Stylianos Mavromichalis (Greek: Στυλιανός Μαυρομιχάλης) (1902 – 30 October 1981) was a Greek politician and Prime Minister.
Born in Mani, Stylianos was a descendant of the well-known Petros Mavromichalis that participated in the Greek War of Independence.
He studied law and was president of the Areopagus (Court of Cassation; Greek: Άρειος Πάγος), the Supreme Court of Greece. He was prime minister for a very short period, from 29 September to the 8 November 1963, of a transitional government. He died in Athens.