Tammi Øst (born 1 October 1958) is a Danish actress.
Øst was born in Copenhagen, and was trained at the Danish National School of Theatre and Contemporary Dance in 1982.
In 1988 she played the leading role of Katinka in Max von Sydow's film of the same name.
In 2012 she portrayed Birgit Eggert in the TV series Forbrydelsen III.
[2] Øst was married to actor Mikael Birkkjær, and has two children.