Lena Grebak (born 18 September 1991) is a Danish badminton player. In 2015, she won the bronze medal at the European Games in the women's doubles event partnered with Maria Helsbøl. In 2016, she also won the bronze medal at the European Championships in the mixed doubles event partnered with Mathias Christiansen.
Women's doubles
Mixed oubles
Women's doubles
Mixed doubles