"You are walking on the earth as in a dream. Our world is a dream within a dream; you must realize that to find God is the only goal, the only purpose, for which you are here. For Him alone you exist. Him you must find." – from the book The Divine Romance

Paramahansa Yogananda (born Mukunda Lal Ghosh; January 5, 1893 – March 7, 1952) was an Indian and American Hindu monk, yogi, and guru who founded the Self-Realization Fellowship (SRF)/Yogoda Satsanga Society of India (YSS), a religious meditation and Kriya Yoga organization, to disseminate his teachings. A chief disciple of the yoga guru Swami Sri Yukteswar Giri, he was sent by his lineage to spread yogic teachings to the West. He immigrated to the US at the age of 27, intending to demonstrate a unity between Eastern and Western religions and advocate for a balance between Western material growth and Indian spirituality. His longstanding influence on the American yoga movement, and especially the yoga culture of Los Angeles, led yoga experts to consider him the "Father of Yoga in the West". He lived his final 32 years in the US.

Yogananda was among the first Indian religious teachers to settle in the US, and the first prominent Indian to be hosted in the White House (by President Calvin Coolidge in 1927); his early acclaim led to him being dubbed "the 20th century's first superstar guru" by the Los Angeles Times. Arriving in Boston in 1920, he embarked on a successful transcontinental speaking tour before settling in Los Angeles in 1925. For the next two and a half decades, he gained local fame and expanded his influence worldwide: he created a monastic order and trained disciples, went on teaching tours, bought properties for his organization in various California locales, and initiated thousands into Kriya Yoga. By 1952, SRF had over 100 centers in both India and the United States. As of 2012^[update], they had groups in nearly every major American city. His "plain living and high thinking" principles attracted people from all backgrounds among his followers.

He published his Autobiography of a Yogi in 1946 to critical and commercial acclaim. It has sold over four million copies, with Harper San Francisco listing it as one of the "100 best spiritual books of the 20th Century". Former Apple CEO Steve Jobs ordered 500 copies of the book, for each guest at his memorial to be given a copy. It was also one of Elvis Presley's favorite books, and one he gave out often. The book has been regularly reprinted and is known as "the book that changed the lives of millions". A documentary about his life commissioned by SRF, Awake: The Life of Yogananda, was released in 2014. He remains a leading figure in Western spirituality. A biographer of Yogananda, Phillip Goldberg, considers him "the best known and most beloved of all Indian spiritual teachers who have come to the West".

Yogananda was born Mukunda Lal Ghosh in Gorakhpur, Uttar Pradesh, India to a Hindu Bengali Kayastha family. He was the fourth of the eight children, and second of the four sons, of Bhagabati Charan Ghosh, the vice president of Bengal-Nagpur Railway, and Gyanprabha Devi. According to his younger brother Sananda, Mukunda's awareness and experience of the spiritual were far beyond the ordinary even from his earliest years. The nature of his father's job caused the family to move several times during Mukunda's childhood, including to Lahore, Bareilly, and Kolkata. According to Autobiography of a Yogi, he was eleven years old when his mother died, just before the marriage of his eldest brother Ananta; she left behind a sacred amulet for Mukunda, given to her by a holy man, who told her that Mukunda was to possess it for some years, after which it would vanish into the ether from which it came. Throughout his childhood, his father would fund train passes for his many sight-seeing trips to distant cities and pilgrimage spots, which he would often take with friends. In his youth he sought out many of India's Hindu sages and saints, including the Soham "Tiger" Swami, Gandha Baba, and Mahendranath Gupta, hoping to find an illumined teacher to guide him in his spiritual quest.

After finishing high school, Mukunda formally left home and joined a Mahamandal Hermitage in Varanasi; however, he soon became dissatisfied with its insistence on organizational work instead of meditation and God-perception. He began praying for guidance; in 1910, his seeking after various teachers mostly ended when, at the age of 17, he met his guru, Swami Sri Yukteswar Giri; at that time his well-guarded amulet mysteriously vanished, having served its spiritual purpose. In his autobiography, he describes his first meeting with Sri Yukteswar as a rekindling of a relationship that had lasted for many lifetimes:

"We entered a oneness of silence; words seemed the rankest superfluities. Eloquence flowed in soundless chant from heart of master to disciple. With an antenna of irrefragable insight I sensed that my guru knew God, and would lead me to Him. The obscuration of this life disappeared in a fragile dawn of prenatal memories. Dramatic time! Past, present, and future are its cycling scenes. This was not the first sun to find me at these holy feet!"

He went on to train under Sri Yukteswar as his disciple for the next ten years (1910–1920) at his hermitages in Serampore and Puri. Later, Sri Yukteswar informed Mukunda that he had been sent to him by the great guru of their lineage, Mahavatar Babaji, for a special world purpose of yoga dissemination.