Tom Rath (born 1975) is an American consultant on employee engagement, strengths, and wellbeing, and author. He is best known for his studies on strengths-based leadership and wellbeing and synthesizing research findings in a series of bestselling books. His books have sold more than 5 million copies and have been translated into sixteen languages.

Rath holds a B.A. in Psychology from the University of Michigan, and a M.S. in Psychology from the University of Pennsylvania. After his studies Rath started working at Gallup, Inc., where he participates as senior scientist, consultant and advisor. He served as vice chairman of the VHL cancer research organization and is a regular guest lecturer at the University of Pennsylvania.

Rath’s first book, How Full Is Your Bucket?, coauthored with his grandfather, Donald O. Clifton, during his final year of life, became a New York Times bestseller in 2004.

Strengths Based Leadership (2009), co-authored with Barry Conchie, is based on Rath’s and Gallup's research on leadership and on what followers expect from their leaders (trust, compassion, stability, hope).

Wellbeing: The Five Essential Elements (2010), a New York Times bestseller, coauthored with Jim Harter, is based on Gallup’s research on wellbeing. The book lists five elements of well-being as career wellbeing, social wellbeing, financial wellbeing, community wellbeing, and physical wellbeing.

Rath’s most well-known book, StrengthsFinder 2.0 (2007), #1 Wall Street Journal bestseller, was listed as the top worldwide business bestseller by The Economist in 2011.

In 2012, he took a sabbatical from his full-time position in Gallup to focus on writing a new book, titled Eat Move Sleep: How Small Choices Lead to Big Changes which became a New York Times bestseller upon its publication in October 2013. Eat Move Sleep was also recognized as one of the best nonfiction books of 2013 by Apple iTunes. It describes the impact of eating, moving, and sleeping on health and everyday energy and offers practical ideas on how to make better health choices. The book emphasizes the interrelatedness of eating, moving and sleeping and encourages focusing on all three in any health improvement program.