The surnames Bitter, de Bitter or Von Bitter may refer to:
Billy Bitter (born 1988), an American lacrosse player Francis Bitter (1902–1967), an American physicist who invented the Bitter electromagnet, which uses circular metal plates instead of wire coils Friedrich August Georg Bitter (1873–1927), a German botanist and lichenologist Johannes Bitter (born 1982), a German team handball player Karl Bitter (1867–1915), an Austrian-born United States sculptor Karl Hermann Bitter (1813–1885), Prussian statesman (1919–1945), Dutch resistance fighter forced to collaborate with the German regime after his capture
Peter von Bitter (living), a German-born Canadian palaeontologist Pieter de Bitter (ca. 1620–1666), a 17th-century Dutch officer of the Dutch East India Company Susan Bitter Smith (living), an Arizona Republican politician Theo Bitter (1916–1994), a Dutch graphic artist, painter and draftsman.
See also Bitter (disambiguation)