The Paper Mill House and Museum is a historic three story stone building along Darby Creek in Newtown Township, Delaware County, Pennsylvania. The original building was constructed in c.1770 to house four families that worked at the local mills along the Darby Creek. The building also contained a general store that served the community that grew up around the mills. Saved from demolition and restored in the early 1980’s by concerned residents, today the house serves as a local history museum as well as a home to archives and headquarters of the Newtown Square Historical Society.