"Commonwealth" is a nomenclature used by four of the constituent states of the United States of America in their official, full state names. These states are Kentucky, Massachusetts, Pennsylvania, and Virginia. The four were among the first 15 states to join the Union.

"Commonwealth" is a nomenclature used by four of the constituent states of the United States of America in their official, full state names. These states are Kentucky, Massachusetts, Pennsylvania, and Virginia. The four were among the first 15 states to join the Union.