Sojczyn Grądowy [ˈsɔi̯t͡ʂɨn ɡrɔnˈdɔvɨ] is a village in the administrative district of Gmina Grajewo, within Grajewo County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately 14 kilometres (9 mi) south-east of Grajewo and 64 km (40 mi) north-west of the regional capital Białystok.