Population of the 31 cities and towns surrounding Boston is 1,069,144.

Boston is the second largest metropolitan area in the US behind New York. Between 1900 and 1930, Boston’s population grew by 33% while the population of those 12 communities grows by 86.8%. Between 1920 and 1930, Boston’s population grew by just 4%, while that of the 12 towns adjacent to Boston grew from 503,676 to 615,555 or 18.2%