Joseph Renzulli is an American educational psychologist. He developed the three-ring model of giftedness, which promoted a broadened conception of giftedness. He also developed the "Schoolwide Enrichment Model" for developing children's talents in schools. Renzulli is known for his contributions to understanding giftedness.

Joseph S. Renzulli is Professor of Educational Psychology at the University of Connecticut, where he also serves as director of the National Research Center on the Gifted and Talented. His research has focused on the identification and development of creativity and giftedness in young people and on organizational models and curricular strategies for total school improvement. A focus of his work has been on applying the strategies of gifted education to the improvement of learning for all students. He is a Fellow in the American Psychological Association and was a consultant to the White House Task Force on Education of the Gifted and Talented. He was recently designated a Board of Trustees Distinguished Professor at the University of Connecticut. Although he has obtained more than $20 million in research grants, he lists as his proudest professional accomplishments the UConn Mentor Connection program for gifted young students and the summer Confratute program at UConn, which began in 1978 and has served thousands of teachers and administrators from around the world.