Piątnica Włościańska (Polish pronunciation: [pjɔntˈɲitsa vwɔɕˈtɕaj̃ska]) is a village in the administrative district of Gmina Piątnica, within Łomża County, Podlaskie Voivodeship, in north-eastern Poland. It lies approximately 1 kilometre (1 mi) east of Piątnica, 3 km (2 mi) north-east of Łomża, and 71 km (44 mi) west of the regional capital Białystok.