Österåker Municipality is a municipality in Stockholm County in east central Sweden. Its seat is located in the town of Åkersberga, with a population of 26,727 (2005).

Vaxholm Municipality is a municipality in Stockholm County in east central Sweden. The municipal slogan is "Vaxholm – the capital of the archipelago", due to its central location in the archipelago. Its seat is located in the city of Vaxholm.