Kráľovský Chlmec (Slovak pronunciation: [ˈkraːʎɔwskiː ˈxl̩mets]; until 1948 Kráľovský Chlumec, Hungarian: Királyhelmec) is a town in the Trebišov District in the Košice Region of south-eastern Slovakia.

In 1848-1849, residents of Kráľovský Chlmec took part in the Civic Revolution and War of Independence.

After the Second world war it became part of Czechoslovakia again in 1945, officially in 1947, according to the Paris Peace Treaties.

Kráľovský Chlmec lies at an altitude of 130 metres (427 ft) above sea level and covers an area of 23.08 square kilometres (8.9 sq mi).

[5] It is located in the southern part of the Eastern Slovak Lowland, only around 5 kilometres (3 mi) north of Hungarian and 12 kilometres (7 mi) west of Ukrainian border.