Gremzdy Polskie [ˈɡrɛmzdɨ ˈpɔlskʲɛ], is a village in the administrative district of Gmina Krasnopol, within Sejny County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately 4 kilometres (2 mi) south of Krasnopol, 12 km (7 mi) west of Sejny, and 108 km (67 mi) north of the regional capital Białystok.

Gremzdy Polskie is home to Wigre Lake, as well as many cows and farms here and there.