Beaver County, Pennsylvania Genealogy

United States &gt; Pennsylvania &gt; Beaver County

County Courthouse
810 Third Street Beaver, PA 15009 (724) 728-5700

Parent County
12 March 1800, Beaver County was created from Allegheny and Washington Counties.

Boundary Changes

 * Southern 1/3 of Beaver was disputed between Virginia and Pennsylvania until Mason-Dixon Line was finalized in 1780; northern 2/3 was not included in any county until 1785
 * 1750: Southern 1/3 was incorporated into Cumberland Co. when Cumberland was formed
 * 1771: Southern 1/3 became part of Bedford Co. when Bedford was erected in 1771
 * 1773: Southern 1/3 became part of Westmoreland Co. when Westmoreland was formed in 1773
 * 1781: Southern 1/3 became part of Washington Co. when Washington was formed in 1781
 * 1783: Northern 2/3 was designated as Depreciation Lands for Revolutionary War soldiers
 * 1785: Northern 2/3 was annexed to Northumberland Co.
 * 1788: Nearly all of Beaver fell into Allegheny Co. when Allegheny was created in 1788; a small southern portion remained in Washington Co.
 * 1800: Beaver County was created (it then included part of today's Lawrence Co.)
 * 1849: Lawrence Co. was created, giving Beaver Co. its current boundaries

Maps

 * Ancestor Tracks has posted free, downloadable images of the township maps showing landowners from Map of Lawrence and Beaver Counties from Actual Surveys by N.S. Ames which was published in 1860.

Web Sites

 * Linkpendium - Beaver County
 * USGenWeb project
 * Family History Library Catalog