Lesiny Wielkie [lɛˈɕinɨ ˈvjɛlkʲɛ] (German: Groß Leschienen) is a village in the administrative district of Gmina Wielbark, within Szczytno County, Warmian-Masurian Voivodeship, in northern Poland.

It lies approximately 12 kilometres (7 mi) east of Wielbark, 22 km (14 mi) south-east of Szczytno, and 61 km (38 mi) south-east of the regional capital Olsztyn.