Korytnica [kɔrɨtˈnit͡sa] is a village in the administrative district of Gmina Sulejów, within Piotrków County, Łódź Voivodeship, in central Poland. It lies approximately 7 kilometres (4 mi) north-west of Sulejów, 9 km (6 mi) east of Piotrków Trybunalski, and 51 km (32 mi) south-east of the regional capital Łódź.