Dalarö is a locality situated in Haninge Municipality, Stockholm County, Sweden with 1,199 inhabitants in 2010.It is situated south-east of Stockholm and is part of Metropolitan Stockholm and serves as a recreational summer spot for Stockholmers. At the beginning of the year 2004, the automobile company Volvo used the town for the unconventional The Mystery of Dalarö advertising campaign.Dalarö is Haninge Municipality's oldest locality, originally an old maritime pilot and customs community.