Jász-Nagykun-Szolnok in the context of Csongrád (county)

Kunság (German: Kumanien; Latin: Cumania), later also known as Jászkunság or Jászkun kerület (lit. "Jassic–Cuman District"), is a historical, ethnographic and geographical region in Hungary, corresponding to a former political entity created by and for the Cumans or Kuns. It is currently divided between the counties of Bács-Kiskun and Jász-Nagykun-Szolnok; these correspond roughly to two distinct traditional entities, Little Cumania and Greater Cumania, which are longitudinally separated by the Tisza. Kunság and its subdivisions were first organized by the Kingdom of Hungary to accommodate semi-nomadic Cumans escaping from the Mongol Empire. The Cuman enclaves were sometimes incorporated with Jazygia, which was similarly set up and named for Ossetian nomads.

Kunság was the result of a second and final Cuman colonization in Hungary; while not the only Cuman-inhabited area, it remained the only centre of Cuman self-rule after the end of Arpadian Hungary. Tradition dates its emergence to 1279, when Ladislaus IV, a half-Cuman King of Hungary, granted its first set of fiscal and judicial privileges. These were confirmed in the 15th century, when Cumans began organizing themselves into "seats" overseen by a Palatine of the Kingdom. However, the consolidation of feudalism created dissatisfaction across the region, leading to its participation in György Dózsa's uprising of 1514.

Heves county (Hungarian: Heves vármegye, pronounced [ˈhɛvɛʃ]) lies in northern Hungary, between the right bank of the river Tisza and the Mátra and Bükk mountains. It shares borders with the Hungarian counties Pest, Nógrád, Borsod-Abaúj-Zemplén and Jász-Nagykun-Szolnok. Eger is the county seat.

Békés (Hungarian: Békés vármegye, pronounced [ˈbeːkeːʃ], Romanian: Județul Bichiș) is an administrative division (county or vármegye) in south-eastern Hungary, on the border with Romania. It shares borders with the Hungarian counties Csongrád-Csanád, Jász-Nagykun-Szolnok, and Hajdú-Bihar. The capital of Békés county is Békéscsaba. The county is also part of the Danube-Kris-Mures-Tisa euroregion.

The Jász (Latin: Jazones) are an Iranian ethnic group of Eastern Iranic descent who have lived in Hungary since the 13th century. They live mostly in a region known as Jászság, which comprises the north-western part of Jász-Nagykun-Szolnok county. They are sometimes known in English by the exonym Jassic and are also known by the endonyms Iasi and Jassy. They originated as a nomadic Alanic people from the Pontic steppe.

Jászság ("Jaszygia", Latin: Jazigia) is a historical, ethnographical and geographical region in Hungary. Its 1,161 km (448 sq mi) territory is situated in the north-western part of the Jász-Nagykun-Szolnok county. The main town in the region is Jászberény. Jászság is inhabited by the Jassic people, an Iranian ethnic group whose linguistic base is preserved by the Ossetians. The population of the region is around 85,000.

Nagykunság ("Greater Cumania", Latin: Cumania Major) is a historical and geographical region in Hungary situated in the current Jász-Nagykun-Szolnok county between Szolnok and Debrecen. Like other historical European regions called Cumania, it is named for the Cumans, a nomadic tribe of pagan Kipchaks that settled the area. Its territory is 1,196 km.