Kluczewsko [kluˈt͡ʂɛfskɔ] is a village in Włoszczowa County, Świętokrzyskie Voivodeship, in south-central Poland. It is the seat of the gmina (administrative district) called Gmina Kluczewsko. It lies approximately 9 kilometres (6 mi) north of Włoszczowa and 50 km (31 mi) west of the regional capital Kielce.