Thomas Koon House is a historic home in Cumberland, Allegany County, Maryland, United States.

It features arranged rectangular blocks with large expanses of window space, a terra cotta tiled hip roof and a small similarly influenced detached garage.

The house was designed by Holmboe & Lafferty of Clarksburg for Doctor Thomas W. Koon, who arrived in Cumberland setting up an "active general practice" in May 1900.

[2] The Thomas Koon House was listed on the National Register of Historic Places in 1982.

[1] This article about a Registered Historic Place in Allegany County, Maryland is a stub.