John Adolf Fredrik Zander (31 January 1890 – 9 June 1967) was a Swedish middle-distance runner who competed at the 1912 and 1920 Summer Olympics in the 1500 m and 3000 m events.^[2]

In 1912 he finished seventh and tenth, respectively. Although his 3,000 m team placed second he did not receive a medal because only three best runners from a team were counted, while he was fourth. The 1916 Olympics were cancelled due to World War I. At the 1920 Games Zander failed to finish his 1500 m race. He helped Sweden to qualify for the final in the 3000 metre team race but he did not run in the final, in which Sweden won the bronze medal.^[3]

Nationally Zander won 10 Swedish titles, in the 800 m (1912–13), 1,500 m (1913, 1915–18), steeplechase (1915) and 5,000 m (1917–18). He also won one mile race at the English AAA Championship; 3,000 and 5,000 m events at the 1914 Baltic Games, and four events at the 1916 Swedish Games. He semi-retired in 1918, and had a rib injury while preparing for the 1920 Olympics. During his career he set Swedish records in the 1,500 and 5,000 m and world records over 1,500, 2,000 and 3,000 metres. In retirement he worked as an actuary for the Pension Board in Stockholm.^[3][4]