Washington County, Pennsylvania: History
The county was created on March 28, 1781, from part of Westmoreland County. The city and county were both named after American Revolutionary War leader George Washington, who eventually became the first President of the United States. The town of Charleroi got its name from the Belgian city of Charleroi. There lived many Belgian immigrants in the Monongahela area at the end of the 19th century, some of whom were glass makers.