Ludwinowo Dębskie [ludviˈnɔvɔ ˈdɛmpskʲɛ] is a village in the administrative district of Gmina Serock, within Legionowo County, Masovian Voivodeship, in east-central Poland. It lies approximately 12 kilometres (7 mi) west of Serock, 12 km (7 mi) north of Legionowo, and 33 km (21 mi) north of Warsaw.