Boston (pronounced /?b?st?n/ (help·info)) is the capital and largest city in Massachusetts, and is one of the oldest cities in the United States. The largest city in New England, Boston is sometimes regarded as the unofficial "Capital of New England" for its economic and cultural impact. Boston city proper had a 2008 estimated population of 620,535, making it the twenty-first largest in the country. Boston is also the anchor of a substantially larger metropolitan area called Greater Boston, home to 4.5 million people and the tenth-largest metropolitan area in the country. Greater Boston as a commuting region includes six Massachusetts counties, Essex, Middlesex, Norfolk, Suffolk, Plymouth, and Worcester, all of Rhode Island and parts of New Hampshire; it is home to 7.5 million people, making it the fifth-largest Combined Statistical Area in the United States.