- ADAMSTOWN Borough, formed 1850 from East Cocalico Twp.
- AKRON Borough, formed 1895 from Ephrata Twp.
- BART Twp., formed 1744 from Sadsbury Twp.
- BRECKNOCK Twp., formed 1740
- CAERNARVON Twp., original township
- CHRISTIANA Borough, formed 1894 from Sadsbury Twp.
- CLAY Twp., formed 1853 from Elizabeth Twp.
- COLERAIN Twp., formed 1738 from Drumore Twp.
- COLUMBIA Borough, formed 1814 from Hempfield Twp.
- CONESTOGA Twp., original Twp.
- CONOY Twp., formed 1842 from West Donegal Twp.
- DENVER Borough, formed 1900 from East Cocalico Twp.
- DRUMORE Twp., origina Twp.
- EARL Twp., original Twp.
- EAST COCALICO Twp., formed 1838 from Cocalico Twp.
- EAST DONEGAL Twp., formed 1838 from Donegal Twp.
- EAST DRUMORE Twp., formed 1886 from Durmore Twp.
- EAST EARL Twp., formed 1851 from Earl Twp.
- EAST HEMPFIELD Twp., formed 1818 from Hempfield Twp.
- EAST LAMPETER Twp., formed 1841 from Lampeter Twp.
- EAST PETERSBURG Borough, formed 1946 from East Hempfield Twp.
- EDEN Twp., formed 1855 from Bart Twp.
- ELIZABETH Twp., formed 1757 from Warwick Twp.
- ELIZABETHTOWN Borough, formed 1872 from West Donegal
and Mount Joy Twp.
- EPHRATA Borough, formed 1891 from Ephrata Twp.
- EPHRATA Twp., formed 1838 from Cocalico Twp.
- FULTON Twp., formed 1844 from Little Britain Twp.
- LANCASTER City, formed as a borough in 1742 and became a city 1818,
from Lancaster Twp.
- LANCASTER Twp., original township
- LEACOCK Twp., original township
- LITITZ Borough, formed 1888 from Warwick Twp.
- LITTLE BRITAIN Twp., formed 1738 from Drumore Twp.
- MANHEIM Borough, formed 1838 from Rapho Twp.
- MANHEIM Twp., original Twp.
- MANOR Twp., formed 1759 from Hempfield Twp.
- MARIETTA Borough, formed 1812 from Donegal Twp.
- MARTIC Twp., original township
- MILLERSVILLE Borough, formed 1932 from Manor Twp.
- MOUNT JOY Borough, formed 1851 from Mount Joy and East Donegal Twp.
- MOUNT JOY Twp., formed 1759 from Donegal Twp.
- MOUNTVILLE Borough, formed 1906 from West Hempfield Twp.
- NEW HOLLAND Borough, formed 1895 from Earl Twp.
- PARADISE Twp., formed 1843 from Strasburg Twp.
- PENN Twp., formed 1846 from Warwick Twp.
- PEQUEA Twp., formed 1853 from Conestoga Twp.
- PROVIDENCE Twp., formed 1853 from Martic Twp.
- QUARRYVILLE Borough, formed 1892 from Eden and East Drumore Twp.
- RAPHO Twp., formed 1741 from Donegal Twp.
- SADSBURY Twp., original township
- SALISBURY Twp, original township
- STRASBURG Borough, formed 1816 from Strasburg Twp.
- STRASBURG Twp., formed 1759 from Leacock Twp.
- TERRE HILL Borough, formed 1908 from East Earl Twp.
- UPPER LEACOCK Twp., formed 1843 from Leacock Twp.
- WARWICK Twp., original township
- WASHINGTON Borough, formed 1827 from Manor Twp. and returned to
village status in 1973
- WEST COCALICO Twp., formed 1838 from Cocalico Twp.
- WEST DONEGAL Twp., formed 1838 from Donegal Twp.
- WEST EARL Twp., formed 1833 from Earl Twp.
- WEST HEMPFIELD Twp., formed 1818 from Hempfield Twp.
- WEST LAMPETER Twp., formed 1841 from Lampeter Twp.
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