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Neudecker is the family name of the following people:
- Anneliese Neudecker (* 1984), Austrian stage and costume designer
- Christian Gotthold Neudecker (1807–1866), German church historian, private scholar and educator
- Christiane Neudecker (* 1974), German writer and director
- Gabriele Neudecker (* 1965), Austrian screenwriter and director
- Heinz Neudecker (1933–2017), Dutch business mathematician
- Jasmina Neudecker (Jasmina Daria Neudecker), science journalist at ZDF
- Johann Baptist von Neudecker (1840–1926), German Roman Catholic clergyman, titular bishop Helenopolis and auxiliary bishop in the Archdiocese of Munich and Freising
- Luzi Neudecker (* 1932), Austrian actress
- Mariele Neudecker (* 1965), German artist
- Richard Neudecker (archaeologist) (* 1949), German archaeologist
- Richard Neudecker (soccer player) (* 1996), German soccer player
- Wilhelm Neudecker (1913–1993), German entrepreneur and football official