Untermosel is a former Verbandsgemeinde ("collective municipality") in the district Mayen-Koblenz, in Rhineland-Palatinate, Germany. It is situated along the lower course of the river Mosel, south-west of Koblenz. The seat of the municipality was in Kobern-Gondorf. On 1 July 2014 it merged into the new Verbandsgemeinde Rhein-Mosel.

The Verbandsgemeinde Untermosel consisted of the following Ortsgemeinden ("local municipalities"):

  1. Alken
  2. Brodenbach
  3. Burgen
  4. Dieblich
  5. Hatzenport
  6. Kobern-Gondorf
  7. Lehmen
  8. Löf
  9. Macken
  10. Niederfell
  11. Nörtershausen
  12. Oberfell
  13. Winningen
  14. Wolken

50°18′17″N 7°27′26″E / 50.30472°N 7.45722°E / 50.30472; 7.45722