Reinitz is a surname of Ashkenazic and German origin, meaning either "queen", "counsel" or "lustful". Notable people with the surname include:

Jacob Reinitz (1879–1934), Hungarian-born Jewish smuggler and murderer Maximilian Reinitz (1872–1935), Austrian painter

See also Janet Braun-Reinitz (1938–2023), American muralist, painter and social activist

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