Sipoo (Finnish pronunciation: [ˈsipoː]; Swedish: Sibbo) is a municipality of Finland. It is part of the Helsinki metropolitan area. The municipality has a population of 21,913
(31 March 2021) and covers an area of 698.60 square kilometres (269.73 sq mi) of
which 358.97 kmÂ² (138.60 sq mi)
is water. The population density is
64.52 inhabitants per square kilometre (167.1/sq mi). The administrative center of the municipality is Nikkilä (Swedish: Nickby), which is located 34 kilometres (21 mi) northeast of the center of Helsinki. Another significant urban area is Söderkulla, located in the southern part of the municipality.