The 1985 ATP Championship, also known as the Cincinnati Open, was a tennis tournament played on outdoor hard courts at the Lindner Family Tennis Center in Mason, Ohio in the United States that was part of the 1985 Nabisco Grand Prix.

The tournament was held from August 19 through August 25, 1985.

Fourth-seeded Boris Becker won the singles title.

[3] Boris Becker defeated Mats Wilander 6–4, 6–2 Stefan Edberg / Anders Järryd defeated Joakim Nyström / Mats Wilander 4–6, 6–2, 6–3