Pniaki [ˈpɲaki] is a village in the administrative district of Gmina Secemin, within Włoszczowa County, Świętokrzyskie Voivodeship, in south-central Poland. It lies approximately 4 kilometres (2 mi) west of Secemin, 16 km (10 mi) south-west of Włoszczowa, and 60 km (37 mi) west of the regional capital Kielce.