Gardoš is an urban neighborhood of Belgrade, the capital of Serbia. It is located in Belgrade's municipality of Zemun. Located on the slopes of the hill of the same name, with its tower and preserved old architecture, Gardoš is the major historical landmark of Zemun. Remnants of the Gardoš Fortress, built in the 14th century and the 15th century, are the oldest surviving parts of Zemun.

Zemun is a municipality in the city of Belgrade, Serbia. Zemun was a separate town that was absorbed into Belgrade in 1934. It lies on the right bank of the Danube river, upstream from downtown Belgrade. The development of New Belgrade in the late 20th century expanded the continuous urban area of Belgrade and merged it with Zemun.