Sedalia is a census-designated place (CDP) in Douglas County, Colorado, United States. The CDP population was 211 at the 2000 census. The Sedalia Post Office has the ZIP Code 80135.
Sedalia is located at 39°26′16″N 104°57′51″W / 39.43778°N 104.96417°W / 39.43778; -104.96417 (39.437892, -104.964117).
According to the United States Census Bureau, the CDP has a total area of 1.4 square miles (3.6 km²), all of it land.