Jatne [ˈjatnɛ] is a village in the administrative district of Gmina Celestynów, within Otwock County, Masovian Voivodeship, in east-central Poland. It lies approximately 6 kilometres (4 mi) north of Celestynów, 10 km (6 mi) east of Otwock, and 31 km (19 mi) south-east of Warsaw. The first mention of the village dates back to 1866. During the years 1975-1998 the town administratively belonged to the province of Warsaw.