Olszowiec [ɔlˈʂɔvjɛt͡s] is a village in the administrative district of Gmina Iłów, within Sochaczew County, Masovian Voivodeship, in east-central Poland. It lies approximately 3 kilometres (2 mi) south-east of Iłów, 17 km (11 mi) north-west of Sochaczew, and 66 km (41 mi) west of Warsaw.