Jack Canfield is an American author and motivational speaker. He is best known as the co-author of the Chicken Soup for the Soul series, which has over 250 titles and 500 million copies in print in more than 40 languages. In 2005, Canfield co-authored The Success Principles: How to Get From Where You Are to Where You Want to Be with Janet Switzer.

Canfield received a BA in Chinese History from Harvard University and a Masters from the University of Massachusetts. He has worked as a teacher, a workshop facilitator, and a psychotherapist. He is the founder of Self Esteem Seminars in Santa Barbara and The Foundation for Self Esteem in Culver City, California. The mission of Self Esteem Seminars is to train individuals to improve their lives through self-esteem enhancement.

In 1978, Canfield was named one of the Ten Outstanding Young Americans by the United States Jaycees. He holds the Guinness World Record for having seven books simultaneously on the New York Times Best Seller list.