John T. Whitaker (9 April 1886 – 21 May 1977) was a British gymnast who competed in the 1908 Summer Olympics and in the 1912 Summer Olympics. As a member of the British team in 1908 he finished eighth in the team competition. He was part of the British team, which won the bronze medal in the gymnastics men's team, European system event in 1912. In the individual all-around competition he finished 21st.