Bad Münstereifel is a historical spa town in the district of Euskirchen, Germany, with about 19,000 inhabitants, situated in the far south of the German state of North Rhine-Westphalia. The little town is one of only few historical towns in the very south of North Rhine-Westphalia, and because of this is often overcrowded by tourists throughout Spring and Summer. As of 2013 the folk-singer Heino has lived in the town. Several German artists, Hans Peter Salentin, writers, and intellectuals, active and retired, live in Bad Münstereifel.
Friedrich Joseph Haass, the "holy doctor of Moscow", was born in Bad Münstereifel in the 19th century. The unofficial Nintendo fan convention, NCON, was held in the town's St. Angela Gymnasium in the early years of the 21st century The Portuguese Socialist Party was founded here[citation.