The Keerl–Decker House is a historic building located in Mason City, Iowa, United States.

The two-story frame structure features a full height front porch with Ionic columns.

The house is capped with a hip roof with dormers, and a denticulated cornice with modillions.

It was built for Irving Keerl, who served as Clerk of Courts for Cerro Gordo County, and he was one of the organizers of the Iowa State Bank of Mason City.

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