Osełków [ɔˈsɛu̯kuf] is a village in the administrative district of Gmina Łączna, within Skarżysko County, Świętokrzyskie Voivodeship, in south-central Poland. It lies approximately 2 kilometres (1 mi) north-east of Łączna, 15 km (9 mi) south-west of Skarżysko-Kamienna, and 19 km (12 mi) north-east of the regional capital Kielce.