Smrock-Kolonia [ˈsmrɔt͡sk kɔˈlɔɲa] is a village in the administrative district of Gmina Szelków, within Maków County, Masovian Voivodeship, in east-central Poland. It lies approximately 2 kilometres (1 mi) west of Szelków, 8 km (5 mi) south-east of Maków Mazowiecki, and 70 km (43 mi) north of Warsaw.