The Dey Building is a building in Rico, Colorado, USA, that is listed on the National Register of Historic Places for its importance as a significant local commercial building, and for its Romanesque Revival style. The Dey Building was built in 1892 with a saloon on the ground floor and offices in the upper level. The saloon has been in almost continuous operation throughout the building's history. The local newspaper refers to an H.J. Dey who operated a saloon in Rico during the 1880s, but no evidence other than the name connects Dey to the Dey Building.