Fitzwater is a patronymic surname of English origin, being a variant of Fitz Walter, 'son of Walter'. Notable people with the surname include:

• Jack Fitzwater (born 1997), English footballer

• Jessica Fitzwater, American politician

• Marlin Fitzwater (born 1942), press secretary for presidents Ronald Reagan and George H. W. Bush

• Paul Fitzwater (born 1959), Republican member of the Missouri House of Representatives

• Rodger Fitzwater (born 1962), Democrat member of the Missouri House of Representatives

• Sidney A. Fitzwater (born 1953), American jurist

• Travis Fitzwater (born 1981), Republican member of the Missouri House of Representatives

• Darryl Fitzwater, American Anglican bishop

See also

• Fitzwater Wray (1869–1938), British cycling journalist

• Fitzwater Station, a restaurant and former stop along the Underground Railroad

• Thomas Fitzwater Elementary School, located in the Upper Dublin School District of Pennsylvania