Wólka Piotrowska [ˈvulka pjɔˈtrɔfska] is a village in the administrative district of Gmina Rajgród, within Grajewo County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately 10 kilometres (6 mi) south-west of Rajgród, 9 km (6 mi) north-east of Grajewo, and 75 km (47 mi) north-west of the regional capital Białystok.