Nowosady [nɔvɔˈsadɨ] is a village in the administrative district of Gmina Sejny, within Sejny County, Podlaskie Voivodeship, in north-eastern Poland, close to the border with Lithuania. It lies approximately 6 kilometres (4 mi) north of Sejny and 118 km (73 mi) north of the regional capital Białystok.