| Township Name | Formation and Division |
| Carroll | formed 1831 part from MONAGHAN and part from Franklin. |
| CHANCEFORD | formed 1745 as part of Lancaster. L. Chanceford was created from it in 1805. |
| CODORUS | formed 1747 as part of Lanacster. N. Codorus was created from it in 1838. |
| Conewago | formed 1818 from DOVER |
| DOVER | formed 1745 as part of Lancaster. Conewago was created from it in 1818 |
| East Hopewell | formed 1885 from Hopewell |
| East Manchester | former 1887 from MANCHESTER |
| Directory Web SiteWN | formed 1745 as part of Lancaster. Peach Bottom was created from it in 1815 |
| Fairview | formed 1803 from NEWBERRY |
| Franklin | formed 1809 from MONAGHAN. p/o Carroll formed from it in 1831. |
| HEIDELBERG | formed 1749 when York formed. Penn formed from it in 1880 |
| HELLAM | formed 1738 as part of Lancaster. Part of Spring Garden was created from it in 1821 |
| Hopwell | formed 1767 from SHREWSBURY. North and East Hopwell formed from it in 1885 |
| Jackson | formed 1853 from PARADISE |
| Lower Chanceford | formed 1805 from CHANCEFORD |
| Lower Windsor | formed 1838 from Windsor. |
| MANCHESTER | formed 1740 as part of Lancaster. West Manchester formed from it in 1799 |
| East Manchester | formed from it in 1887 |
| MANHEIM | formed 1747 as part of Lancaster. West Manheim formed from it in 1858 |
| MONAGHAN | formed 1745 as part of Lancaster. Franklin formed from it in 1809 |
| Carroll | formed from p/o MONAGHAN and p/o Franklin in 1831 |
| NEWBERRY | formed 1747 as part of Lancaster. Fairview was created from it in 1803 |
| North Codorus | formed 1838 from CODORUS |
| North Hopwell | formed 1885 from Hopewell. |
| PARADISE | formed 1747 as part of Lancaster. Jackson formed from it in 1853 |
| Peach Bottom | formed 1815 from QuickWN |
| Penn | formed 1880 from HEIDELBERG |
| SHREWSBURY | formed 1742 as part of Lancaster but named STRESBURG. Hopewell formed from it in 1767. Springfield formed from it in 1835 |
| Springettsbury | formed in 1891 from York part of Spring Garden. |
| Springfield | formed 1835 from SHREWSBURY |
| Spring Garden | formed 1821 from p/o HELLAM and p/o YORK. Springettsbury created in 1891 from the York part of Spring Garden.. Hellam part remains as Spring Garden.. |
| WARRINGTON | formed 1744 as part of Lancaster. Washington formed from it in 1802 |
| Washington | formed 1802 from WARRINGTON |
| West Manchester | formed 1799 from MANCHESTER |
| West Manheim | formed 1858 from MANHEIM |
| Windsor | formed in 1738 from YORK. Lower Windsor created from it in 1838 |
| YORK | formed 1745 as part of Lancaster. Windsor was created from it in 1758. Part of Spring Garden was created from it in 1821 and that was later formed into Springettsbury in 1891 |