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 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

• Soviet Geography
• Soviet Georgian admirals
• Soviet German
• Soviet Germans
• Soviet-German Syphilis Expedition
• Soviet grain crisis of 1928
• Soviet grain procurement crisis of 1928
• Soviet Heavy Draught
• Soviet History
• Soviet history (1964-1982)
• Soviet Hungary
• Soviet Hydrographic Service
• Soviet icebreaker Kapitan Belousov
• Soviet Indoor Athletics Championships
• Soviet industrialisation
• Soviet integrated circuit designation
• Soviet Internal Troops
• Soviet intervention in Mongolia
• Soviet intervention of Mongolia
• Soviet invasion of Armenia
• Soviet invasion of Azerbaijan
• Soviet invasion of Germany
• Soviet invasion of the Baltic states (1940)
• Soviet involvement in the Iran-Iraq War
• Sovietise