The 1989 du Maurier Classic was contested from June 29 to July 2 at Beaconsfield Golf Club. It was the 17th edition of the du Maurier Classic, and the 11th edition as a major championship on the LPGA Tour.
This event was won by Tammie Green.
Coordinates: 45°26′39″N 73°49′51″W / 45.444039°N 73.830811°W