The Žumberak Mountains (Croatian: Žumberačka Gora, Slovene: Žumberška gora, historic German name: Uskokengebirge) is a range of hills and mountains in northwestern Croatia and southeastern Slovenia, extending from the southwest to the northeast between the Krka and the Kupa. It covers an area of 430 km2 (170 sq mi). The geographically unified massif consists of two parts, separated by the rivelets Bregana and Žumberačka rijeka. The northeastern part is the Samobor Hills (Croatian: Samoborsko gorje) with the foothills. The central and western part is named Žumberak Hills (Croatian: Žumberačko gorje, Žumberak). Its northwesternmost part, named Gorjanci, lies in Slovenia. The highest peak of the range is Sveta Gera (Trdinov vrh) on the border between Croatia and Slovenia, being 1,178 m (3,865 ft) high. Since 1999, an area of the range in Croatia has been protected as the nature park Žumberak–Samobor Hills.
Žumberak Mountains lie near and partly on the border between Croatia and Slovenia, which, mostly, passes through the highest parts of the massif. Croatian part of the mountain range is in Central Croatia, mostly in western part of Zagreb County and a smaller part is in Karlovac County. Slovene part belongs to the traditional region of Lower Carniola. The Žumberak Mountains is situated only 25 km 25 km (16 mi) from Croatian capital, Zagreb. Cities near this range are Samobor, Jastrebarsko, and Ozalj in Croatia, and Novo Mesto, Brežice, and Kostanjevica na Krki in Slovenia. The range is on territory of four cities:
Žumberak is a village and a municipality in Croatia in the Zagreb County. According to the 2011 census, there are 883 inhabitants, 98% of which are Croats. Žumberak municipality covers an area of 110 km2 (42 sq mi).
Settlements are: