Aleksander Klumberg (since 1936 Kolmpere; 17 April 1899 – 10 February 1958) was an Estonian decathlete.

[4] He competed in several events at the 1920 and 1924 Olympics and won a bronze medal in the decathlon in 1924.

[1] In 1922 he became the first official world record holder in the decathlon, albeit with a performance inferior to the Stockholm 1912 series of Jim Thorpe.

[5][6][7] Klumberg took up athletics around 1912, and in 1915–1917 held Russian records in several jumping and throwing events.

He also trained the national athletics teams of Poland (1927–1932) and Estonia, and in this capacity attended the 1928, 1932 and 1936 Olympics.