List of Interstate Highways in Wyoming

The Interstate Highways in Wyoming are the segments of the Dwight D. Eisenhower National System of Interstate and Defense Highways owed and maintained by the Wyoming Department of Transportation. It comprises 914 mi on four routes as well as Business Interstate Highways. Construction began in September 1956 on Interstate 25 (I-25) and the network was completed in October 1985. It cost an estimated $570 million to build Wyoming's portion of the Interstate Highway System.