Namdalseid is a village in Namsos Municipality in Trøndelag county, Norway. The village is located along the Norwegian County Road 17, about 30 kilometres north of the town of Steinkjer and about the same distance south of the town of Namsos. The Namdalseid Church sits just southwest of the village. There's a school in the village as well. The 0.3-square-kilometre village has a population of 331 and a population density of 1,103 inhabitants per square kilometre.