Giannini is a surname of Italian origin. The name refers to:
Adriano Giannini (born 1971), Italian actorAmadeo Giannini (1870–1949), Italian-American banker; founder of Bank of AmericaDusolina Giannini (1902–1986), Italian-American opera sopranoEttore Giannini (1912–1990), Italian screenwriter and film directorFrida Giannini (born 1972), Italian fashion designerGiancarlo Giannini (born 1942), Italian actorGiuseppe Giannini (born 1964), Italian professional football playerJoe Giannini (1888–1942), American professional baseball playerJohn Giannini (contemporary), American college basketball coachStefania Giannini (born 1960), current Italian Minister of Education, Universities and ResearchVittorio Giannini (1903–1966), American composer