Kleszczówek [klɛʂˈt͡ʂuvɛk] is a village in the administrative district of Gmina Rutka-Tartak, within Suwałki County, Podlaskie Voivodeship, in north-eastern Poland, close to the border with Lithuania. It lies approximately 13 kilometres (8 mi) south of Wiżajny, 23 km (14 mi) north of Suwałki, and 131 km (81 mi) north of the regional capital Białystok.

Until 31 December 2009 it was a part of gmina Wiżajny.