Annapurna (; Nepali: अन्नपूर्ण) is a mountain situated in the Annapurna mountain range of Gandaki Province, north-central Nepal. It is the tenth highest mountain in the world at 8,091 metres (26,545 ft) above sea level and is well known for the difficulty and danger involved in its ascent.

Maurice Herzog led a French expedition to its summit through the north face in 1950, making it the first eight-thousand meter peak ever successfully climbed. The entire massif and surrounding area are protected within the 7,629-square-kilometre (2,946 sq mi) Annapurna Conservation Area, the first and largest conservation area in Nepal. The Annapurna Conservation Area is home to several world-class treks, including Annapurna Sanctuary and Annapurna Circuit.

For decades, Annapurna I Main held the highest fatality-to-summit rate of all principal eight-thousander summits; it has, however, seen great climbing successes in recent years, with the fatality rate falling from 32% to just under 20% from 2012 to 2022. This figure places it just under the most recent fatality rate estimates for K2, at about 24%. The mountain still poses grave threats to climbers through avalanche danger, unpredictable weather and the extremely steep and committing nature of its climbing routes, in particular its 3,000-metre (9,800 ft) south face, renowned as one of the most difficult climbs in the world. It is also a dangerous peak for trekkers, as in the case of a 2014 snowstorm near it and Dhaulagiri which claimed at least 43 lives. As of 2022, 365 people had reached the summit of Annapurna I, while 72 had died in the attempt.