In hog and pig farming in the U.S., the animals are allowed to roam freely, raised in a homestead or bred within intensive commercial units in an industrial farm system. The number of hogs and pigs kept for breeding in the U.S. amounted to about 6 million in 2015 and over a 100 million hogs are slaughtered annually in the United States. In 2014, the total production value of hogs and pigs in the U.S. amounted to about 24.2 billion U.S. dollars and their value per head stood at around 144 U.S. dollars as of 2014. The state of Iowa is by far the leading producer of hogs in the United States with North Carolina coming a distant second. Hog and pig parts are typically prepared into food specialties such as ham, sausage, bacon, gammon meat or trotters.
Concentrated animal feeding operations (CAFO) in the U.S., using hogs and pigs, has continued to generate a lot of concerns public health and waste management concerns as well as elicit very strong criticisms from animal welfare activists. Over 20 billion pounds of pork is produced annually in the United States.