The 1980 ATP Championship, also known as the Cincinnati Open, was a men's 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 1980 Volvo Grand Prix. It was the 80th edition of the tournament and was held from August 18 through August 24, 1980. Third-seeded Harold Solomon won the singles title.
Harold Solomon defeated Francisco González 7–6, 6–3
Bruce Manson / Brian Teacher defeated 
Wojtek Fibak / Ivan Lendl 6–7, 7–5, 6–4