Matheson is an unincorporated community and a U.S. Post Office in Elbert County, Colorado, United States. The Matheson Post Office has the ZIP Code 80830.The town was named after Duncan Matheson, the original owner of the town site.The television series Honey, I Shrunk the Kids: The TV Show is set in Matheson, Colorado. However, the series portrays Matheson as much larger, a hub of high-tech industry, and located somewhere in the mountains west of Denver.