The Greystone Mill Historic District encompasses an early 20th-century textile mill complex on Greystone Avenue in Johnston and North Providence, Rhode Island. The complex consists of three brick buildings on the North Providence side of the Woonasquatucket River, a dam spanning the river, and a water tank near the dam in Johnston. The main structure consists of a series of structures combined to form a rambling structure, built between 1904 and 1911 to designs by Frank Sheldon and Son, an architectural firm that was a leading designer of textile facilities at the time.[2]