Łoniów [ˈwɔɲuf] is a village in Sandomierz County, Świętokrzyskie Voivodeship, in south-central Poland. It is the seat of the gmina (administrative district) called Gmina Łoniów. It lies approximately 21 kilometres (13 mi) south-west of Sandomierz and 74 km (46 mi) south-east of the regional capital Kielce.