| Township |
Formed |
| Armstrong |
1784 or 1785 |
| Banks |
1868 from Canoe Township |
| Black Lick |
1807 from Armstrong Township |
| Brush Valley |
1835 from Wheatfield Township |
| Buffington |
1867 from Pine Township |
| Burrell |
1853 from Black Lick Township |
| Canoe |
1847 from Montgomery Township |
| Center |
1807 from Armstrong Township |
| Cherry Hill |
1844 or 1854 from Brush Valley Township |
| Conemaugh |
1803 or 1807 from Armstrong Township |
| East Mahoning |
1845 or 1846 from Mahoning Township |
| East Wheatfield |
1859 from Wheatfield Township |
| Grant |
1868 from Montgomery Township |
| Greene |
1816 from Wheatfield Township |
| Montgomery |
1834 from Mahoning Township |
| North Mahoning |
1845 from Mahoning Township |
| Pine |
1850 |
| Rayne |
1847 from Washington and Green Townships |
| South Mahoning |
1845 or 1846 from Mahoning Township |
| Washington |
1823 or 1807 from Armstrong Township |
| West Mahoning |
1845 or 1846 from Mahoning Township |
| West Wheatfield |
1859 from Wheatfield Township |
| White |
1843 from Center, Washington, Greene and Armstrong
Townships |
| Young |
1830 from Black Lick and Conemaugh Townships |
