Głęboczek [ɡwɛmˈbɔt͡ʂɛk] is a village in the administrative district of Gmina Perlejewo, within Siemiatycze County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately 6 kilometres (4 mi) west of Perlejewo, 30 km (19 mi) north-west of Siemiatycze, and 78 km (48 mi) south-west of the regional capital Białystok.