Wielki Łęck (Polish pronunciation: [ˈvjɛlkʲi ˈwɛntsk]) is a village in the administrative district of Gmina Płośnica, within Działdowo County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 8 kilometres (5 mi) south-west of Płośnica, 16 km (10 mi) west of Działdowo, and 72 km (45 mi) south-west of the regional capital Olsztyn.