Jan Kodeš (born 1 March 1946) is a Czech former professional tennis player. A three-time major singles champion, Kodeš was one of the premier players in the early 1970s.

Kodeš's greatest success was achieved on the clay courts of the French Open, where he won the singles title in 1970 and 1971. However, he also won Wimbledon on grass courts in 1973, although the tournament was largely boycotted by top players that year over the ban of Nikola Pilić by the International Lawn Tennis Federation (ILTF).[1][2][3]

Kodeš never played at the Australian Open, but was twice the runner-up at the US Open, in 1971 and 1973.[4][3] Kodeš reached his highest ATP ranking of world No. 5 in September 1973.[3] During the Open Era, he won nine top-level singles titles and 17 doubles titles.

Kodeš was inducted into the International Tennis Hall of Fame in 1990. In 2013, he received the Czech Fair Play Award from the Czech Olympic Committee. He is an economics graduate of the Prague University