Sipoo (Sibbo in Swedish) is a municipality of Finland. Its seat is in Nikkilä.
It is the eastern neighbor of Helsinki and is located in the province of Southern Finland and is part of the Eastern Uusimaa region. The municipality has a population of 18,444 (2004-12-31) and covers an area of 366.75 km² of which 2.65 km² is water. The population density is 50.66 inhabitants per km².
The municipality is bilingual, with majority being Finnish and minority Swedish speakers.
Alfred