Kaysersberg (German: Kaisersberg ) is a former commune in the Haut-Rhin department in Alsace in Northeastern France. On 1 January 2016, it was merged into the new commune Kaysersberg-Vignoble.
The inhabitants are called Kaysersbergeois. The name is German for Emperor's Mountain.
The high fortress that dominates the city serves as a reminder of both its strategic importance and its warlike past. Together with the rest of Alsace-Lorraine, Kaysersberg was annexed by Germany during a period of 48 years, between the Franco-Prussian War and the First World War.
Kaysersberg is one of the finest wine-growing areas in Alsace. The first vines were brought there in the 16th century from Hungary, and wine production is still an important aspect of the town's economy today. Wine produced from the pinot gris variety is a local specialty.