Zajączkowo [zajɔnt͡ʂˈkɔvɔ] is a village in the administrative district of Gmina Bakałarzewo, within Suwałki County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately 8 kilometres (5 mi) east of Bakałarzewo, 12 km (7 mi) west of Suwałki, and 111 km (69 mi) north of the regional capital Białystok.