Mansfeldy [mansˈfɛldɨ] is a village in the administrative district of Gmina Iłowo-Osada, within Działdowo County, Warmian-Masurian Voivodeship, in northern Poland. It lies approximately 7 kilometres (4 mi) north-west of Iłowo-Osada, 5 km (3 mi) south-east of Działdowo, and 67 km (42 mi) south of the regional capital Olsztyn.