Stein Mill is a historic grist mill located in Greenwich Township, Berks County, Pennsylvania. The mill was built in 1857, and is a 3 1/2-story banked stone building measuring 37 feet, 4 inches, wide by 45 feet, 9 inches, deep. Also on the property is the miller's house; a stone dwelling with the oldest section dating back to about 1816. It operated as a merchant mill until 1899.
It was listed on the National Register of Historic Places in 1990.