Sironi is a surname. Notable people with the surname include:
Andrea Sironi (born 1964), Italian academic Luca Sironi (born 1974), Italian cyclist Maria Bianca Cita Sironi (1924–2024), Italian geologist and paleontologist Mario Sironi (1885–1961), Italian Modernist painter Martina Sironi (born 1999), known professionally as Cmqmartina, Italian singer-songwriter