Bagale Thapa or Bagalya Thapa (Nepali: बगाले/बगाल्या थापा pronunciation:[bagālē t̪ʰāpā]) is a prominent clan or subgroup within Thapa of Khas (Chettri) community.Khas Thapas belong to the Chhetri caste of the Kshatriya varna whose origin lies in Karnali region of Khas Kingdom. They were powerful and prominent family at Jumla of Karnali Khas Kingdom. In the times of Malla rule at Kathmandu valley, Bagale Thapas were skillful at both warfare and administration. Thus, King Jagajjaya Malla attended the services of Kashiram Thapa, a leader of Bagale Thapas to control inobedient Khas and Magar citizens. They belong to Aatreya Gotra in the Gotra system of Hinduism.
Amar Singh Thapa, one of the National heroes of Nepal and commander of Western front at Anglo-Nepalese war belonged to this clan.
The family of Kaji Bir Bhadra Thapa, commander of Unification of Nepal belonged to this clan. This family contains large number of renowned courtiers and warriors. He had three sons: Jeevan Thapa(died at Battle of Kirtipur), Bangsha Raj Thapa and Amar Singh Thapa (Sardar). The children of Amar Singh Thapa (Sardar) become influential. Prime Minister Bhimsen Thapa, the most revered among Thapas is the eldest son of Sardar Amar Singh Thapa(sanu). His nephew, son of Nain Singh Thapa, Mathabarsingh Thapa was the seventh Prime Minister of Nepal and niece, Nain's daughter was Queen Tripurasundari of Nepal.