Aleksandrów Duży [alɛkˈsandruf ˈduʐɨ] is a village in the administrative district of Gmina Sienno, within Lipsko County, Masovian Voivodeship, in east-central Poland. It lies approximately 8 kilometres (5 mi) east of Sienno, 12 km (7 mi) south-west of Lipsko, and 134 km (83 mi) south of Warsaw.