Steinmann or Steinman is a German surname meaning "stone man", and may refer to:
- Dr. Steinman, a character in the Bioshock video game series
- Aharon Leib Shteinman, rabbi
- James "Jim" Richard Steinman, American rock composer and pianist
- David B. Steinman, bridge builder
- David Steinman, American environmentalist
- Sonia Steinman Gold, alleged spy
- Wilhelm Steinmann, German Luftwaffe fighter ace
- Ralph M. Steinman, immunologist and cell biologist at Rockefeller University
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