Kenneth Hartley Blanchard (born May 6, 1939) is an American author. His extensive writing career includes over 60 published books, most of which are co-authored books. His most successful book, The One Minute Manager, has sold over 13 million copies and been translated into many languages.

Blanchard is also the Chief Spiritual Officer of The Ken Blanchard Companies, an international management training and consulting firm that he and his wife, Marjorie Blanchard, co-founded in 1979 in San Diego, California. Blanchard is known for the quote "None of us is as smart as all of us."