Wille and Michigan State’s Caroline Powers, who were tied after 36 holes, both closed with even-par 72 to finish at 1-under 215 at Wilderness Golf Club.
Wille then won the scorecard playoff to take medalist honors.
The Augusta State women also finished the final round where they started – in eighth place.
In addition to Wille’s 72, Marit Bjerke had 74, Casey Kennedy shot 79 and Julia Stalbro had 79. The noncounting score was Christine Duschek-Hansen’s 82.