Marthine Ostenstad is a professional footballer from NOR and is currently 26 years old. He is on the books of Eintracht Frankfurt Women and wears shirt number 16. At international level, he features for Norway Women. His main role on the pitch is Defender.

Across the German Frauen Bundesliga 2025-2026, Marthine Ostenstad appeared in 8 matches and averaged 0.1 tackles, 0.1 interceptions, 2.9 clearances, and 0.1 blocked shots per game.