Łęg Starościński [ˈwɛnk starɔɕˈt͡ɕiɲski] is a village in the administrative district of Gmina Lelis, within Ostrołęka County, Masovian Voivodeship, in east-central Poland. It lies approximately 8 kilometres (5 mi) south-east of Lelis, 10 km (6 mi) north-east of Ostrołęka, and 111 km (69 mi) north-east of Warsaw.