Wiksin [ˈvikɕin] is a village in the administrative district of Gmina Grudusk, within Ciechanów County, Masovian Voivodeship, in east-central Poland. It lies approximately 3 kilometres (2 mi) north of Grudusk, 25 km (16 mi) north of Ciechanów, and 100 km (62 mi) north of Warsaw.