Michał Hieronim Krasiński (1712 – May 25, 1784) was a Polish noble known for being one of the leaders of Bar Confederation (1768–1772). He was cupbearer of Stężyca, podkomorzy of Różan, starosta of Opiniogóra, and envoy to many Sejms.
He was a captain in August III army. He was a member of parliament in 1748 and 1750 as a deputate from Sandomierz voivodeship and in 1756, 1758 and 1760.
The Bar Confederation (Polish: Konfederacja barska; 1768–1772) was an association of Polish nobles (szlachta) formed at the fortress of Bar in Podolia (now Ukraine), in 1768 to defend the internal and external independence of the Polish–Lithuanian Commonwealth against Russian political influence and against King Stanislaus II Augustus with Polish reformers, who were attempting to limit the power of the Commonwealth's wealthy magnates.
The founders of the Bar Confederation included the magnates Adam Stanisław Krasiński, the bishop of Kamieniec, Karol Stanisław Radziwiłł, Casimir Pulaski, his father and brothers and Michał Hieronim Krasiński. Its creation led to a civil war and contributed to the First Partition of Poland. Maurice Benyovszky was the best known European Bar Confederation volunteer, supported by Roman Catholic France and Austria. Some historians consider the Bar Confederation the first Polish uprising.