Dittrich is a variant of the German name Dietrich. It occurs as a surname of ethnic Germans in Silesia. Notable people with the surname include:
- Barbara Dittrich (born 1964), American politician
- Boris Dittrich (born 1955), Dutch politician and human rights activist
- Denise Dittrich (born 1957), American Democratic politician
- Franz Dittrich, Austrian pathologist
- Klaus Dittrich, German computer scientist
- Olli Dittrich, German actor and comedian
- P. Dittrich (fl. 1880–1918), first German photographer to establish himself in Egypt
- Paul-Heinz Dittrich (1930–2020), German composer and academic teacher
- Rudolph Dittrich, German entomologist
- Raik Dittrich, East German biathlete
- Thomas Dittrich (born 1954), German hurdler
- Werner Dittrich (born 1937), German weightlifter
- Wolfgang Dittrich, triathlete
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