Myślin [ˈmɨɕlin] is a village in the administrative district of Gmina Bieżuń, within Żuromin County, Masovian Voivodeship, in east-central Poland. It lies approximately 3 kilometres (2 mi) east of Bieżuń, 13 km (8 mi) south of Żuromin, and 110 km (68 mi) north-west of Warsaw.