Satyananda Giri, also known as Acharya Swami Satyananda Giri Maharaj, was an Indian monk and chief monastic disciple of Kriya Yoga guru Swami Sri Yukteswar Giri. He was born on November 17, 1896, in Malkha Nagar of Bikrampore, which is currently located in Bangladesh. Satyananda's father, Mohinimohan Mazumder, was one of the founding fathers of Calcutta Deaf and Dumb School, and the family used to live on the school premises. Satyananda met his childhood friend and brother-disciple, Paramahansa Yogananda, when he was 11 years old and Yogananda was 14 years old.
Satyananda was the eldest of Mohinimohan's seven children. He studied at the Mitra Institution of Calcutta and was proficient in Bengali, Sanskrit, Hindi, English, and Oriya. He graduated with a B.A. with honors in Philosophy from the University of Calcutta and later became a part of the Giri branch of the Swami Order, of which his guru Sri Yukteswar was also a part. Satyananda and Ananda Mohan Lahiri, his school classmate and good friend, worked together at Yogananda's Ranchi school. In his later monastic life, Satyananda served as the leader of several yoga training institutions in East India. He passed away on August 2, 1971.