Oscar Mayer is an American meat and cold cut production company, owned by the American food company Kraft Heinz based in Chicago, Illinois. It is known for its hot dogs, bologna, bacon, ham, and Lunchables products.

About the brand's history, German immigrant Oscar F. Mayer (1859–1955), born in Kösingen, Germany, began working at a meat market in Detroit, Michigan, and later in Chicago, Illinois. In 1883, Mayer and his brother Gottfried leased the Kolling Meat Market on the near-northside of Chicago. The Mayer brothers sold bratwurst, liverwurst, and weißwurst, which were popular in the predominantly German neighborhoods around their Chicago meat market.

As the meat market's popularity grew, it expanded its storefront and participated in sponsoring local events including the 1893 Chicago World's Fair. By 1900, the company had 43 employees and a Chicago-wide delivery service. In 1904, Oscar Mayer began branding its meats to capitalize on its popularity, beginning an industry-wide trend. Early company specialties were "Old World" sausages and Westphalian hams, soon followed by bacon and wieners.

In 1906, Oscar Mayer & Co. was among the first to volunteer to join the newly created federal meat inspection program. In 1919, the company made its first major expansion, with the purchase of a processing plant in Madison, Wisconsin. The plant quickly proved to be a profitable, efficient operation, and in 1919 Madison became the corporate headquarters.

For nearly a century, Oscar Mayer remained an independent company owned primarily by descendants of the Mayer brothers who started it. In 1981, Oscar Mayer stockholders elected to sell the company to General Foods. Four years later, Philip Morris acquired General Foods, and in 1989 merged General Foods with the newly acquired Kraft Foods transforming it into Kraft General foods.

On November 4, 2015, owner Kraft Heinz announced it would move the Oscar Mayer headquarters and the company's U.S. meats business from Madison to Chicago.

According to Statista, Oscar Mayer was the best-selling bacon brand in the United States, with about 255 million U.S. dollars worth of sales for the 12 weeks ended in June 14, 2020.

According to Statista and en.wikipedia