Kopcie [ˈkɔpt͡ɕɛ] is a village in the administrative district of Gmina Domanice, within Siedlce County, Masovian Voivodeship, in east-central Poland. It lies approximately 3 kilometres (2 mi) west of Domanice, 18 km (11 mi) south-west of Siedlce, and 81 km (50 mi) east of Warsaw.