The two main rivers of the district are the Rhine and the Moselle, which join at the Deutsches Eck in Koblenz. In the west of the district are the Eifel mountains. These also include the large lake, the Laacher See, a volcanic caldera formed 12000 years ago.
The coat of arms combine the elements of the two precursor districts. The tree, a Maie, is taken from the Mayen district. The wavy line represents the two rivers Rhine and Moselle. The crown is a reference to the fact that in Rhens the Councils of Electors took place to choose the emperors and kings of the Holy Roman Empire.