It is easy to assume that GUINNESS is distributed in Ireland the most, but this is not the case. The largest market for GUINNESS is in Great Britain. The second largest is in Nigeria, where 40% of all Guinness is consumed. There are five Guinness-owned breweries in the world and three of them are in African nations. Ireland comes third in the list, Cameroon fourth and the U.S. is in fifth place for distribution.
As mentioned earlier, distribution is part of a three-tier system that many kinds of beers go through. Suppliers, like national breweries or importers, sell the product to wholesalers or distributors, who then sell the beer to retailers, like the pubs and supermarkets. It is a mandate in most places that beer go through this system.