Ekerö is a locality and the seat of Ekerö Municipality in Stockholm County, Sweden, with 10,907 inhabitants in 2010.Agnetha Fältskog of ABBA fame lives on the island (2011).Anders Bagge (songwriter) lives also on the island (2011), and Lykke Li (singer-songwriter).Färingsö is the largest of the islands forming Ekerö Municipality. Ekerö consists of the formerly separate islets of Ekerö, Munsö and Kärsö.