Bahía de Loreto National Park (Spanish: Parque Nacional Bahía de Loreto) is a national park on the east coast of the Baja California Peninsula in Mexico, about 203 kilometres (126 mi) north of the city of La Paz in the state of Baja California Sur.

The park protects 2,065.81 square kilometres (797.61 sq mi) of relatively pristine marine ecosystem in the central Sea of Cortez, including five large uninhabited islands and many smaller islets in Loreto Bay.

It is known for its great variety of coastal environments, such as sandy beaches, sea cliffs, submarine canyons, and marine terraces, and is home to an exceptionally high biological diversity, especially of marine mammals.

[2] In 2004, it joined the Ramsar list of Wetlands of International Importance,[1] and in 2005, it was declared a UNESCO World Heritage Site collectively with many other protected areas in the Gulf of California.

The park covers an area of 206,580.75 hectares (510,472.2 acres), 88% of which is ocean surface; the islands, islets, and coastal regions that comprise the remaining 12% are mostly uninhabited.