Marchionni is an Italian surname. Notable people with the surname include:
Bartolomeo Marchionni, Florentine merchant Carlo Marchionni (1702–1786), Italian architect Federica Marchionni (born 1971), Italian-American businesswoman Lorenzo Marchionni (born 1994), Italian footballer Marco Marchionni (born 1980), Italian footballer Roberto Marchionni (born 1965), pen name Menotti, Italian comic book artist and screenwriter