Osa Massen, nascuda Aase Madsen Iversen (Copenhaguen, Dinamarca, 13 de gener de 1914 - Santa Monica, Califòrnia, 2 de gener de 2006), va ser una actriu danesa que es va convertir en una actriu de cinema d'èxit a Hollywood. Es va convertir en ciutadana naturalitzada dels Estats Units el 1941.

Osa Massen (January 13, 1914 - January 2, 2006) was a Danish actress who went on to become a successful movie actress in Hollywood. She became a naturalized citizen of the United States in 1941.