Kobylnica [kɔbɨlˈnit͡sa] is a village in the administrative district of Gmina Maciejowice, within Garwolin County, Masovian Voivodeship, in east-central Poland. It lies approximately 5 kilometres (3 mi) south of Maciejowice, 28 km (17 mi) south of Garwolin, and 74 km (46 mi) south-east of Warsaw.