Mario Giorgini (Massa, 19 March 1900 – Florence, 23 January 1977) was an Italian naval officer during World War II. He commanded the I Flottiglia MAS (later renamed Decima Flottiglia MAS), the special operations unit of the Royal Italian Navy, from February 1940 until his capture during an attempt to carry out a manned torpedo raid on Alexandria in September of the same year. After the war he became an admiral in the Marina Militare.