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Pennsylvania counties - dates of creation, parent county or counties
The Following is a list of Pennsylvania counties, with their dates
of creation, and the parent county or counties:
| Adams |
1800 |
York |
| Allegheny |
1788 |
Westmoreland, Washington |
| Armstrong |
1800 |
Allegheny, Lycoming, Westmoreland |
| Beaver |
1800 |
Allegheny, Washington |
| Bedford |
1710 |
Cumberland |
| Berks |
1752 |
Chester, Lancaster, Philadelphia |
| Blair |
1846 |
Huntington, Bedford |
| Bradford |
1810 |
Luzerne, Lycoming (name changed to Ontario in 1812) |
| Bucks |
1682 |
original county |
| Butler |
1800 |
Allegheny |
| Cambria |
1804 |
Somerset, Bedford, Huntingdon |
| Cameron |
1860 |
Clinton, Elk, McKean, Potter |
| Carbon |
1843 |
Northampton, Monroe |
| Centre |
1800 |
Lycoming, Mifflin, Northumberland, Huntingdon |
| Chester |
1682 |
original county |
| Clarion |
1839 |
Venango, Armstrong |
| Clearfield |
1804 |
Huntingdon, Lycoming |
| Clinton |
1839 |
Lycoming, Centre |
| Columbia |
1813 |
Northumberland |
| Crawford |
1800 |
Allegheny |
| Cumberland |
1750 |
Lancaster |
| Dauphin |
1785 |
Lancaster |
| Delaware |
1789 |
Chester |
| Elk |
1843 |
Jefferson, McKean, Clearfield |
| Erie |
1800 |
Allegheny |
| Fayette |
1783 |
Westmoreland |
| Forest |
1848 |
Jefferson, and 1866 from Venango |
| Franklin |
1784 |
Cumberland |
| Fulton |
1850 |
Bedford |
| Greene |
1796 |
Washington |
| Huntingdon |
1787 |
Bedford |
| Indiana |
1803 |
Westmoreland, Lycoming |
| Jefferson |
1804 |
Lycoming |
| Juniata |
1831 |
Mifflin |
| Lackawanna |
1878 |
Luzerne |
| Lancaster |
1729 |
Chester |
| Lawrence |
1849 |
Beaver, Mercer |
| Lebanon |
1813 |
Dauphin, Lancaster |
| Lehigh |
1812 |
Northampton |
| Luzerne |
1786 |
Northumberland |
| Lycoming |
1795 |
Northumberland |
| Mckean |
1804 |
Lycoming |
| Mercer |
1800 |
Allegheny |
| Mifflin |
1789 |
Cumberland, Northumberland |
| Monroe |
1836 |
Pike, Horthampton |
| Montgomery |
1784 |
Philadelphia |
| Montour |
1850 |
Columbia |
| Northampton |
1752 |
Bucks |
| Northumberland |
1772 |
Lancaster, Bedford, Berks, Northampton, Cumberland |
| Ontario (see Bradford) |
| Perry |
1820 |
Cumberland |
| Philadelphia |
1682 |
original county |
| Pike |
1814 |
Wayne |
| Potter |
1804 |
Lycoming |
| Schuylkill |
1811 |
Berks, Northampton and 1818 from Columbia and Luzerne |
| Snyder |
1855 |
Union |
| Somerset |
1795 |
Bedford |
| Sullivan |
1847 |
Lycoming |
| Susquehanna |
1810 |
Luzerne |
| Tioga |
1804 |
Lycoming |
| Union |
1813 |
Northumberland |
| Venango |
1800 |
Allegheny, Lycoming |
| Warren |
1800 |
Allegheny, Lycoming |
| Washington |
1781 |
Westmoreland |
| Wayne |
1798 |
Northampton |
| Westmoreland |
1773 |
Bedford |
| Wyoming |
1842 |
Luzerne |
| York |
1749 |
Lancaster |
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