Čierna (Slovak pronunciation: [ˈtʂɪerna]; Hungarian: Ágcsernyő) is a village and municipality in the Trebišov District in the Košice Region of south-eastern Slovakia.

The village's name comes from the Hungarian personal name Csernő, or archaically, Cserna.

The Ág- prefix is in memory of Agh, a local landowner mentioned in a 1270 record, where the village is called Chernafewld.

The village lies at an altitude of 101 metres and covers an area of 4.244 km².

This article relating to the geography of the Trebišov District is a stub.