Antoniewko [antɔˈɲɛfkɔ] is a settlement in the administrative district of Gmina Bierzwnik, within Choszczno County, West Pomeranian Voivodeship, in north-western Poland. It lies approximately 10 kilometres (6 mi) north-east of Bierzwnik, 26 km (16 mi) east of Choszczno, and 87 km (54 mi) south-east of the regional capital Szczecin.