Strusin [ˈstruɕin] is a village in the administrative district of Gmina Sońsk, within Ciechanów County, Masovian Voivodeship, in east-central Poland. It lies approximately 3 kilometres (2 mi) north-west of Sońsk, 9 km (6 mi) south-east of Ciechanów, and 68 km (42 mi) north of Warsaw.