Demir Kapija (Macedonian: Демир Капија [ˌdɛmir ˈkapija] ⓘ) is a small town in North Macedonia, located near the limestone gates of the same name.

In the earlier dates to the Paeonian era, a fortress was built on the mountain Ramniste, on the foothills of the Demir Kapija settlement and it is still there.

In the Middle Ages Demir Kapija was a Slav settlement, under the name of Prosek, while today's name originates from Turkish, meaning "The Iron Gate".

Newer wineries, like Popova Kula, have opened up additionally and paves the way for exports and economic stimulus of the region.

[citation needed] Demir Kapija is also a national monument of nature and an ornithological reserve, home to many rare species of birds and endemic plants.

A 10,500 ha site, encompassing the Vardar gorge, Celevecka river and Krastavec ridge, has been recognised as the Demir Kapija Gorge Important Bird Area (IBA) by BirdLife International because it supports populations of rock partridges, Egyptian vultures, short-toed snake-eagles, Levant sparrowhawks, eastern subalpine warblers, western rock nuthatches, eastern black-eared wheatears and black-headed buntings.