Greek feta cheese (Greek: φέτα) is a brined curd cheese traditionally made in Greece. Since 2002, feta has been a protected designation of origin product. According to the relevant EU legislation, only those cheeses produced in a traditional way in some areas of Greece (mainland and the island of Lesbos), and made from sheep milk, or from a mixture of sheep and goats’ milk (up to 30%) of the same area, may bear the name "feta".

Greek feta cheese is an aged crumbly cheese, commonly produced in blocks, and has a slightly grainy texture. It is used as a table cheese, as well as in salads (e.g. the Greek salad), pastries and in baking, notably in the popular phyllo-based dishes spanakopita ("spinach pie") and tyropita ("cheese pie") and combined with olive oil and vegetables. It can also be served cooked or grilled, as part of a sandwich or as a salty alternative to other cheeses in a variety of dishes.