Ujir Singh Thapa or Uzir Singh Thapa (Nepali: उजिरसिंह थापा), also known as Wazir Simha Thapa, anglicized as Wuzeer Singh, was Nepalese administrator and military officer. He was the son of Kaji Nain Singh Thapa, a nephew of the Mukhtiyar Bhimsen Thapa and elder brother of Mathabar Singh Thapa. His mother was Rana Kumari Pande, daughter of Mulkaji Ranajit Pande and granddaughter of Kaji Tularam Pande. During his late teenage, he was the military commander at the Palpa-Butwal axis during the Anglo-Nepalese War. He became the Governor (Bada Hakim) and the commander of armed forces deployed in Palpa administrative sector in 1814 AD on substitute of his grandfather Amar Singh Thapa (sanukaji) who died that year.