Kudłaczewo [kudwaˈt͡ʂɛvɔ] is a village in the administrative district of Gmina Wąsosz, within Grajewo County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately 8 kilometres (5 mi) north-east of Wąsosz, 12 km (7 mi) south of Grajewo, and 70 km (43 mi) north-west of the regional capital Białystok.