’s counties did not appear all at once. Before statehood, the region was part of Virginia, and its early boundaries shifted repeatedly as new counties were carved from older ones. Understanding when a county was formed—and what earlier county it belonged to—can be essential when tracking down records that pre-date the current boundaries. For a full overview of how Kentucky evolved from Virginia territory into its present shape, see the Kentucky Formation History.
County research is also shaped by where people actually lived and worked. Post offices often reveal population centers, name changes, and shifting communities. To explore where mail routes and settlements existed in the late nineteenth century, visit Kentucky Post Offices in 1870.
The sections below outline each county’s formation history along with any known courthouse disasters that may affect the availability of early records. Visit the County Selection page to visit that county site.
Individual County Formations & Courthouse Disasters
| County | Date Formed | Parent County | County Seat | Approx. Year of Disaster |
|---|---|---|---|---|
| Adair | 1801 | Green | Columbia | |
| Allen | 1815 | Barren, Warren | Scottsville | 1902 |
| Anderson | 1827 | Franklin, Mercer, Washington | Lawrenceburg | 1859, 1915 |
| Ballard | 1842 | Hickman, McCracken | Wickliffe | 1880 |
| Barren | 1798 | Green, Warren | Glasgow | |
| Bath | 1811 | Montgomery | Owingsville | 1864 |
| Bell | 1867 | Knox, Harlan | Pineville | 1914, 1918, 1944, 1976 |
| Boone | 1798 | Campbell | Burlington | 1880s |
| Bourbon | 1785 | Fayette | Paris | 1872, 1901 |
| Boyd | 1860 | Carter, Lawrence, Greenup | Catlettsburg | |
| Boyle | 1842 | Mercer, Lincoln | Danville | 1860 |
| Bracken | 1796 | Campbell, Mason | Brooksville | 1848 |
| Breathitt | 1839 | Clay, Estill, Perry | Jackson | 1866, 1873 |
| Breckinridge | 1799 | Hardin | Hardinsburg | 1958 |
| Bullitt | 1796 | Jefferson, Nelson | Shepherdsville | |
| Butler | 1810 | Logan, Ohio | Morgantown | 1872 |
| Caldwell | 1809 | Livingston | Princeton | 1864 |
| Calloway | 1822 | Hickman | Murray | 1906 |
| Campbell | 1795 | Harrison, Mason, Scott | Alexandria & Newport | |
| Carlisle | 1886 | Graves, Ballard | Bardwell | 1980 |
| Carroll | 1838 | Gallatin, Henry, Trimble | Carrollton | |
| Carter | 1838 | Greenup, Lawrence | Grayson | |
| Casey | 1806 | Lincoln | Liberty | |
| Christian | 1797 | Logan | Hopkinsville | 1864 |
| Clark | 1792 | Bourbon, Fayette | Winchester | |
| Clay | 1806 | Madison, Floyd, Knox | Manchester | 1936 |
| Clinton | 1835 | Wayne, Cumberland | Albany | 1864, 1980 |
| Crittenden | 1842 | Livingston | Marion | 1865, 1870 |
| Cumberland | 1796 | Green | Burkesville | 1826, 1865, 1933 |
| Daviess | 1815 | Ohio | Owensboro | 1865 |
| Edmonson | 1825 | Grayson, Hart, Warren | Brownsville | |
| Elliott | 1869 | Carter, Lawrence, Morgan | Sandy Hook | 1957 |
| Estill | 1808 | Clark, Madison | Irvine | 1864 |
| Fayette | 1780 | Kentucky Co., VA | Lexington | 1803, 1897 |
| Fleming | 1798 | Mason | Flemingsburg | |
| Floyd | 1799 | Fleming, Mason, Montgomery | Prestonsburg | 1808 |
| Franklin | 1794 | Woodford, Mercer, Shelby | Frankfort | 1995 |
| Fulton | 1845 | Hickman | Hickman | |
| Gallatin | 1798 | Franklin, Shelby | Warsaw | |
| Garrard | 1796 | Madison, Lincoln, Mercer | Lancaster | |
| Grant | 1820 | Pendleton | Williamstown | |
| Graves | 1823 | Hickman | Mayfield | 1864, 1887 |
| Grayson | 1810 | Hardin, Ohio | Leitchfield | 1864, 1896 |
| Green | 1792 | Lincoln, Nelson | Greensburg | |
| Greenup | 1803 | Mason | Greenup | 1937 |
| Hancock | 1828 | Daviess, Ohio, Breckinridge | Hawesville | |
| Hardin | 1792 | Nelson | Elizabethtown | 1864, 1932 |
| Harlan | 1819 | Knox | Harlan | 1863 |
| Harrison | 1793 | Bourbon, Scott | Cynthiana | 1851, 1997 |
| Hart | 1819 | Hardin, Barren, poss. Green | Munfordville | 1928 |
| Henderson | 1798 | Christian | Henderson | |
| Henry | 1798 | Shelby | New Castle | 1804 |
| Hickman | 1821 | Caldwell, Livingston | Clinton | |
| Hopkins | 1806 | Henderson | Madisonville | 1829, 1864 |
| Jackson | 1858 | Rockcastle, Owsley, Madison, Clay, Estill, Laurel | McKee | 1949 |
| Jefferson | 1780 | Kentucky Co., VA | Louisville | 1905 |
| Jessamine | 1798 | Fayette | Nicholasville | |
| Johnson | 1843 | Floyd, Morgan, Lawrence | Paintsville | |
| Kenton | 1840 | Campbell | Independence Covington | |
| Knott | 1884 | Perry, Breathitt, Floyd, Letcher | Hindman | 1929 |
| Knox | 1799 | Lincoln | Barbourville | |
| LaRue | 1843 | Hardin | Hodgenville | 1865 |
| Laurel | 1825 | Whitley, Clay, Knox, Rockcastle | London | 1958 |
| Lawrence | 1821 | Floyd, Greenup | Louisa | |
| Lee | 1870 | Owsley, Breathitt, Wolfe, Estill | Beattyville | |
| Leslie | 1878 | Clay, Harlan, Perry | Hyden | |
| Letcher | 1842 | Perry, Harlan | Whitesburg | |
| Lewis | 1806 | Mason | Vanceburg | |
| Lincoln | 1780 | Kentucky Co., VA | Stanford | |
| Livingston | 1798 | Christian | Smithland | |
| Logan | 1792 | Lincoln | Russellville | |
| Lyon | 1854 | Caldwell | Eddyville | |
| Madison | 1785 | Lincoln | Richmond | |
| Magoffin | 1860 | Floyd, Johnson, Morgan | Salyersville | 1957 |
| Marion | 1834 | Washington | Lebanon | 1863 |
| Marshall | 1842 | Calloway | Benton | 1888, 1914 |
| Martin | 1870 | Lawrence, Floyd, Pike, Johnson | Inez | 1892 |
| Mason | 1788 | Bourbon | Maysville | |
| McCracken | 1824 | Hickman | Paducah | |
| McCreary | 1912 | Wayne, Pulaski, Whitley | Whitley City | 1927, 1951 |
| McLean | 1854 | Muhlenberg, Daviess, Ohio | Calhoun | |
| Meade | 1824 | Hardin, Breckinridge | Brandenburg | 1974 |
| Menifee | 1869 | Powell, Wolfe, Bath, Morgan, Montgomery | Frenchburg | |
| Mercer | 1785 | Lincoln | Harrodsburg | 1928 |
| Metcalfe | 1860 | Monroe, Adair, Barren, Cumberland, Green | Edmonton | 1865, 1867 |
| Monroe | 1820 | Barren, Cumberland | Tompkinsville | 1863, 1887 |
| Montgomery | 1796 | Clark | Mount Sterling | 1851, 1863 |
| Morgan | 1822 | Floyd, Bath | West Liberty | 1862, 1925 |
| Muhlenberg | 1798 | Christian, Logan | Greenville | |
| Nelson | 1784 | Jefferson | Bardstown | |
| Nicholas | 1799 | Bourbon, Mason | Carlisle | |
| Ohio | 1799 | Hardin | Hartford | 1864 |
| Oldham | 1823 | Henry, Shelby, Jefferson | LaGrange | 1873 |
| Owen | 1819 | Scott, Franklin, Gallatin, Pendleton | Owenton | |
| Owsley | 1843 | Clay, Estill, Breathitt | Booneville | 1929, 1967 |
| Pendleton | 1798 | Bracken, Campbell | Falmouth | 1997 |
| Perry | 1820 | Clay, Floyd | Hazard | 1885, 1911 |
| Pike | 1821 | Floyd | Pikeville | 1977 |
| Powell | 1852 | Clark, Estill, Montgomery | Stanton | 1863, 1864 |
| Pulaski | 1798 | Green, Lincoln | Somerset | 1838, 1871 |
| Robertson | 1867 | Nicholas, Bracken, Mason, Fleming, Harrison | Mt. Olivet | |
| Rockcastle | 1810 | Pulaski, Lincoln, Madison | Mount Vernon | 1871 |
| Rowan | 1856 | Fleming, Morgan | Morehead | 1864, 1880s |
| Russell | 1825 | Cumberland, Adair, Wayne | Jamestown | 1976 |
| Scott | 1792 | Woodford | Georgetown | 1837, 1876 |
| Shelby | 1792 | Jefferson | Shelbyville | |
| Simpson | 1819 | Allen, Logan, Warren | Franklin | 1882 |
| Spencer | 1824 | Shelby, Bullitt, Nelson | Taylorsville | 1865, 1914 |
| Taylor | 1848 | Green | Campbellsville | 1864 |
| Todd | 1819 | Christian, Logan | Elkton | |
| Trigg | 1820 | Christian, Caldwell | Cadiz | 1864, 1892, 1920 |
| Trimble | 1836 | Henry, Oldham, Gallatin | Bedford | 1952 |
| Union | 1811 | Henderson | Morganfield | |
| Warren | 1796 | Logan | Bowling Green | 1864 |
| Washington | 1792 | Nelson | Springfield | 1795, 1814 |
| Wayne | 1800 | Pulaski, Cumberland | Monticello | 1898 |
| Webster | 1860 | Hopkins, Union, Henderson | Dixon | |
| Whitley | 1818 | Knox | Williamsburg | 1930 |
| Wolfe | 1860 | Owsley, Breathitt, Powell, Morgan | Campton | 1886, 1913 |
| Woodford | 1788 | Fayette | Versailles | 1965 |