Krzewo [ˈkʂɛvɔ] is a village in the administrative district of Gmina Piątnica, within Łomża County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately 13 kilometres (8 mi) south-east of Piątnica, 12 km (7 mi) east of Łomża, and 62 km (39 mi) west of the regional capital Białystok.