County |
Created
in |
Created
from |
County
Seat |
| Adams |
1800 |
York |
Gettysburg |
| Allegheny |
1786 |
Washington
Westmoreland |
Pittsburgh |
| Armstrong |
1800 |
Allegheny
Lycoming
Westmoreland |
Kittanning |
| Beaver |
1800 |
Allegheny
Washington |
Beaver |
| Bedford |
1771 |
Cumberland |
Bedford |
| Berks |
1752 |
Chester
Lancaster
Philadelphia |
Reading |
| Blair |
1846 |
Bedford
Huntingdon |
Hollidaysburg |
| Bradford |
1810 |
Luzerne
Lycoming |
Towanda |
| Bucks |
1682 |
Original
County |
Doylestown |
| Butler |
1800 |
Allegheny |
Butler |
| Cambria |
1804 |
Bedford
Huntingdon
Somerset |
Ebensburg |
| Cameron |
1860 |
Clinton
Elk
McKean
Potter |
Emporium |
| Carbon |
1843 |
Monroe
Northampton |
Jim
Thorpe |
| Centre |
1800 |
Huntingdon
Lycoming
Mifflin
Northumberland |
Bellefonte |
| Chester |
1682 |
Original
County |
West
Chester |
| Clarion |
1839 |
Armstrong
Venango |
Clarion |
| Clearfield |
1804 |
Huntingdon
Lycoming |
Clearfield |
| Clinton |
1839 |
Centre
Lycoming |
Lock
Haven |
| Columbia |
1813 |
Northumberland |
Bloomsburg |
| Crawford |
1800 |
Allegheny |
Meadville |
| Cumberland |
1750 |
Lancaster |
Carlisle |
| Dauphin |
1785 |
Lancaster |
Harrisburg |
| Delaware |
1789 |
Chester |
Media |
| Elk |
1843 |
Clearfield
Jefferson
McKean |
Ridgeway |
| Erie |
1800 |
Allegheny
Crawford |
Erie |
| Fayette |
1783 |
Westmoreland |
Uniontown |
| Forest |
1848 |
Jefferson
Venango |
Tionesta |
| Franklin |
1784 |
Cumberland |
Chambersburg |
| Fulton |
1850 |
Bedford |
McConnellsburg |
| Greene |
1796 |
Washington |
Waynesburg |
| Huntingdon |
1787 |
Bedford |
Huntingdon |
| Indiana |
1803 |
Lycoming
Westmoreland |
Indiana |
| Jefferson |
1804 |
Lycoming |
Brookville |
| Juniata |
1831 |
Mifflin |
Mifflintown |
| Lackawanna |
1878 |
Luzerne |
Scranton |
| Lancaster |
1729 |
Chester |
Lancaster |
| Lawrence |
1849 |
Beaver
Mercer |
New
Castle |
| Lebanon |
1813 |
Dauphin
Lancaster |
Lebanon |
| Lehigh |
1812 |
Northampton |
Allentown
Lehigh County Courthouse
455 Hamilton St
Allentown, PA 18102
Lehigh County Historical
Society
501 Hamilton St.
Allentown, PA 18102
610-435-1074 |
| Luzerne |
1786 |
Northumberland |
Wilkes-Barre |
| Lycoming |
1795 |
Northumberland |
Williamsport |
| McKean |
1804 |
Lycoming |
Smethport |
| Mercer |
1800 |
Allegheny
Crawford |
Mercer |
| Mifflin |
1789 |
Cumberland
Northumberland |
Lewistown |
| Monroe |
1836 |
Northampton
Pike |
Stroudsburg |
| Montgomery |
1784 |
Philadelphia |
Norristown |
| Montour |
1850 |
Columbia |
Danville |
| Northampton |
1752 |
Bucks |
Easton
Northampton County
Courthouse
7th & Washington Sts.
Easton, PA 18042
610-559-3000
Northampton County
Historical & Genealogical Society
101 S. 4th St
Easton, PA 18042
610-253-1222 |
| Northumberland |
1772 |
Bedford
Berks
Cumberland
Lancaster
Northampton |
Sunbury |
| Perry |
1820 |
Cumberland |
New
Bloomfield |
| Philadelphia |
1682 |
Original
County |
Philadelphia |
| Pike |
1814 |
Wayne |
Milford |
| Potter |
1804 |
Lycoming |
Coudersport |
| Schuylkill |
1811 |
Berks
Northampton |
Pottsville |
| Snyder |
1855 |
Union |
Middleburg |
| Somerset |
1795 |
Bedford |
Somerset |
| Sullivan |
1847 |
Lycoming |
Laporte |
| Susquehanna |
1810 |
Luzerne |
Montrose |
| Tioga |
1804 |
Lycoming |
Wellsboro |
| Union |
1813 |
Northumberland |
Lewisburg |
| Venango |
1800 |
Allegheny
Crawford
Lycoming |
Franklin |
| Warren |
1800 |
Allegheny
Crawford
Lycoming
Venango |
Warren |
| Washington |
1781 |
Westmoreland |
Washington |
| Wayne |
1798 |
Northampton |
Honesdale |
| Westmoreland |
1773 |
Bedford |
Greensburg |
| Wyoming |
1842 |
Luzerne |
Tunkhannock |
| York |
1749 |
Lancaster |
York |