Kaleń Pierwszy [ˈkalɛɲ ˈpjɛrfʂɨ] is a village in the administrative district of Gmina Sobolew, within Garwolin County, Masovian Voivodeship, in east-central Poland. It lies approximately 21 kilometres (13 mi) south of Garwolin and 74 km (46 mi) south-east of Warsaw.