Karlewo [karˈlɛvɔ] is a village in the administrative district of Gmina Szczutowo, within Sierpc County, Masovian Voivodeship, in east-central Poland. It lies approximately 17 kilometres (11 mi) south of Szczutowo, 12 km (7 mi) south of Sierpc, and 114 km (71 mi) north-west of Warsaw.