Walter Haas may refer to:
Walter A. Haas (1889–1979), president and chairman of Levi Strauss & Co. Walter A. Haas Jr. (1916–1995), 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 (1917–2015), founder of Association of Lunar and Planetary Observers Walter F. Haas (1869–1936), city attorney of Los Angeles, California Walter J. Haas, American businessman and former president of the Oakland Athletics