Rozniszew [rɔzˈniʂɛf] is a village in the administrative district of Gmina Magnuszew, within Kozienice County, Masovian Voivodeship, in east-central Poland. It lies approximately 9 kilometres (6 mi) north-west of Magnuszew, 31 km (19 mi) north-west of Kozienice, and 51 km (32 mi) south-east of Warsaw.