Old Rock House, also known as Shapley Ross House, is a historic home located at Moscow Mills, Lincoln County, Missouri. It was built between about 1818 and 1821, and is a two-story, five-bay, Classical Revival style squared rubble limestone dwelling, with a two-story rear ell added about 1870. The house measures 56 feet, 6 inches, wide and 46 feet, 3 1/2 inches, deep.
It was listed on the National Register of Historic Places in 1972.