Boston  is the capital and largest city of the Commonwealth of Massachusetts in the United States. Boston is also the seat of Suffolk County, although the county government was disbanded on July 1, 1999.

 The city proper covers 48 square miles (124 km2) with an estimated population of 667,137 in 2015, making it the largest city in New England and the 23rd largest city in the United States.
The city is the economic and cultural anchor of a substantially larger metropolitan area called Greater Boston, home to 4.7 million people and the tenth-largest metropolitan statistical area in the country.
Greater Boston as a commuting region is home to 8.1 million people, making it the sixth-largest combined statistical area in the United States