Ulasek [uˈlasɛk] is a village in the administrative district of Gmina Somianka, within Wyszków County, Masovian Voivodeship, in east-central Poland. It lies approximately 3 kilometres (2 mi) north-west of Somianka, 12 km (7 mi) west of Wyszków, and 46 km (29 mi) north-east of Warsaw.