Merkers-Kieselbach is a former municipality in the Wartburgkreis district of Thuringia, Germany. Since 31 December 2013, it is part of the municipality Krayenberggemeinde. Merkers-Kieselbach lies on either side of the River Werra near the Thuringian Forest and Rhön hills. It contains the settlements of Merkers, Kieselbach and Kambachsmühle.