Martina Zellner-Seidl (born 26 February 1974 in Traunstein) is a former German biathlete.

By the end of her career she had won one Olympic gold and six world championship medals, (2 gold, 1 silver and 3 bronze).

In the World Cup she achieved 14 podium places with three victories.

The best overall placing she achieved was in the 1997/98 season when she finished third.

3 (1 sprint, 1 pursuit and 1 mass-start)