Achaia Clauss is a Greek winery located in Patras in the Peloponnese. It was founded in 1861 by the Bavarian Gustav Clauss. It is most famous for its fortified red wine, Mavrodaphne. The winery was the main sponsor of the local basketball team, Apollon Achaia Clauss.

The Achaia Clauss winery has many storage areas with a total capacity of about 7500 tonnes. The main ones are the storage of old Mavrodaphne wine, the storage of table wines, the subterranean tanks, and the Danielis storage room.