Iowa Primary Road No. 15
Primary Road No. 15 was a state highway in western Iowa. It is related to the current highways:
- U.S. Highway 169 between the Missouri state line and Winterset
- Iowa Highway 92 between Winterset and near Bevington
- Iowa Highway 28 between near Bevington and Des Moines
- U.S. Highway 69 between Des Moines and the Minnesota state line