Hungarian border barrier, Border barrier at Hungary-Serbia frontier, Hungary

This installation is a border work along Hungary's southern frontier with Serbia and consists of a steel fence with barbed wire stretching roughly 109 miles (175 kilometers) in length. The structure connects several sections of different construction and ranges from tight mesh wire to taller elements with concrete anchors.

Construction began in 2015 as a response to the increased movement of people through the Balkan route into the European Union. Further expansion work followed in the years after and extended the installation with additional sections at other border parts.

The official Hungarian name is "határőrizeti célú ideiglenes kerítés" (temporary fence for border-control purposes). Signs along the barrier, such as the one reading "ÁLLAMHATÁR", "STATE BORDER", "STAATSGRENZE", inform migrants of the legal crossing points and that illegal border crossing is a criminal offence. The barrier was built by the Hungarian Defence Forces, with base materials prepared by prison inmates.

The barrier is a closed military installation; it cannot be visited or walked along. It runs through flat farmland and is visible only from public roads and from the Serbian side near Horgoš and from Röszke on the Hungarian side. Legal crossings are at official checkpoints such as Röszke–Horgoš, not along the fence.

The construction combines technologies from military border systems with standard commercial fencing material and thus creates a mix of different security standards. At some points the structure runs through agricultural areas and separates fields and grazing zones.