Ciasna [ˈt͡ɕasna] is a village in Lubliniec County, Silesian Voivodeship, in southern Poland. It is the seat of the gmina (administrative district) called Gmina Ciasna. It lies approximately 10 kilometres (6 mi) north-west of Lubliniec and 63 km (39 mi) north-west of the regional capital Katowice.