Pieńki [ˈpjɛɲki] is a village in the administrative district of Gmina Serokomla, within Łuków County, Lublin Voivodeship, in eastern Poland. It lies approximately 4 kilometres (2 mi) south of Serokomla, 28 km (17 mi) south of Łuków, and 50 km (31 mi) north of the regional capital Lublin.