Pennsylvania County Map Formation by Year
1673
1674
1678
1680
1681
1682
1687
1704
1729
1749
1750
1751
1752
1771
1772
1773
1774
1775
1776
1779
1781
1782
1783
1784
1785
1786
1787
1788
1789
1792
1795
1796
1798
1800
1802
1803
1804
1805
1806
1807
1808
1810
1811
1812
1813
1814
1815
1816
1818
1819
1820
1821
1822
1823
1826
1830
1831
1834
1835
1836
1839
1840
1843
1845
1846
1847
1848
1849
1850
1853
1854
1855
1857
1860
1861
1865
1866
1867
1868
1870
1878
Pennsylvania County Map Abbreviations
unorg. = unorganized
g. = gained
w. = with
fr. = from
atmt. = attachment
exch = exchanged
nca.= non county area
ch. = changed
Ad -
Adams
Al -
Allegheny
Ar -
Armstrong
Bea -
Beaver
Bed -
Bedford
Ber -
Berks
Bl -
Blair
Br -
Bradford
Buc -
Bucks
But -
Butler
Car -
Carbon
Cbr -
Cambria
Cen -
Centre
Ch -
Chester
Cla -
Clarion
Cle -
Clearfield
Cli -
Clinton
Co -
Columbia
Cr -
Crawford
Crn -
Cameron
Cu -
Cumberland
Da -
Dauphin
De -
Delaware
Elk -
Elk
Er -
Erie
Fa -
Fayette
Fo -
Forest
Fr -
Franklin
Fu -
Fulton
Gr -
Greene
Hu -
Huntingdon
In -
Indiana
Je -
Jefferson
Ju -
Juniata
Lac -
Lackawanna
Lan -
Lancaster
Law -
Lawrence
Leb -
Lebanon
Leh -
Lehigh
Lu -
Luzerne
Ly -
Lycoming
McK -
McKean
Me -
Mercer
Mi -
Mifflin
Mro -
Monroe
Mtr -
Montour
Mty -
Montgomery
Nhn -
Northampton
Nud -
Northumberland
Pe -
Perry
Ph -
Philadelphia
Pi -
Pike
Po -
Potter
Sc -
Schuylkill
Sn -
Snyder
So -
Somerset
Sul -
Sullivan
Sus -
Susquehanna
Ti -
Tioga
Un -
Union
Ve -
Venango
War -
Warren
Was -
Washington
Way -
Wayne
We -
Westmoreland
Wy -
Wyoming
Yor -
York