Koson, Protected hill area in Szabolcs-Szatmár-Bereg County and Berehove Raion, Hungary and Ukraine.

Koson is the southern, Hungarian part of the Kaszonyi-hegy, a remnant of an island volcano that rises from the Bereg Plain near Barabás. Its flat plateau reaches 240 metres, the highest point in Szabolcs-Szatmár-Bereg County and the whole Great Hungarian Plain. The protected area covers 156.6 hectares within Hortobágy National Park, and a disused quarry on the south-west slope now holds a quarry lake.

Kaszonyi-hegy is the southern, Hungarian part of a hill whose summit lies on the Ukrainian side of the border; it takes its name from Mezőkaszony, the neighbouring village now in Ukraine. The hill is the remnant of an island volcano active in the Middle Pleistocene, built mainly of rhyolite lava, with perlite-forming eruptions and a final phase of plagioclase rhyolite lava. A quarry on its south-western side is disused and now holds a quarry lake.

The hill takes its name from Mezőkaszony, the village across the border in Ukraine. Since 1997 the Hungarian southern part has been a 156.6-hectare protected area managed by the Hortobágy National Park. Nature conservationists camp here in summer and ring birds, having recorded nearly 70 species on and around the hill.

The area can be explored year-round with several hiking paths that lead across the hills. These trails are marked and take visitors to viewpoints with clear views over the landscape.

The strictly protected ground beetle Carabus hampei ormayi, a Natura 2000 indicator species, lives on the hill; Hungarian conservationists also ring birds here in summer, recording close to 70 species, among them the collared flycatcher and the little owl.