Andrzej Stanisław Kostka Młodziejowski (1717–1780), of Ślepowron coat of arms, was a Polish–Lithuanian nobleman, politician and priest. Bishop of Przemyśl (1766–1768), bishop of Poznań (1768–1780), Deputy Chancellor of the Crown (1746–1767), Great Chancellor of the Crown (1767–1780).
He was one of the Polish nobles and politicians in service to the Russian embassy, from whom he received financial support. Supported their demands, including the First Partition of Poland. Accused of corruption, immorality and even of involvement with the murder of primate of Poland Władysław Aleksander Łubieński.