Martina Haag, born Helen Martina Uusma on 9 June 1964 in Lidingö, is a Swedish actress and author. She has acted in the film Underbar och älskad av alla in 2005. The film was made from her novel book with the same name. She participated in Let's Dance 2018 broadcast on TV4.

Martina has been married to television presenter Erik Haag.