Sønderborg Municipality, is a municipality in the Region o Soothren Denmark pairtially on the Jutland peninsulae an pairtially on the island o Als in sooth Denmark, at the border wi Germany. The municipality covers an aurie o 496.57 km2 (191.73 sq mi), an haes a total population o 76,236. Its mayor is Aase Nyegaard, a member o the local poleetical pairty Fælleslisten.