SR 103 enters Willard from the south, passing the Willard Municipal Airport and passing through commercial properties. The road has an intersection with US 224, before heading through residential properties. The route enters downtown Willard as Main Street and makes a sharp turn due east onto Tiffin Street. Tiffin Street heads east through residential properties having an at-grade railroad crossing and an intersection with SR 99. East of the intersection with SR 99, SR 103 has an intersection with SR 598, before leaving Willard. East of Willard the highway passes through farmland, having an intersection with SR 61. The intersection with SR 61 is the western terminus of SR 103.