What section of the pig does ham come from?
Ham is the section of a hog's hind leg that extends from the knee to the hip. It may be either "long or short cut." A long-cut ham includes all the hog's hip and a long section of the shank (part of the hog's leg above the knee).
The more common, short-cut ham includes a part of the hip and a small section of the shank.
A 4-ounce piece of boneless ham has about three-fourths of an ounce of protein and 461 calories. It contains such vitamins as thiamine, riboflavin and niacin.
Source: The World Book Encyclopedia