De Haas
De Haas as a surname can refer to:
- Darius de Haas (born 1968), African-American stage actor and singer
- Geertruida de Haas-Lorentz (1885–1973), Dutch physicist, daughter of Hendrik Lorentz, wife of Wander Johannes de Haas
- Jacob de Haas (1872–1937), British Hasidic Jew and a leader for modern Zionism movement
- Johannes Hubertus Leonardus de Haas (1832–1908), Dutch animal and landscape painter
- Mauritz de Haas (1832–1895), Dutch-born American painter
- Nico de Haas (1907–2000), Dutch graphic-designer
- Saskia de Haas, Dutch cellist
- Troy de Haas (born 1979), Australian athlete
- Walter de Haas (1886–1819?), better known under the pseudonym Hanns Günther, German author, translator, and publisher of popular scientific works
- Wander Johannes de Haas (1878–1960), Dutch physicist
- William de Haas (1830–1880), Dutch-born American painter