Aleksander Tammert (born 2 February 1973) is an Estonian discus thrower.

Tammert competed at the 2004 Olympics and originally finishing fourth, but as gold medal winner Róbert Fazekas was disqualified, Tammert received the bronze medal.

Fellow Estonian Gerd Kanter won silver medals at both these events.

His personal best throw is 70.82m (232'3½"), set on 15 April 2006 in Denton, Texas.

[4] His father, Aleksander Tammert Sr. (28 April 1947 – 27 October 2006), was a retired shot putter and athletics coach.