Pierstnica [pjɛrstˈnit͡sa] is a village in the administrative district of Gmina Krośnice, within Milicz County, Lower Silesian Voivodeship, in south-western Poland.

It lies approximately 13 kilometres (8 mi) south-east of Milicz, and 40 kilometres (25 mi) north-east of the regional capital Wrocław.