Callantsoog (West Frisian: Kallantsouge) ( 52°50′N, 4°42′E) is a town in the Dutch province of North Holland. It is a part of the municipality of Zijpe, and lies about 13 km south of Den Helder. Until 1990, Callantsoog was a municipality; its area is now part of the municipalities of Zijpe, Den Helder, and Anna Paulowna. Callantsoog has the oldest official nude beach of the country, dating from 1973. It is a sandy beach 1.5 km to the south. Callantsoog was a separate municipality until 1990, when it was merged with Zijpe. In 2001, the town of Callantsoog had 1956 inhabitants. The built-up area of the town was 0.58 km², and contained 899 residences.The wider statistical area "Callantsoog" has a population of around 2580.This includes also the village of Groote Keeten and the hamlet of Abbestede north of Callantsoog itself.