Kolonia Trzepnica [kɔˈlɔɲa tʂɛpˈnit͡sa] is a village in the administrative district of Gmina Łęki Szlacheckie, within Piotrków County, Łódź Voivodeship, in central Poland. It lies approximately 9 kilometres (6 mi) west of Łęki Szlacheckie, 23 km (14 mi) south of Piotrków Trybunalski, and 67 km (42 mi) south of the regional capital Łódź.