Nain Singh Thapa

General Kaji Nain Singh Thapa
जनरल काजी नैनसिंह थापा
Portrait of Thapa Kaji Nain Singh
Personal details
Born	c. AD 1777 Borlang, Gorkha district
Died	1728 Saka Era (1806/07 AD) Kangra Fort, Garhwal Kingdom
Children	Mathabar Singh Thapa, Queen Tripurasundari of Nepal, Ujir Singh Thapa, Ganesh Kumari (mother of Jung Bahadur Rana)
Parents	Amar Singh Thapa (sardar) (father) Satyarupa Maya (mother)
Relatives	Bhimsen Thapa (brother) Ranajit Pande (father-in-law) Balbhadra Kunwar (nephew) Jang Bahadur Rana (grandson)
Residence	Thapathali Durbar
Military service
Allegiance	Nepal
Rank	General
Battles/wars	Battles of Unification of Nepal

Nain Singh Thapa or Nayan Singh Thapa (Nepali: नैनसिंह थापा/नयनसिंह थापा) (died late 1806 or early 1807) was a Nepalese Kaji (minister) and a military general. He died in the offensive campaign of Kangra from bullet injury. He was the owner of the Thapathali Durbar temple complex.