Holmsund is a locality situated in Umeå Municipality, Västerbotten County, Sweden with 5,489 inhabitants in 2010. It is located 18 km south of the city of Umeå and serves as a port for Umeå. Holmsund lies at the mouth of the Ume River. To the west, across the river estuary, is a town called Obbola. Both Holmsund and Obbola have wood and paper industries. From the southern end of Holmsund a ferry service runs to the Finnish port of Vaasa.