Długi Kąt [ˈdwuɡʲi ˈkɔnt] is a village in the administrative district of Gmina Biała Piska, within Pisz County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 10 kilometres (6 mi) south of Biała Piska, 18 km (11 mi) south-east of Pisz, and 105 km (65 mi) east of the regional capital Olsztyn.