Caddoa is an extinct town located in Bent County, Colorado, United States.

[1] The community takes its name from nearby Caddoa Creek.

[3] The Caddoa post office operated from November 7, 1881, until March 7, 1958.

[4][5] The U.S. Post Office at Hasty (ZIP Code 81044) now serves Caddoa postal addresses.

[2] Caddoa District, from the construction of John Martin Reservoir, moved to Caddoa from the Tucumcari District after the Conchas Project finished.