Marszywiec [marˈʂɨvjɛt͡s] is a village in the administrative district of Gmina Zelów, within Bełchatów County, Łódź Voivodeship, in central Poland. It lies approximately 8 kilometres (5 mi) south-east of Zelów, 9 km (6 mi) north-west of Bełchatów, and 41 km (25 mi) south of the regional capital Łódź.