Antoni Leszczewicz (Belarusian: Антоній Ляшчэвіч, romanized: Antonij Liaščevič; 30 September 1890 – 18 February 1943) was a Polish-Belarusian Marian Father and Roman Catholic priest.

He was a missionary in China for two decades in the interwar period.

He is one of the 108 Martyrs of World War II who was burned alive with a group of parishioners by the Nazis in Belarus in 1943.

He was beatified by Pope John Paul II in the 1990s.

This article about a Polish Catholic cleric is a stub.