Strzelnia [ˈstʂɛlɲa] is a village in the administrative district of Gmina Grudusk, within Ciechanów County, Masovian Voivodeship, in east-central Poland. It lies approximately 2 kilometres (1 mi) south-east of Grudusk, 21 km (13 mi) north of Ciechanów, and 96 km (60 mi) north of Warsaw.