Jablonec nad Nisou ([ˈjablonɛts ˈnad ɲɪsou] ⓘ; German: Gablonz an der Neiße) is a city in the Liberec Region of the Czech Republic.

Most of the built-up area lies in the eastern tip of the Zittau Basin, and it is surrounded with the Jizera Mountains in the north, east and south.

The northern part of the municipal territory also belongs into the Jizera Mountains Protected Landscape Area.

The highest point of Jablonec nad Nisou is located on the slopes in the southeastern part of the territory, with an altitude of 758 m (2,487 ft).

Jablonec nad Nisou is situated at the confluence of the rivers Lusatian Neisse and Bílá Nisa.

In August 1469, the village was burned to the ground by troops of rebelling Lusatians in the war between them and King George of Poděbrady.

[3][6] In the first half of the 17th century, Jablonec was owned by Albrecht von Wallenstein, who sold it to the Desfours family.

Franco-Prussian War in 1870–1871 damaged competitors in the production of glass and jewelry, and the Jablonec traders seized the foreign markets.

[6] Historian Peter Hinks, writing about the various types of Late Victorian jewellery sold by British and American companies at the turn of the 20th century, noted that "The Bohemian garnet jewellery sold by Moore and Evans [in Chicago] was the product of an industry based in the town of Gablonz, now Jablonec.

In October 1938, Jablonec was annexed to Nazi Germany after the Munich Agreement, and was administered as a part of Reichsgau Sudetenland until 1945.

Jablonec nad Nisou shares the tramway line which connects it to its neighbouring city of Liberec.

Before the World War II, a number of ethnic German football clubs existed in Gablonz, Fortuna, DSK and BSK.

[13] The historical city centre is formed by squares Dolní, Mírové, Horní, and Anenské, which lies close to each other, and their surroundings.