Cities and towns are marked in bold and market towns in italics: Albrechtice v Jizerských horách – Bedřichov – Dalešice – Desná – Držkov – Frýdštejn – Harrachov – Jablonec nad Nisou – Janov nad Nisou – Jenišovice – Jílové u Držkova – Jiřetín pod Bukovou – Josefův Důl – Koberovy – Kořenov – Líšný – Loužnice – Lučany nad Nisou – Malá Skála – Maršovice – Nová Ves nad Nisou – Pěnčín – Plavy – Pulečný – Radčice – Rádlo – Rychnov u Jablonce nad Nisou – Skuhrov – Smržovka – Tanvald – Velké Hamry – Vlastiboř – Zásada – Železný Brod – Zlatá Olešnice Jablonec nad Nisou District borders Poland in the northeast.

The highest point of the district is the mountain Luboch in Harrachov with an elevation of 1,296 m (4,252 ft).

The lowest point is the river bed of the Jizera in Malá Skála at 254 m (833 ft).

The entire north of the district belongs to the Jizerské hory Protected Landscape Area.

The R/35 expressway, the continuation of the D10 motorway from Prague to Liberec, runs along the western border of the district.