Michał Wiśniowiecki or Mykhailo Vyshnevetsky (1529–1584) was a Ruthenian noble (szlachcic) of the Polish–Lithuanian Commonwealth. He was a prince at Wiśniowiec, magnate, Hetman of the Registered Cossacks (1578–1581; appointed by Stephen Báthory), castellan of Bracław and Kijów (now Kyiv), starost of Czerkasy, Kaniów, Lubeka and Łojów.
Wisnowiecki was born before the Union of Lublin in the Grand Duchy of Lithuania. He was a cousin of Dmytro Vyshnevetsky; they were both grandsons of Mykhailo Vyshnevetsky-Zbarazky. As Hetman, he commanded the Registered Cossacks in battle during the Livonian War against Muscovy, especially in Siveria in the years 1580–1581.
Marriage and issue
Michał married Halszka Zenowiczówna h. Deszpot and had five children
Aleksander Wiśniowiecki (ca. 1560–1594), starost of Czerkasy, Kaniów, Korsuń Szewczenkowski, Lubeka and Łojów, married Helena Jełowiecka h. Jełowiecki
Michał Wiśniowiecki (died 1616), married Regina Mohyła, father of Jeremi Wiśniowiecki, grandfather of King Michał Korybut Wiśniowiecki
Jerzy Wiśniowiecki (died 1618), married Teodora Czaplica h. Kierdeja
Maryna Wiśniowiecka, married Teodor ks. Drucki-Horski h. Druck
Zofia Wiśniowiecka (1595 – died after 1612), married Jerzy Ostafi Tyszkiewicz h. Leliwa
He would become the great-grandfather of the future King of Poland, Michał Korybut Wiśniowiecki.