Ciemne [ˈt͡ɕɛmnɛ] is a village in the administrative district of Gmina Radzymin, within Wołomin County, Masovian Voivodeship, in east-central Poland. It lies approximately 3 kilometres (2 mi) south of Radzymin, 6 km (4 mi) north-west of Wołomin, and 24 km (15 mi) north-east of Warsaw.