The Alexander Organ House is a historic residence located in Maquoketa, Iowa, United States.

It is one of several Victorian houses in Maquoketa that are noteworthy for their quoined corners, a rare architectural feature in Iowa.

It features a 11⁄2-story wing in the back, quoining with cream-colored brick, limestone foundation, gable roof, a polygonal bay window on the east elevation, and a bracketed canopied porch with cresting on the main facade.

It was listed on the National Register of Historic Places in 1991.

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