Slaná is a village in Semily District, in the Liberec Region, Czechia. Slaná lies at 358 m above sea level, 0.6 km from the Giant mountains. It has 674 inhabitants (2024). The nearest city is Jablonec nad Nisou, 19.9 km to the northwest. Near the border: Poland, 22 km. Among the landmarks around are Trosky Castle (10.1 km), Kost Castle (17.2 km) and Valdštejn Castle (11.8 km). Among the natural features are Zebín (14.5 km) and Przełęcz Szklarska (27 km).