Mroczki (Polish pronunciation: [ˈmrɔt͡ʂkʲi]) is a village in the administrative district of Gmina Trzcianne, within Mońki County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately 6 kilometres (4 mi) north of Trzcianne, 10 km (6 mi) west of Mońki, and 45 km (28 mi) north-west of the regional capital Białystok.