Białorzeczka [bjawɔˈʐɛt͡ʂka], is a village in the administrative district of Gmina Giby, within Sejny County, Podlaskie Voivodeship, in north-eastern Poland, close to the border with Lithuania. It lies approximately 9 kilometres (6 mi) south-west of Sejny and 105 km (65 mi) north of the regional capital Białystok.