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. The constituency standard abbreviation: Jász-Nagykun-Szolnok 01. OEVK. Since 2018, it has been represented by Mária Kállai of the Fidesz–KDNP party alliance.