Ilmtal-Weinstraße is a municipality in the district Weimarer Land, in Thuringia, Germany. It was named after the river Ilm, that flows through the municipality. It was formed on 31 December 2013 by the merger of the former municipalities Liebstedt, Mattstedt, Niederreißen, Niederroßla, Nirmsdorf, Oberreißen, Oßmannstedt, Pfiffelbach and Willerstedt. Before, these municipalities had cooperated in the Verwaltungsgemeinschaft ("collective municipality") Ilmtal-Weinstraße, which was disbanded. The seat of the municipality and of the former Verwaltungsgemeinschaft is in Pfiffelbach. The former municipalities Kromsdorf (which had been part of the former Verwaltungsgemeinschaft Ilmtal-Weinstraße), Rohrbach and Leutenthal were merged into Ilmtal-Weinstraße in January 2019. Area codes: 03644 for Mattstedt, Niederroßla and district Wersdorf of municipality Pfiffelbach 036462 for Liebstedt, Oßmannstedt, Pfiffelbach 036463 for Nirmsdorf, Willerstedt 036373 for Niederreißen and Oberreißen References External links Ilmtal-Weinstraße official site Former Verwaltungsgemeinschaften in Thuringia Weimarer Land Grand Duchy of Saxe-Weimar-Eisenach