Drinkwater is a surname. It is often the anglicized form of the Italian surname Bevilacqua. Notable people with the surname include:
Arthur Thomas Drinkwater (1894–1972), Australian-born World War I flying ace
Ben Drinkwater (1910–1949), motor-cycle racer
Bert Drinkwater (1895–1947), Australian footballer
Carol Drinkwater (b. 1948), Anglo-Irish actress and author
Charles Drinkwater (soccer), American soccer player
Danny Drinkwater (b. 1990), English football player
Graham Drinkwater (1875–1946), Canadian ice hockey player, businessman and philanthropist
Harry Drinkwater (1844–1895), British architect
Dr Harold Drinkwater (1855-1925) British botanical artist
John Drinkwater (musician, technologist), (b. 1957), English musician and sound technologist
John Drinkwater (playwright), (1882–1937), English poet and dramatist
Josh Drinkwater (b. 1992), Australian professional rugby player
Peter Drinkwater (1750–1801) English textile businessman
Ray Drinkwater (1931–2008), British soccer player
Ros Drinkwater (b. 1944), Scottish-born actress
Sean T. Drinkwater (b. 1972) American musician
Skip Drinkwater American record producer
Terry Drinkwater (1936–1989), American television and radio journalist
William Drinkwater (1812–1909), Manx judge
Fictional characters:
Gerris Drinkwater, in A Song of Ice and Fire by George R. R. Martin
Nathaniel Drinkwater, protagonist of a series of novels by Richard Woodman