Modalen is a municipality in the Nordhordland district in the central part of Vestland county in Norway. The administrative centre of the municipality is the village of Mo. The other main village in the municipality is Øvre Helland. Most of the residents of Modalen live in the main Modalen valley which extends eastwards from the end of the Romarheimsfjorden. The small population, combined with a large income from hydro-electric power production, has given the municipality the ability to give all its residents free wireless internet access in the municipality. They also were the first Norwegian municipality to buy a computer for all students in the municipality in 1993. The municipality is the 236th largest by area out of the 356 municipalities in Norway. Modalen is the 355th most populous municipality in Norway with a population of 378 (making it the second smallest municipality in Norway after Utsira). The municipality's population density is and its population has increased by 2.2% over the previous 10-year period. The parish of Modalen was separated from the old municipality of Hosanger on 1 January 1910 to become a separate municipality. Initially, the municipality had 821 residents. During the 1960s, there were many municipal mergers across Norway due to the work of the Schei Committee. On 1 January 1964, the middle part of the Eksingedalen valley (population: 151) was transferred from Modalen to the municipality of Vaksdal. Also on that date, the Nipo, Dyrkolbotn, and Eitrdalen farm areas (population: 12), located north of the village of Romarheim, were transferred from Modalen to the neighboring municipality of Lindås. The municipality (originally the parish) is named after the old Mo farm (Mór) since the first Mo Church was built there in the Middle Ages. The first element is mór which means "heath" or "moor". The last element, dalen, was added later and it is derived from the old word dalr which means "valley" or "dale". The coat of arms was granted on 2 November 1984.