Reynoldsville is a borough in Jefferson County, Pennsylvania, 102 miles (164 km) northeast of Pittsburgh, in a productive soft coal region. In the past, it had silk mills, brick and tile works, a tannery, a macaroni factory, and an asbestos plant to provide employment. In 1900, the population stood at 3,435 people; and in 1910, 3,189. Reynoldsville was greatly enlarged in 1913 when it annexed West Reynoldsville (population 993 in 1910) and three large adjacent areas.