Nord-Trøndelag County Municipality (Norwegian: Nord-Trøndelag fylkeskommune) was the regional governing administration of the old Nord-Trøndelag county in Norway. The county municipality was established in its current form on 1 January 1976 when the law was changed to allow elected county councils in Norway. The county municipality was dissolved on 1 January 2018, when Nord-Trøndelag was merged with the neighboring Sør-Trøndelag county, creating the new Trøndelag county which is led by the Trøndelag County Municipality.