The state that banned Margarine for 72 years to protect their dairy farmers is Wisconsin, located in the United States. In 1895, Wisconsin passed a law that made the sale of colored margarine illegal, as it was made to look like butter and was seen as a direct competition to the state's dairy industry. The law also required that all white margarine should be sold in a separate package with a warning label indicating that it was not butter. This ban on margarine continued until 1967 when it was eventually lifted. Wisconsin remains a major producer of dairy products and is home to the famous dairy brand, "Wisconsin Cheese".