Tennessee County Formation
| Name | Date Created | Parent County or Territory |
| Anderson | 1801 | Knox |
| Bedford | 1807-8 | Rutherford |
| Benton | 1835 | Henry, Humphreys |
| Bledsoe | 1807 | Roane |
| Blount | 1795 | Knox |
| Bradley | 1836 | Indian Lands |
| Campbell | 1806 | Anderson, Claiborne |
| Cannon | 1836 | Coffee, Warren, Wilson |
| Carroll | 1821 | Western District |
| Carter | 1796 | Washington |
| Cheatham | 1856 | Davidson, Dickson, |
| � | � | Montgomery |
| Chester | 1875 | Hardeman, Henderson, |
| � | � | Madison, McNairy |
| Claiborne | 1801 | Grainger, Hawkins |
| Clay | 1870 | Jackson, Overton |
| Cocke | 1797 | Jefferson |
| Coffee | 1836 | Bedford, Franklin, Warren |
| Crockett | 1845 | Dyer, Gibson, Madison |
| � | � | Haywood |
| Cumberland | 1856 | Bledsoe, Morgan, Roane |
| Davidson | 1783 | Washington |
| Decatur | 1845 | Perry |
| Dekalb | 1837-38 | Cannon, Warren, White |
| Dickson | 1803 | Montgomery, Robertson |
| Dyer | 1823 | Western District |
| Fayette | 1824 | Hardeman, Shelby |
| Fentress | 1823 | Morgan, Overton |
| Franklin | 1807 | Bedford, Warren |
| Gibson | 1823 | Western District |
| Giles | 1809 | Maury |
| Grainger | 1796 | Hawkins, Knox |
| Greene | 1783 | Washington |
| Grundy | 1844 | Coffee, Warren |
| Hamblin | 1870 | Grainger, Hawkins |
| Hamilton | 1819 | Rhea |
| Hancock | 1844 | Claiborne, Hawkins |
| Haredeman | 1823 | Western District |
| Hardin | 1819 | Western District |
| Hawkins | 1786 | Sullivan |
| Haywood | 1823 | Western District |
| Henderson | 1821 | Western District |
| Henry | 1821 | Western District |
| Hickman | 1807 | Dickson |
| Houston | 1871 | Dickson, Stewart |
| Humphreys | 1809 | Stewart, Smith |
| Jackson | 1801 | Smith |
| Jefferson | 1792 | Greene, Hawkins |
| Johnson | 1836 | Carter |
| Knox | 1792 | Greene, Hawkins |
| Lake | 1870 | Obion |
| Lauderdale | 1835 | Dyer, Tipton |
| Lawrence | 1817 | Hickman, Maury |
| Lewis | 1843 | Hickman, Maury, Wayne, |
| � | � | Lawrence |
| Lincoln | 1809 | Bedford |
| Loudon | 1870 | Blount, Monroe, Roane, |
| � | � | McMinn |
| Macon | 1842 | Smith, Sumner |
| Madison | 1821 | Western District |
| Marion | 1817 | Indian Lands |
| Marshall | 1826 | Bedford, Giles, Lincoln, |
| � | � | Maury |
| Maury | 1807 | Williamson |
| McMinn | 1819 | Indian Lands |
| McNairy | 1823 | Hardin |
| Meigs | 1836 | Hamilton, McMinn, Rhea |
| Monroe | 1819 | Roane |
| Montgomery | 1796 | Tennessee |
| Moore | 1871 | Bedford, Franklin |
| Morgan | 1817 | Roane |
| Obion | 1823 | Western District |
| Overton | 1806 | Jackson |
| Perry | 1818 | Hickman |
| Pickett | 1879 | Fentress, Overton |
| Polk | 1839 | Bradley, McMinn |
| Putnam | 1842 | DeKalb, Jackson, White, |
| � | � | Overton |
| Rhea | 1807 | Roane |
| Roane | 1801 | Blount, Knox |
| Robertson | 1796 | Tennessee |
| Rutherford | 1803 | Davidson |
| Scott | 1849 | Anderson, Fentress, Morgan |
| Sequatchie | 1857 | Hamilton |
| Sevier | 1794 | Jefferson |
| Shelby | 1819 | Hardin |
| Smith | 1799 | Sumner |
| Stewart | 1803 | Montgomery |
| Sullivan | 1779 | Washington |
| Sumner | 1786 | Davidson |
| Tipton | 1823 | Western District |
| Trousdale | 1870 | Macon, Smith, Wilson |
| Unicoi | 1875 | Carter, Washington |
| Union | 1850 | Anderson, Campbell, Knox, |
| � | � | Claiborne, Grainger |
| Van Buren | 1840 | Bledsoe, Warren, White |
| Warren | 1807 | White |
| Washington | 1777 | Covered all of Tennessee |
| � | � | No parent county |
| Wayne | 1817 | Hickman |
| Weakley | 1823 | Western District |
| White | 1806 | Jackson, Overton, Smith |
| Williamson | 1799 | Davidson |
| Wilson | 1799 | Sumner |