Dreństwo [ˈdrɛɲstvɔ] (also: Dręstwo) is a village in the administrative district of Gmina Bargłów Kościelny, within Augustów County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately 6 kilometres (4 mi) south-west of Bargłów Kościelny, 20 km (12 mi) south-west of Augustów, and 74 km (46 mi) north of the regional capital Białystok.