The Gir Forest National Park and Wildlife Sanctuary (also known as Sasan-Gir, ગીર રાષ્ટ્રીય ઉદ્યાન and गिर वन) is a forest and wildlife sanctuary in Gujarat, India. Established in 1965, with a total area of 1412 km² (about 258 km² for the fully protected area (the national park) and 1153 km² for the Sanctuary), the park is located 65 km to the south-east of Junagadh and 60 km to south west of Amreli.

It is the sole home of the pure Asiatic Lions (Panthera leo persica) and is considered to be one of the most important protected areas in Asia due to its supported species. The ecosystem of Gir, with its diverse flora and fauna, is protected as a result of the efforts of the government forest department, wildlife activists and NGOs. The forest area of Gir and its lions were declared as "protected" in the early 1900s by the then Nawab of the princely state of Junagadh. This initiative assisted in the conservation of the lions whose population had plummeted to only 15 through slaughter for trophy hunting.

The April 2010 census recorded the lion-count in Gir at 411, an increase of 52 compared to 2005. The lion breeding programme covering the park and surrounding area has bred about 180 lions in captivity since its inception.