Nord-Trøndelag is a county constituting the northern part of Trøndelag in Norway. As of 2010, the county had 131,555 inhabitants, making it the country's fourth-least populated county. The largest municipalities are Stjørdal, Steinkjer—the county seat, Levanger, Namsos and Verdal, all with between 21,000 and 12,000 inhabitants. The economy is primarily centred around services, although there are significant industries in agriculture, fisheries, hydroelectricity and forestry. It has the lowest gross domestic product per capita of any county in the country.