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 |
|
| 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.