Fiala is a surname originating from the Czech lands. In Czech, Fiala means violet. Notable people with the surname include:
Anthony Fiala (1869–1950), American explorer, born in Jersey City, New Jersey
Art Fiala (1899–2005), one of the last surviving American World War I veterans
Barbara J. Fiala (born 1944), the current Commissioner of the New York State Department of Motor Vehicles
Benno Fiala von Fernbrugg (1890–1964), Austro-Hungarian fighter ace with 28 victories to his credit during World War I
Jan Fiala (born 1956), Czech football player
Jan Fiala (programmer), Czech programmer (author of PSPad)
Jean-Pierre Fiala (born 1969), retired Cameroonian football player who played for Canon Yaounde
Jim Fiala, chef who owns three restaurants in the St. Louis, Missouri area
John Fiala (born 1973), retired American football linebacker
Josef Fiala (1748–1816), composer, oboist, viola da gamba virtuoso, cellist, and pedagogue
Kevin Fiala (born 1996), Swiss ice hockey player, currently playing for the Nashville Predators in the National Hockey League
Ondrej Fiala (born 1987), ice hockey player, currently playing for HC Spartak Moscow in the Kontinental Hockey League
Radek Fiala (born 1986), professional ice hockey goaltender playing for HC Litvínov, in the Czech Extraliga
Zuzana Fialová (born 1974, Bratislava), a Slovak actress
Jacqueline Fiala (born 1984), an anesthesiologist