Frol is a former municipality in the old Nord-Trøndelag county, Norway. The 140-square-kilometre (54 sq mi) municipality existed from 1856 until its dissolution in 1962. The municipality was first known as Levanger landsogn and then in 1911 the name was changed to Frol. The municipality included all the area surrounding the town of Levanger in what is now the municipality of Levanger in Trøndelag county.