Plewnik Pierwszy [ˈplɛvnik ˈpjɛrfʂɨ] is a village in the administrative district of Gmina Wartkowice, within Poddębice County, Łódź Voivodeship, in central Poland. It lies approximately 5 kilometres (3 mi) south of Wartkowice, 7 km (4 mi) north-east of Poddębice, and 35 km (22 mi) north-west of the regional capital Łódź.