Ruda Bugaj [ˈruda ˈbuɡai̯] is a village in the administrative district of Gmina Aleksandrów Łódzki, within Zgierz County, Łódź Voivodeship, in central Poland. It lies approximately 4 kilometres (2 mi) north-west of Aleksandrów Łódzki, 11 km (7 mi) west of Zgierz, and 15 km (9 mi) north-west of the regional capital Łódź.