Kowalewko [kɔvaˈlɛfkɔ] is a village in the administrative district of Gmina Glinojeck, within Ciechanów County, Masovian Voivodeship, in east-central Poland. It lies approximately 2 kilometres (1 mi) north-west of Glinojeck, 25 km (16 mi) west of Ciechanów, and 85 km (53 mi) north-west of Warsaw.