Jan Bártů (born 16 January 1955) is a Czech former modern pentathlete and coach who competed in the 1976 Summer Olympics and in the 1980 Summer Olympics. He won an individual bronze and a team silver at the 1976 Summer Games. He was coached by his father Karel Bártů, who competed for Czechoslovakia in modern pentathlon at the 1948 Summer Olympics. Jan secured his place at the 1976 Olympic Games at the age of 21 by finishing fourth in the 1976 Hungarian World Cup. He also finished second in the 1976 World Junior Championships, a few weeks after the Olympics. The success of Bártů and his team-mates at the Games represented the first major success in Modern Pentathlon for Czechoslovakia.