Upper Hungary

Upper Hungary is the usual English translation of Felvidék (lit.: "Upland"), the Hungarian term for the area that was historically the northern part of the Kingdom of Hungary, now mostly present-day Slovakia. The region has also been called Felső-Magyarország (lit: "Upper Hungary", Slovak: Horné Uhorsko).

During the Ottoman wars, Upper Hungary meant only the northeastern parts of the Hungarian Kingdom. The northwestern regions (present-day western and central Slovakia) belonged to Lower Hungary. Sometime during the 18th or 19th centuries, Upper Hungary began to imply the whole northern regions of the kingdom. The population of Upper Hungary was mixed and mainly consisted of Slovaks, Hungarians, Germans and Ruthenians. The first complex demographic data are from the 18th century, in which Slovaks constituted the majority population in Upper Hungary. Slovaks called this territory "Slovensko" (Slovakia), which term appears in written documents from the 15th century, but it was not precisely defined and the region inhabited by Slovaks held no distinct legal, constitutional, or political status within Upper Hungary.

Historically there are different meanings:

1. The older Hungarian term Felső-Magyarország (literally: "Upper Hungary"; Slovak: Horné Uhorsko; German: Oberungarn; Ukrainian: Верхня Угорщина; Russian: Верхняя Венгрия) formally referred to what is today Slovakia in the 16th-18th centuries and informally to all the northern parts of the Kingdom of Hungary in the 19th century.

2. There are some 16th-century sources which refer to the Slovak-inhabited territory of the Kingdom of Hungary as "Sclavonia" or "Slováky", names that distinguish the region ethnically as well as geographically.

...
Wikipedia