Pennsylvania County Creation Dates and Parent Counties

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(Difference between revisions)
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| '''Year Split and Child County'''<br>
 
| '''Year Split and Child County'''<br>
 
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| valign="top" | [[Adams County, Pennsylvania|Adams]]
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| valign="top" |  
| valign="top" | 1800<br>
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| valign="top" |  
| valign="top" | York
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| valign="top" |  
| valign="top" | &nbsp;--<br>
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| valign="top" |  
 
|-
 
|-
| [[Allegheny County, Pennsylvania|Allegheny]]
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| valign="top" |  
| 1788
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| valign="top" |
| Washington, Westmoreland
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| valign="top" |
| In 1800 parts of Armstrong, Beaver, Venango, and Warren counties and all of Butler, Crawford, Erie, and Mercer counties came from Allegheny Co.
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| valign="top" |
 
|-
 
|-
| style="vertical-align: top" | [[Armstrong County, Pennsylvania|Armstrong]]
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| valign="top" |  
| style="vertical-align: top" | 1800<br>
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| valign="top" |  
| style="vertical-align: top" | <font face="Arial Unicode MS,Arial,sans-serif" size="2"><font face="Arial Unicode MS,Arial,sans-serif" size="2">Allegheny, Westmoreland, Lycoming.&nbsp;Attached to Westmoreland County until 1805.</font></font>&nbsp;
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| valign="top" |  
| style="vertical-align: top" | Part of Clarion County was formed in 1839 from Armstrong Co.<br>
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| valign="top" |  
 
|-
 
|-
| style="vertical-align: top" | [[Beaver County, Pennsylvania|Beaver]]
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| valign="top" |  
| style="vertical-align: top" | 1800<br>
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| valign="top" |  
| style="vertical-align: top" | <font face="Arial Unicode MS,Arial,sans-serif" size="2"><font face="Arial Unicode MS,Arial,sans-serif" size="2">Allegheny, Washington. Attached to Allegheny Co. until 1803.</font></font>
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| style="vertical-align: top" | <font face="Arial Unicode MS,Arial,sans-serif" size="2"><font face="Arial Unicode MS,Arial,sans-serif" size="2">Part of Lawrence County was formed in 1849 from Beaver Co.</font></font>
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| valign="top" |  
 
|-
 
|-
| style="vertical-align: top" | [[Bedford County, Pennsylvania|Bedford]]
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| valign="top" |  
| style="vertical-align: top" | <font face="Arial Unicode MS,Arial,sans-serif" size="2"><font face="Arial Unicode MS,Arial,sans-serif" size="2">1771</font></font>
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| valign="top" |  
| style="vertical-align: top" | <font face="Arial Unicode MS,Arial,sans-serif" size="2"><font face="Arial Unicode MS,Arial,sans-serif" size="2">Cumberland</font></font>
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| valign="top" |  
| style="vertical-align: top" | <font face="Arial Unicode MS,Arial,sans-serif" size="2"><font face="Arial Unicode MS,Arial,sans-serif" size="2">From it came part of Northumberland Co. in 1772, Westmoreland Co. in 1773, Huntingdon Co. in 1787, Somerset Co. in 1795, part of Cambria Co. in 1804, part of Blair Co. in 1846, Fulton Co. in 1850.</font></font>
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| valign="top" |  
 
|-
 
|-
| style="vertical-align: top" | [[Berks County, Pennsylvania|Berks]]
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| valign="top" |  
| style="vertical-align: top" | 1751 (org. 1752)
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| valign="top" |  
| style="vertical-align: top" | Philadelphia, Chester, Lancaster<br>
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| valign="top" |  
| style="vertical-align: top" | From it came part of Northumberland Co. in 1772 and part of Schuylkill Co. in 1811.
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| valign="top" |  
 
|-
 
|-
| style="vertical-align: top" | [[Blair County, Pennsylvania|Blair]]
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| valign="top" |  
| style="vertical-align: top" | 1846
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| valign="top" |  
| style="vertical-align: top" | Huntingdon,&nbsp;Bedford
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| valign="top" |  
| style="vertical-align: top" | &nbsp;--
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| valign="top" |  
 
|-
 
|-
| style="vertical-align: top" | [[Bradford County, Pennsylvania|Bradford]]&nbsp;(first named Ontario County)
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| valign="top" |  
| style="vertical-align: top" | 1810 (org. 1812)
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| valign="top" |  
| style="vertical-align: top" | Luzerne and Lycoming
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| valign="top" |  
| style="vertical-align: top" | &nbsp;--
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| valign="top" |  
 
|-
 
|-
| style="vertical-align: top" | [[Bucks County, Pennsylvania|Bucks]]
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| valign="top" |  
| style="vertical-align: top" | 1682
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| valign="top" |  
| style="vertical-align: top" | &nbsp;--
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| valign="top" |  
| style="vertical-align: top" | In 1751 Northampton County was set off.
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| valign="top" |  
 
|-
 
|-
| style="vertical-align: top" | [[Butler County, Pennsylvania|Butler]]
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| valign="top" |  
| style="vertical-align: top" | 1800
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| valign="top" |  
| style="vertical-align: top" | Allegheny
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| valign="top" |  
| style="vertical-align: top" | &nbsp;--
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| valign="top" |  
 
|-
 
|-
| style="vertical-align: top" | [[Cambria County, Pennsylvania|Cambria]]
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| valign="top" |  
| style="vertical-align: top" | 1804 (org. 1807)
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| valign="top" |  
| style="vertical-align: top" | Huntingdon, Somerset, and Bedford
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| valign="top" |  
| style="vertical-align: top" | &nbsp;--
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| valign="top" |  
 
|-
 
|-
| style="vertical-align: top" | [[Cameron County, Pennsylvania|Cameron]]
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| valign="top" |  
| style="vertical-align: top" | 1860<br>
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| valign="top" |  
| style="vertical-align: top" | Clinton, McKean, Elk, Potter<br>
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| valign="top" |  
| style="vertical-align: top" | &nbsp;--<br>
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| valign="top" |  
 
|-
 
|-
| style="vertical-align: top" | [[Carbon County, Pennsylvania|Carbon]]
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| valign="top" |  
| style="vertical-align: top" | 1843<br>
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| valign="top" |  
| style="vertical-align: top" | Northampton,&nbsp;Monroe
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| valign="top" |  
| style="vertical-align: top" | &nbsp;--<br>
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| valign="top" |  
 
|-
 
|-
| style="vertical-align: top" | [[Centre County, Pennsylvania|Centre]]
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| valign="top" |  
| style="vertical-align: top" | 1800<br>
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| valign="top" |  
| style="vertical-align: top" | Huntingdon, Lycoming, Mifflin, Northumberland
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| valign="top" |  
| style="vertical-align: top" | Part of Clinton County was formed in 1839 from Centre Co.
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| valign="top" |  
 
|-
 
|-
| style="vertical-align: top" | [[Chester County, Pennsylvania|Chester]]
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| valign="top" |  
| style="vertical-align: top" | 1682
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| valign="top" |  
| style="vertical-align: top" | &nbsp;--<br>
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| valign="top" |  
| style="vertical-align: top" | From it came Lancaster in 1728, part of Berks in 1751, Delaware in 1789.
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| valign="top" |  
 
|-
 
|-
| style="vertical-align: top" | [[Clarion County, Pennsylvania|Clarion]]
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| valign="top" |  
| style="vertical-align: top" | 1682<br>
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| valign="top" |  
| style="vertical-align: top" | &nbsp;--<br>
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| valign="top" |  
| style="vertical-align: top" | From it came these counties: Lancaster in 1728, part of Berks in 1751, Delaware in 1789.
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| valign="top" |  
 
|-
 
|-
| style="vertical-align: top" | [[Clearfield County, Pennsylvania|Clearfield]]
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| valign="top" |  
| style="vertical-align: top" | 1804 (org. 1812)
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| valign="top" |  
| style="vertical-align: top" | Huntingdon and Lycoming (Clearfield did not have its own courts until 1822.)
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| valign="top" |  
| style="vertical-align: top" | Part of Elk Co. was formed in 1843 from Clearfield Co.<br>
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| valign="top" |  
 
|-
 
|-
| style="vertical-align: top" | [[Clinton County, Pennsylvania|Clinton]]
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| valign="top" |  
| style="vertical-align: top" | 1839<br>
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| valign="top" |  
| style="vertical-align: top" | Centre and Lycoming<br>
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| valign="top" |  
| style="vertical-align: top" | In 1860 part of Cameron County was formed from Clinton Co.
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| valign="top" |  
 
|-
 
|-
| style="vertical-align: top" | [[Columbia County, Pennsylvania|Columbia]]
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| valign="top" |  
| style="vertical-align: top" | 1813<br>
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| valign="top" |  
| style="vertical-align: top" | Northumberland<br>
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| valign="top" |  
| style="vertical-align: top" | In 1818 additional land went to Schuylkill Co. In 1850 Montour Co. was formed from Columbia Co.
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| valign="top" |  
 
|-
 
|-
| style="vertical-align: top" | [[Crawford County, Pennsylvania|Crawford]]
 
| style="vertical-align: top" | 1800<br>
 
| style="vertical-align: top" | Allegheny<br>
 
| style="vertical-align: top" | No counties were formed from Crawford Co. Venango, Erie, Warren, and Mercer counties were attached to Crawford Co. for several years.
 
|-
 
| style="vertical-align: top" | [[Cumberland County, Pennsylvania|Cumberland]]
 
| style="vertical-align: top" | 1750<br>
 
| style="vertical-align: top" | Lancaster<br>
 
| style="vertical-align: top" | From it came Bedford Co., in 1771, part of Northumberland Co. in 1772, Franklin Co. in 1784, part of Mifflin Co. in 1789, Perry Co. in 1820.
 
|-
 
| style="vertical-align: top" | [[Dauphin County, Pennsylvania|Dauphin]]
 
| style="vertical-align: top" | 1785<br>
 
| style="vertical-align: top" | Lancaster<br>
 
| style="vertical-align: top" | From it came part of&nbsp;Lebanon County in 1813.<br>
 
|-
 
| style="vertical-align: top" | [[Delaware County, Pennsylvania|Delaware]]
 
| style="vertical-align: top" | 1789<br>
 
| style="vertical-align: top" | Chester<br>
 
| style="vertical-align: top" | &nbsp;--<br>
 
|-
 
| style="vertical-align: top" | [[Elk County, Pennsylvania|Elk]]
 
| style="vertical-align: top" | 1843<br>
 
| style="vertical-align: top" | Jefferson, Clearfield,&nbsp;McKean<br>
 
| style="vertical-align: top" | From it came part of Cameron Co. in 1860.<br>
 
|-
 
| style="vertical-align: top" | [[Erie County, Pennsylvania|Erie]]
 
| style="vertical-align: top" | 1800<br>
 
| style="vertical-align: top" | Allegheny (Attached to Crawford Co. for several years.)
 
| style="vertical-align: top" | &nbsp;--<br>
 
|-
 
| style="vertical-align: top" | [[Fayette County, Pennsylvania|Fayette]]
 
| style="vertical-align: top" | 1783<br>
 
| style="vertical-align: top" | Westmoreland<br>
 
| style="vertical-align: top" | &nbsp;--<br>
 
|-
 
| style="vertical-align: top" | [[Forest County, Pennsylvania|Forest]]
 
| style="vertical-align: top" | 1848<br>
 
| style="vertical-align: top" | Jefferson<br>
 
| style="vertical-align: top" | &nbsp;--<br>
 
|-
 
| style="vertical-align: top" | [[Franklin County, Pennsylvania|Franklin]]
 
| style="vertical-align: top" | 1784 <br>
 
| style="vertical-align: top" | Cumberland <br>
 
| style="vertical-align: top" | &nbsp;--<br>
 
|-
 
| style="vertical-align: top" | [[Fulton County, Pennsylvania|Fulton]]
 
| style="vertical-align: top" | 1850 <br>
 
| style="vertical-align: top" | Bedford <br>
 
| style="vertical-align: top" | &nbsp;--<br>
 
|-
 
| style="vertical-align: top" | [[Greene County, Pennsylvania|Greene]]
 
| style="vertical-align: top" | 1796 <br>
 
| style="vertical-align: top" | Washington <br>
 
| style="vertical-align: top" | &nbsp;--<br>
 
|-
 
| style="vertical-align: top" | [[Huntingdon County, Pennsylvania|Huntingdon]]
 
| style="vertical-align: top" | 1787 <br>
 
| style="vertical-align: top" | Bedford <br>
 
| style="vertical-align: top" | From it came part of Centre Co. in 1800, parts of Cambria and Clearfield counties in 1804, and part of Blair Co. in 1846.
 
|-
 
| style="vertical-align: top" | [[Indiana County, Pennsylvania|Indiana]]
 
| style="vertical-align: top" | 1803 <br>
 
| style="vertical-align: top" | Westmoreland,&nbsp;Lycoming (attached to Westmoreland Co. until 1806 when county was organized.)
 
| style="vertical-align: top" | &nbsp;-- <br>
 
|-
 
| style="vertical-align: top" | [[Jefferson County, Pennsylvania|Jefferson]]
 
| style="vertical-align: top" | 1804 <br>
 
| style="vertical-align: top" | Lycoming (Attached to Westmoreland Co. until 1806, then to Indiana Co. until 1830.)
 
| style="vertical-align: top" | From it came part of Elk Co. in 1843 and&nbsp;part of Forest Co. in 1848.<br>
 
|-
 
| style="vertical-align: top" | [[Juniata County, Pennsylvania|Juniata]]
 
| style="vertical-align: top" | 1831 <br>
 
| style="vertical-align: top" | Mifflin <br>
 
| style="vertical-align: top" | &nbsp;--<br>
 
|-
 
| style="vertical-align: top" | [[Lackawanna County, Pennsylvania|Lackawanna]]
 
| style="vertical-align: top" | 1878 <br>
 
| style="vertical-align: top" | Luzerne <br>
 
| style="vertical-align: top" | &nbsp;--<br>
 
|-
 
| style="vertical-align: top" | [[Lancaster County, Pennsylvania|Lancaster]]
 
| style="vertical-align: top" | 1728 <br>
 
| style="vertical-align: top" | Chester (Earlier was part of Susquehannock Indian territory.)
 
| style="vertical-align: top" | From it came York Co.&nbsp;in 1748, Cumberland Co.&nbsp;in 1750, part of Berks Co.&nbsp;in 1751, part of Northumberland Co. in 1772, Dauphin Co. in 1785, part of Lebanon Co. in 1813.
 
|-
 
| style="vertical-align: top" | [[Lawrence County, Pennsylvania|Lawrence]]
 
| style="vertical-align: top" | 1849 <br>
 
| style="vertical-align: top" | Beaver, Mercer<br>
 
| style="vertical-align: top" | &nbsp;--<br>
 
|-
 
| style="vertical-align: top" | [[Lebanon County, Pennsylvania|Lebanon]]
 
| style="vertical-align: top" | 1813 <br>
 
| style="vertical-align: top" | Dauphin,&nbsp;Lancaster<br>
 
| style="vertical-align: top" | &nbsp;--<br>
 
|-
 
| style="vertical-align: top" | [[Lehigh County, Pennsylvania|Lehigh]]
 
| style="vertical-align: top" | 1812 <br>
 
| style="vertical-align: top" | Northampton <br>
 
| style="vertical-align: top" | &nbsp;--<br>
 
|-
 
| style="vertical-align: top" | [[Luzerne County, Pennsylvania|Luzerne]]
 
| style="vertical-align: top" | 1786 <br>
 
| style="vertical-align: top" | Northumberland <br>
 
| style="vertical-align: top" | From it came part of Bradford Co. in 1810, Susquehanna Co. in 1810, part of Schuylkill Co. in 1818, Wyoming Co. in 1842, Lackawanna Co. in 1878.
 
|-
 
| style="vertical-align: top" | [[Lycoming County, Pennsylvania|Lycoming]]
 
| style="vertical-align: top" | 1795 <br>
 
| style="vertical-align: top" | Northumberland <br>
 
| style="vertical-align: top" | From it in 1800 came pts. of Armstrong, Venango, Warren; in 1803 pt. of Indiana Co.;in 1804 pt. of Clearfield Co., all of Jefferson, McKean, Potter, Tioga; in 1810 part of Bradford; in 1839 part of Clinton; in 1847 pt. of Sullivan.
 
|-
 
| style="vertical-align: top" | [[McKean County, Pennsylvania|McKean]]
 
| style="vertical-align: top" | 1804
 
| style="vertical-align: top" | Lycoming (Attached to Centre Co. 1804-1814, then to Lycoming Co. and Potter Co. until organized in 1826.)
 
| style="vertical-align: top" | From it came part of Elk Co. in 1843 and part of Cameron Co. in 1860.
 
|-
 
| style="vertical-align: top" | [[Mercer County, Pennsylvania|Mercer]]
 
| style="vertical-align: top" | 1800&nbsp; <br>
 
| style="vertical-align: top" | Allegheny (Attached to Crawford Co.; organized in 1804.)
 
| style="vertical-align: top" | From it came part of Lawrence Co.&nbsp;In 1849.<br>
 
|-
 
| style="vertical-align: top" | [[Mifflin County, Pennsylvania|Mifflin]]
 
| style="vertical-align: top" | 1789&nbsp; <br>
 
| style="vertical-align: top" | Cumberland,&nbsp;Northumberland<br>
 
| style="vertical-align: top" | From it came part of Centre Co. in 1800 and part of Juniata Co. in 1831.
 
|-
 
| style="vertical-align: top" | [[Monroe County, Pennsylvania|Monroe]]
 
| style="vertical-align: top" | 1836
 
| style="vertical-align: top" | Northampton,&nbsp;Pike
 
| style="vertical-align: top" | From it came&nbsp;part of Carbon Co.&nbsp;In 1843.
 
|-
 
| style="vertical-align: top" | [[Montgomery County, Pennsylvania|Montgomery]]
 
| style="vertical-align: top" | 1784 <br>
 
| style="vertical-align: top" | Philadelphia <br>
 
| style="vertical-align: top" | &nbsp;--<br>
 
|-
 
| style="vertical-align: top" | [[Montour County, Pennsylvania|Montour]]
 
| style="vertical-align: top" | 1850 <br>
 
| style="vertical-align: top" | Columbia <br>
 
| style="vertical-align: top" | &nbsp;--<br>
 
|-
 
| style="vertical-align: top" | [[Northampton County, Pennsylvania|Northampton]]
 
| style="vertical-align: top" | 1751 (org.&nbsp;1752)
 
| style="vertical-align: top" | Bucks <br>
 
| style="vertical-align: top" | From it came part of Northumberland Co. in 1772, Wayne Co. in 1798, part of Schuylkill Co. in 1811, Lehigh Co. in 1812, part of Monroe Co. in 1836, part of Carbon Co. in 1843.
 
|-
 
| style="vertical-align: top" | [[Northumberland County, Pennsylvania|Northumberland]]
 
| style="vertical-align: top" | 1772 <br>
 
| style="vertical-align: top" | Lancaster, Cumberland, Berks, Bedford, Northampton
 
| style="vertical-align: top" | From it came Luzerne Co. in 1786, part of Mifflin Co. in 1789, Lycoming Co. in 1795, part of Centre Co. in 1800, Columbia and Union counties in 1813.
 
|-
 
| style="vertical-align: top" | [[Ontario County, Pennsylvania|Ontario]] (extinct: See Bradford Co.)<br>
 
| style="vertical-align: top" | <br>
 
| style="vertical-align: top" | <br>
 
| style="vertical-align: top" | <br>
 
|-
 
| style="vertical-align: top" | [[Perry County, Pennsylvania|Perry]]
 
| style="vertical-align: top" | 1820 <br>
 
| style="vertical-align: top" | Cumberland <br>
 
| style="vertical-align: top" | &nbsp;--<br>
 
|-
 
| style="vertical-align: top" | [[Philadelphia County, Pennsylvania|Philadelphia]]
 
| style="vertical-align: top" | 1682<br>
 
| style="vertical-align: top" | &nbsp;--<br>
 
| style="vertical-align: top" | From it came part of Berks County in 1751 and Montgomery County in 1784. In 1854 all townships, districts and other parts of county consolidated into the City of Philadelphia.
 
|-
 
| style="vertical-align: top" | [[Pike County, Pennsylvania|Pike]]
 
| style="vertical-align: top" | 1814 <br>
 
| style="vertical-align: top" | Wayne <br>
 
| style="vertical-align: top" | From it came part of Monroe Co. in 1836.<br>
 
|-
 
| style="vertical-align: top" | [[Potter County, Pennsylvania|Potter]]
 
| style="vertical-align: top" | 1804 <br>
 
| style="vertical-align: top" | Lycoming (Attached to Lycoming Co. but elected joint commissioners with McKean Co. in 1814; became separate county in 1824; organized in 1835.)
 
| style="vertical-align: top" | From it came part of Cameron Co.&nbsp;in 1860.<br>
 
|-
 
| style="vertical-align: top" | [[Schuylkill County, Pennsylvania|Schuylkill]]
 
| style="vertical-align: top" | 1811 <br>
 
| style="vertical-align: top" | Berks, Northampton.&nbsp;In March 1818 additional land was received from parts of Columbia and Luzerne counties.
 
| style="vertical-align: top" | &nbsp;--<br>
 
|-
 
| style="vertical-align: top" | [[Snyder County, Pennsylvania|Snyder]]
 
| style="vertical-align: top" | 1855 <br>
 
| style="vertical-align: top" | Union <br>
 
| style="vertical-align: top" | &nbsp;--<br>
 
|-
 
| style="vertical-align: top" | [[Somerset County, Pennsylvania|Somerset]]
 
| style="vertical-align: top" | 1795 <br>
 
| style="vertical-align: top" | Bedford<br>
 
| style="vertical-align: top" | From it came&nbsp;part of Cambria Co.&nbsp;in 1804.<br>
 
|-
 
| style="vertical-align: top" | [[Sullivan County, Pennsylvania|Sullivan]]
 
| style="vertical-align: top" | 1847 <br>
 
| style="vertical-align: top" | Lycoming <br>
 
| style="vertical-align: top" | &nbsp;--<br>
 
|-
 
| style="vertical-align: top" | [[Susquehanna County, Pennsylvania|Susquehanna]]
 
| style="vertical-align: top" | 1810 (org. 1812)<br>
 
| style="vertical-align: top" | Luzerne <br>
 
| style="vertical-align: top" | &nbsp;--<br>
 
|-
 
| style="vertical-align: top" | [[Tioga County, Pennsylvania|Tioga]]
 
| style="vertical-align: top" | 1804 <br>
 
| style="vertical-align: top" | Lycoming (Tioga Co. was part of land claimed by Connecticut.
 
| style="vertical-align: top" | &nbsp;--<br>
 
|-
 
| style="vertical-align: top" | [[Union County, Pennsylvania|Union]]
 
| style="vertical-align: top" | 1813 <br>
 
| style="vertical-align: top" | Northumberland <br>
 
| style="vertical-align: top" | From it came Snyder County&nbsp;In 1855.
 
|-
 
| style="vertical-align: top" | [[Venango County, Pennsylvania|Venango]]
 
| style="vertical-align: top" | 1800 <br>
 
| style="vertical-align: top" | Allegheny,&nbsp;Lycoming (Attached to Crawford Co.; organized in 1805.)
 
| style="vertical-align: top" | From it came&nbsp;part of Clarion Co. was formed in 1839 and part of Forest Co. in 1866.
 
|-
 
| style="vertical-align: top" | [[Warren County, Pennsylvania|Warren]]
 
| style="vertical-align: top" | 1800 <br>
 
| style="vertical-align: top" | Allegheny,&nbsp;Lycoming (organized in 1819. Attached to Crawford Co. until 1805, the to Venango Co. until 1819.)
 
| style="vertical-align: top" | &nbsp;--<br>
 
|-
 
| style="vertical-align: top" | [[Washington County, Pennsylvania|Washington]]
 
| style="vertical-align: top" | 1781 <br>
 
| style="vertical-align: top" | Westmoreland <br><br>
 
| style="vertical-align: top" | From it came part of Allegheny Co. in 1788, Greene Co. in 1796, and part of Beaver Co. in 1800.
 
|-
 
| style="vertical-align: top" | [[Wayne County, Pennsylvania|Wayne]]
 
| style="vertical-align: top" | 1798
 
| style="vertical-align: top" | Northampton
 
| style="vertical-align: top" | From it came Pike County&nbsp;in 1814.
 
|-
 
| style="vertical-align: top" | [[Westmoreland County, Pennsylvania|Westmoreland]]
 
| style="vertical-align: top" | 1773
 
| style="vertical-align: top" | Bedford
 
| style="vertical-align: top" | From it came Washington Co. in 1781, Fayette Co. in 1783, part of Allegheny Co. in 1788, part of Armstrong Co. in 1800, part of Indiana Co. in 1803.
 
|-
 
| style="vertical-align: top" | [[Wyoming County, Pennsylvania|Wyoming]]
 
| style="vertical-align: top" | 1842 <br>
 
| style="vertical-align: top" | Luzerne <br>
 
| style="vertical-align: top" | &nbsp;--<br>
 
|-
 
| style="vertical-align: top" | [[York County, Pennsylvania|York]]
 
| style="vertical-align: top" | 1748 (org. 1749)<br>
 
| style="vertical-align: top" | Lancaster <br>
 
| style="vertical-align: top" | From it came Adams County in 1800.<br>
 
 
|}
 
|}
  
 
Extinct or Renamed Counties: <br>| [[Ontario County, Pennsylvania|Ontario]] |
 
Extinct or Renamed Counties: <br>| [[Ontario County, Pennsylvania|Ontario]] |

Revision as of 22:58, 9 February 2009


County
Year
Created

Parent County
Year Split and Child County

Extinct or Renamed Counties:
| Ontario |