Rynek [ˈrɨnɛk] is a village in the administrative district of Gmina Wąsewo, within Ostrów Mazowiecka County, Masovian Voivodeship, in east-central Poland. It lies approximately 7 kilometres (4 mi) south-east of Wąsewo, 12 km (7 mi) north-west of Ostrów Mazowiecka, and 87 km (54 mi) north-east of Warsaw.