The Order of Saint Stanislaus, also spelled Stanislas, was a Polish order of knighthood founded in 1765 by King Stanisław August Poniatowski of the Polish–Lithuanian Commonwealth. It remained under the Kingdom of Poland between 1765 and 1831. In 1831 it was incorporated under the Russian Empire until the Russian Revolution (1917).

Stanisław II August, known also by his regnal Latin name Stanislaus II Augustus, and as Stanisław August Poniatowski, was King of Poland and Grand Duke of Lithuania from 1764 to 1795, and the last monarch of the Polish–Lithuanian Commonwealth.