The McMahon House is a historic building located in Dubuque, Iowa, United States.

This two-story stone structure was built by Ross McMahon, a master stonemason, in 1861.

[2] There are no windows on the north and west elevations given that the house is built into the side of a hill.

McMahon did the stonework on several churches and road bridges in the area during the mid to late 19th century.

This article about a property in Dubuque County, Iowa on the National Register of Historic Places is a stub.