Luxembourgers are an ethnic group native to Luxembourg sharing the culture of Luxembourg and being of Luxembourgian descent.

Most ethnic Luxembourgers live in the Grand-Duchy of Luxembourg, a small country located in Europe between Germany, France and Belgium and are a mixture of Celtic and Germanic origin. Most speak Luxembourgish, as their native language, in addition to French and German. Luxembourgish is a German dialect. However, there is a relatively large diaspora, in Europe and elsewhere. Particularly, there are populations in the surrounding countries of Belgium, France, and Germany. For the most part, this is due to historic reasons, especially the three Partitions of Luxembourg, which led to former territories of Luxembourg being incorporated into each of the three surrounding countries.

There are also significant populations in the Americas, with the largest contingent being in the United States. However, many people of Luxembourgish descent live in Argentina and Brazil, to which large waves of Luxembourgers emigrated in the nineteenth century, as did Germans at the same time. Others migrated to Hungary along with Germans during the first phase of German eastward settlement in the 12th century. Transylvanian Saxons are the descendents of these settlers.