Mercer County, Pennsylvania Genealogy

United States &gt; Pennsylvania &gt; Mercer County

Parent County
12 March 1800: Mercer County was created 12 March 1800 from Allegheny County.

Boundary Changes
20 March 1849: Lawrence County set off.

Neighboring Counties
Butler | Crawford | Lawrence | Venango | Ohio counties: Mahoning | Trumbull

Web Sites

 * USGenWeb project. May have maps, name indexes, history or other information for this county. Select the state, then the county.
 * Family History Library Catalog