Mariental Rural is a constituency in the Hardap region of Namibia. It has a population of 13,596, its administrative centre is the city of Mariental.
The 2015 regional elections were won by Simon Christy Dukeleni of Swapo with 1,207 votes. Runner-up and only challenger was Anna Elizabeth de Kock of the Rally for Democracy and Progress with 276 votes.
Coordinates: 24°38′00″S 17°58′00″E / 24.6333°S 17.9667°E