Ersmark is a locality in Umeå Municipality, in Västerbotten County, Sweden. Ersmark lies at 44 m above sea level. It has 1,559 inhabitants (2023). The nearest city is Umeå, 6.9 km to the southwest. Among the landmarks around are Umeå City Church (7.1 km), Västerbottens Museum (6.3 km) and Bildmuseet (7.3 km). Among the natural features are Norrforsen (14.2 km).