Nierstein-Oppenheim
Nierstein-Oppenheim is a former Verbandsgemeinde ("collective municipality") in the district Mainz-Bingen (Rheinhessen) in Rhineland-Palatinate, Germany. It is situated on the left bank of the Rhine, approx. 15 km south-east of Mainz. On 1 July 2014 it merged into the new Verbandsgemeinde Rhein-Selz.
The Verbandsgemeinde consisted of the following eleven Ortsgemeinden ("local municipalities"):
- Dalheim
 - Dexheim
 - Dienheim
 - Friesenheim
 - Hahnheim
 - Köngernheim
 - Mommenheim
 - Nierstein
 - Oppenheim
 - Selzen
 - Undenheim
 
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49°51′N 8°22′E / 49.850°N 8.367°E