Kuski [ˈkuski] is a village in the administrative district of Gmina Rościszewo, within Sierpc County, Masovian Voivodeship, in east-central Poland. It lies approximately 4 kilometres (2 mi) south of Rościszewo, 9 km (6 mi) east of Sierpc, and 110 km (68 mi) north-west of Warsaw.