This article is about the modern county, for the historical one see Jász-Nagykun-Szolnok (former county).
Jász-Nagykun-Szolnok is the name of an administrative county (comitatus or megye) in Hungary. It lies in central Hungary and shares borders with the Hungarian counties Pest, Heves, Borsod-Abaúj-Zemplén, Hajdú-Bihar, Békés, Csongrád, and Bács-Kiskun. The rivers Tisza and Körös flow through the county. The capital of Jász-Nagykun-Szolnok county is Szolnok. Its area is 5582 km². Before approximately 1990, the name of the county was Szolnok. The county is also part of the Danube-Kris-Mures-Tisa (Duna-Körös-Maros-Tisza) euroregion. The county is named after the Cumans (Kun) who settled there, among other places.