Ernst Loosen is a German winemaker and owner of the wine producer Weingut Dr. Loosen, located just outside Bernkastel in the Mosel wine region. With over 130,000 annual bottle production, he is one of the larger producers in the Mosel region. He is particularly known for the quality of his Rieslings, having won "Riesling of the Year" in 1989 as awarded by the German wine trade magazine Feinschmecker.