Stewart Cobblestone Farmhouse is a historic home located at Mendon in Monroe County, New York. It is a vernacular Greek Revival style cobblestone farmhouse built about 1835. It is constructed of medium-sized field cobbles and is one of only 10 surviving cobblestone buildings in Mendon. The house features a Colonial Revival style portico added in the 20th century.

It was listed on the National Register of Historic Places in 1997.