Coordinates: 48°17′N 21°11′E / 48.28°N 21.19°E
Abaúj (Latin: comitatus Abaujvariensis, Slovak: Abov, German: Neuburg or Abaujwar) is a historic administrative county (comitatus) of the Kingdom of Hungary. In parts of the 19th century, and in the beginning of the 20th century, it was united with Torna County to form Abaúj-Torna (Slovak: Abov-Turňa) county. Its territory is now in eastern Slovakia and north-eastern Hungary. Today Abaúj and Abov are only informal designations of the corresponding territories in Hungary and Slovakia.
Abaúj was situated some 20 km on both sides along the Hornád (Hungarian: Hernád) river between (including) Košice and (excluding) Miskolc.
Abaúj shared borders with the Comitatus Scepusiensis (Hungarian: Szepes, German: Zips, Slovak: Spiš), Comitatus Sarossiensis (Hungarian: Sáros, Slovak: Šariš), Comitatus Zempliniensis (Hungarian: Zemplén, Slovak: Zemplín), Comitatus Borsodiensis (Hun: Borsod) and Comitatus Tornensis (Hungarian: Torna, Slovak: Turňa).