1. US Post Office 23355 State Highway 94 Ste 5, Calhan, CO 80808 Coordinate: 38.83713,-104.39014 Phone: (800) 275-8777
2. United States Postal Service 655 Cascade St, Calhan, CO 80808 Coordinate: 39.03491,-104.30581 Phone: (800) 275-8777