Quennell is a surname. Notable people with the surname include:
C. H. B. Quennell (1872–1935), architect, designer, illustrator and writer Frank Quennell (born 1956), politician Joan Quennell (1923–2006), politician Marjorie Quennell (1884–1972), author/illustrator Peter Quennell (1905–1993), biographer
See also Nanaimo/Quennell Lake Water Aerodrome Quenelle Quinnell