Fiorello may refer to:

• Fiorello!, a Broadway musical
• Fiorello! (album), a 1960 album by Oscar Peterson
• Rosario Fiorello, also known as simply Fiorello, Italian singer and TV host
• Fiorello H. La Guardia, former mayor of New York City
• Fiorello I and Fiorello II, thoroughbred showjumpers ridden by Raimondo D'Inzeo

Fiorello! is a musical about New York City mayor Fiorello H. LaGuardia, a reform Republican who took on the Tammany Hall political machine. The book is by Jerome Weidman and George Abbott, drawn substantially from the 1955 volume Life With Fiorello by Ernest Cuneo, with lyrics by Sheldon Harnick, and music by Jerry Bock. It is one of only eight musicals to win the Pulitzer Prize for Drama.