Jonathan Ogden Armour was an American meatpacking magnate and only surviving son of Civil War–era industrialist Philip Danforth Armour. He became owner and president of Armour & Company upon the death of his father in 1901. During his tenure as president, Armour and Co. expanded nationwide and overseas, growing from a mid-sized regional meatpacker to the largest food products company in the United States.

Philip Danforth Armour Sr. was an American meatpacking industrialist who founded the Chicago-based firm of Armour & Company. Born on a farm in upstate New York, he initially gained financial success when he made $8,000 during the California gold rush from 1852 to 1856. He later opened a wholesale soap business in Cincinnati, then moved it to Milwaukee.