Dietrich Hermann Hegewisch (15 December 1746 – 4 April 1812) was a German historian who was a native of Quakenbrück.
He was the father of political publicist Franz Hermann Hegewisch (1783-1865).
Following graduation he was a private tutor, then later worked as a newspaper editor in Hamburg.
He was a prolific author who published books over a wide array of subjects.
His 1811 Einleitung in die historische Chronologie ("Introduction to Historical Chronology") was translated into English in 1837.