Mystkowo [mɨstˈkɔvɔ] is a village in the administrative district of Gmina Baboszewo, within Płońsk County, Masovian Voivodeship, in east-central Poland. It lies approximately 4 kilometres (2 mi) west of Baboszewo, 13 km (8 mi) north-west of Płońsk, and 75 km (47 mi) north-west of Warsaw.