Pennsylvania County Research Guide

Washington County, Pennsylvania

Formed March 28, 1781 from Westmoreland County — county seat Washington. Who settled here, why families moved on, and where to look for their records.

Who settled here

Virginia claimed southwestern Pennsylvania as far as Pittsburgh until it yielded the argument in 1780, and the area was part of Virginia's Yohogania, Ohio, and Augusta Counties until 1781. Most settlers were English, Welsh, Irish, and Scots-Irish, along with settlers from eastern and central colonial Virginia.

The county was a center of the Whiskey Rebellion in 1794, led by David Bradford, after an excise tax passed Congress in 1791. The state's historical commission notes that distilling declined afterward.

Why families moved on

Records that say exactly why a family left are rare. Treat these as leads, and look for evidence about your own ancestors in deeds, tax lists, court cases, and church records.

Clues to look for

Historical and genealogical societies

  • Washington County Historical Society — LeMoyne House

Call or write before you visit. Many are volunteer-run with limited hours.

Before Washington County existed

Washington County was formed in 1781 from Westmoreland County. For records made before then, search the parent county:

Pennsylvania births, deaths, and state records

Printable Record Checklist

Fill in what you're looking for, print it, and take it with you to the courthouse or library.

Brick Walls & Buckeyes emblem Brick Walls & Buckeyes brickwallsbuckeyes.com · Washington County, Pennsylvania

Vital & Estates

Birth record (county register 1893–1905, state certificate 1906+)
Death record (county register 1893–1905, state certificate 1906+)
Marriage license (Register of Wills / Clerk of Orphans' Court)
Will / estate administration file
Orphans' Court or guardianship record
Divorce or civil case (Prothonotary)

Land & Property

Deed / land transfer (Recorder of Deeds)
Mortgage record
Tax assessment list
Original warrant or survey (Pennsylvania State Archives)

Community & Print

Newspaper mention
Historical society family file
Cemetery record / headstone photo
Church record
Census record

Compiled from county and society websites in October 2026. Offices move and details change, so confirm hours and fees before you visit.

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