The 1st constituency of Jász-Nagykun-Szolnok County (Hungarian: Jász-Nagykun-Szolnok megyei 01. számú országgyűlési egyéni választókerület) is one of the single member constituencies of the National Assembly, the national legislature of Hungary.

[2] Since 2018, it has been represented by Mária Kállai of the Fidesz–KDNP party alliance.

The 1st constituency is located in western part of Jász-Nagykun-Szolnok County.

The constituency was first represented by Ildikó Bene of the Fidesz from 2014 to 2018.

[4] Mária Kállai of the Fidesz was elected in 2018[5] and she was re-elected in 2022.