Welcome to the internet home of the largest manufacturer of all natural Swiss cheese in the United States. Brewster Dairy has experienced steady growth in the Swiss cheese market since the dairy was purchased by John Leeman in 1965. Over the years we have expanded our production and warehousing facilities in Brewster, Ohio and added production facilities in Stockton, Illinois and Rupert, Idaho. We currently produce approximately 85 million pounds of Award Winning, All Natural Swiss cheese annually.