The Isla Magdalena National Park (Spanish: Parque Nacional Isla Magdalena) is a protected area in Magdalena Island, Patagonia, Chile. It was created in 1967 as forest reserve. It was classified as a national park in June 1983.
Puerto Gaviota in the south of the national park is considered particularly noteworthy. In addition to larger Atilio island in the north, there are a number of smaller islands in the national park.
The Isla Magdalena climate has an annual average temperature of and an annual precipitation of approximately per year.
The park can best reached by sea from the ports Puerto Cisnes or Puerto Puyuhuapi. On the island, no infrastructure exists.
The highest point of the park is Mentolat Volcano at .