The Robert H. Sunday House is located in Marshalltown, Iowa, United States.

It was designed by Frank Lloyd Wright in the Usonian style, and was listed on the National Register of Historic Places in 1988.

Initially the Sunday's choose the Usonian Automatic, a natural concrete block model, for their home.

[2] John H. "Jack" Howe, a Wright assistant who supervised the initial construction, designed an addition to this house in 1970 that conforms seamlessly with the original.

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