Sipoo (Finnish pronunciation: [ˈsipoː]; Swedish: Sibbo) is a municipality of Finland.

The coat of arms of the municipality refers to the origin story of the settlement, according to which the ancestors of Sipoo are said to have arrived in the region on a viking ship, the bow of which was decorated with a head of wolf; accordingly, locals have even been called the “wolves of Sipoo”.

The once almost completely Swedish-speaking municipality is bilingual since 1953, a majority being Finnish speakers, due to migration from other parts of Finland since 2003.

[4] On June 26, 2006, the Sipoo town council decided on a strategy to triple the municipality's population over the next 25 years.

The decision was made after Helsinki announced plans to annex a part of the municipality in order to continue to build high-end urbanizations by the coastline (and thus high-tax revenue producing).