Unemployment Rate in Chester County, PA was 3.10% in May of 2026, according to the United States Federal Reserve. Historically, Unemployment Rate in Chester County, PA reached a record high of 11.10 in April of 2020 and a record low of 2.00 in December of 1998. Trading Economics provides the current actual value, an historical data chart and related indicators for Unemployment Rate in Chester County, PA - last updated from the United States Federal Reserve on August of 2026.