Gramercy Mansion is a historic mansion in Stevenson, Maryland, United States, located on Greenspring Valley Road near Stevenson University, formerly Villa Julie College. It was built in 1902 by Alexander J. Cassatt, owner of the Pennsylvania Railroad and brother of the American Impressionist painter, Mary Cassatt. Gramercy Mansion was presented as a wedding gift to Cassatt's daughter, Eliza. Later owners included the prominent Brewster family, descendants of Benjamin Franklin, from whom a grandson became a Senator from Maryland. In the 1950s the estate became home to the Koinonia Foundation, a predecessor of the Peace Corps, before being bought and restored by Dr. & Mrs. Pomykala in 1985.
Currently, Gramercy Mansion is a bed and breakfast, and it hosts wedding receptions and business conferences.