Clifton Hillegass, American publisher, founded CliffsNotes (died 2001)

Clifton K. Hillegass was the creator and publisher of CliffsNotes.

CliffsNotes are a series of student study guides. The guides present and create literary and other works in pamphlet form or online. Detractors of the study guides claim they let students bypass reading the assigned literature. The company claims to promote the reading of the original work and does not view the study guides as a substitute for that reading.