Andrzej Leszczyński (1606–1651) was Voivode of Dorpat Voivodeship,[1] Imperial Count and a supporter of Polish Calvinists.
After finishing his education in 1636, he returned to the Polish–Lithuanian Commonwealth, and after the death of his father he inherited Baranów Sandomierski and nearby lands in Sandomierz Voivodeship, Stary Czartorysk and Nowy Czartorysk in Wołyń Voivodeship, and starostwo dubieńskie.
He was married three times: first with Anna Korecka, then (in 1643) with Katarzyna Niemirycz (a Polish Brethren), and finally with Krystyna Kalinowska, widow of Konstanty Wiśniowiecki.
He had only one son, Samuel Leszczyński, born in 1637, who inherited his father's fortune.
He also closed down the Calvinist churches in Baranów Sandomierski and Beresteczko, which he saw as a threat to Leszno.