Baikuntha Manandhar (; born 24 December 1951) is a Nepali marathon runner. He competed in four consecutive Olympic Games, from 1976 to 1988. He has won three consecutive gold medals in South Asian Games making a record. His record was broken by Deepak Bista by securing four gold medals consecutively in Taekwondo.
Manandhar was born on 24 December 1951 in Kalimati, Kathmandu. He was married to Subhadra Manadhar. She died in 2021 aged 68. Manadhar has two sons and two daughters.