Mroga Dolna [ˈmrɔɡa ˈdɔlna] is a village in the administrative district of Gmina Rogów, within Brzeziny County, Łódź Voivodeship, in central Poland. It lies approximately 5 kilometres (3 mi) west of Rogów, 6 km (4 mi) north-east of Brzeziny, and 25 km (16 mi) east of the regional capital Łódź.