Erwin may refer to:
- Erwin (storm)
- Erwin (User Friendly character)
People:
- Erwin Chargaff (1905–2002), Austrian biochemist
- Erwin Hauer (b. 1926), Austrian-born American sculptor
- Egon Erwin Kisch (1885–1948), Czechoslovakian writer and journalist
- Erwin Emata (b. 1973), Filipino mountain climber
- Erwin Kreyszig (1922–2008), Professor of Mathematics at Ohio State University
- Erwin Neutzsky-Wulff (born 1949), Danish author and philosopher
- Erwin Ramírez (b. 1971), Ecuadorian football (soccer) player
- Erwin Rommel (1891–1944), German Field Marshal of World War II
- Erwin Sánchez (born 1969), Bolivian football (soccer) player and manager
- Erwin Schrödinger (1887–1961), Austrian physicist
- Erwin Schulhoff (1894–1942), Czech composer and pianist
- Erwin Vandenbergh (b. 1959), Belgian football (soccer) player
Places:
- Erwin, New York
- Erwin, North Carolina
- Erwin, South Dakota
- Erwin, Tennessee
- Erwin Township, Michigan
Software:
- CA ERwin Data Modeler, CASE tool from Computer Associates