The 1st constituency of Nógrád County (Hungarian: Nógrád 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: Nógrád 01.

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

The 1st constituency is located in the eastern part of Nógrád County.

The constituency was first represented by Zsolt Becsó of the Fidesz from 2014 to 2018.