Cliff Bayer (born June 24, 1977, in New York City) is an American two-time Olympian foil fencer.

[9] Bayer was the first American to win a medal at a senior men's World Cup event, taking the bronze in Espinho, Portugal in May 1999.

[11] Bayer won a second World Cup title in April 2000 in Bonn, Germany, where he defeated defending Olympic champion Puccini of Italy.

[9] Bayer won a team silver medal at the 1999 Pan American Games in Canada.

[14] Bayer was honored in 1999 as the United States Olympic Committee's Male Athlete of the Month for May, beating out canoe sprinter Nate Johnson, boxer Demetrius Hopkins, and cycler Christian Vande Velde.