Jilemnice is a town (město) in Semily District, in the Liberec Region, Czechia. Jilemnice lies at 451 m above sea level, at the foot of the Giant mountains. It has 5,377 inhabitants (2024). The nearest city is Jablonec nad Nisou, 27 km to the west. Near the border: Poland, 19 km. Among the landmarks around are Trosky Castle (22 km), Valdštejn Castle (25 km) and Augustinian monastery in Vrchlabí (7.4 km). Among the natural features are Przełęcz Karkonoska (19.4 km) and Mumlava Waterfall (18.3 km).