Walter Haas may refer to:
- Walter A. Haas (1889–1979), former president and chairman of Levi Strauss & Co.
- Walter A. Haas, Jr. (1916–1995), former president and chairman of Levi Strauss & Co., son of Walter A. Haas.
- Walter de Haas or Hanns Günther (1886–1969), German author, translator and editor
- Walter H. Haas (born 1917), founder of Association of Lunar and Planetary Observers