Count Michał Jerzy Wandalin Mniszech (1748–1806) was a Polish nobleman.
Michal became Colonel in 1757, Crown Cupbearer in 1777, Lithuanian Grand Secretary in 1778, Chief of the Royal Chancellery in 1780. He served also as Lithuanian Court Marshal from 1781 until 1783 and Crown Grand Marshal from 1783 until 1793. In 1797 he was appointed Privy Councillor of state by Paul I. He was starosta of Lublin, Jawor, Słonim and Rostoki.
As one of the senators he participated in the Great Sejm.
Awards
- Knight of the Order of the White Eagle
150px|thumb|left|His wife, [[Urszula Zamoyska by Dmitri Levitsky.]]