Oleszno [ɔˈlɛʂnɔ] is a village in the administrative district of Gmina Krasocin, within Włoszczowa County, Świętokrzyskie Voivodeship, in south-central Poland. It lies approximately 8 kilometres (5 mi) north-west of Krasocin, 12 km (7 mi) north-east of Włoszczowa, and 41 km (25 mi) west of the regional capital Kielce.