Shawnee is an unincorporated community and a U.S. Post Office located in northern Park County, Colorado, United States. Shawnee is situated in the Platte Canyon, along the North Fork South Platte River, west of Bailey on U.S. Highway 285.The Shawnee Post Office has the ZIP Code 80475.Shawnee consists largely of a general store and post office, and surrounding houses, on the hillside south of the highway overlooking the river valley.A post office called Shawnee has been in operation since 1900. The community takes its name from nearby Shawnee Peak.Shawnee is located at 39°25′12″N 105°33′06″W / 39.42000°N 105.55167°W / 39.42000; -105.55167.