The Presidio of San Francisco (originally, El Presidio Real de San Francisco or The Royal Fortress of Saint Francis) is a park and former U.S. Army military fort on the northern tip of the San Francisco Peninsula in San Francisco, California, and is part of the Golden Gate National Recreation Area.

In 1996, the United States Congress created the Presidio Trust to oversee and manage the interior 80% of the park's lands, with the National Park Service managing the coastal 20%. In a first-of-its-kind structure, Congress mandated that the Presidio Trust make the Presidio financially self-sufficient by 2013. The Presidio achieved the goal in 2005, eight years ahead of the scheduled deadline.

The park is characterized by many wooded areas, hills, and scenic vistas overlooking the Golden Gate Bridge, San Francisco Bay, and the Pacific Ocean. It was recognized as a California Historical Landmark in 1933 and as a National Historic Landmark in 1962.