The metropolitan area surrounding and including Detroit, Michigan, is a ten-county area with a population of over 5.9 million, a workforce of 2.6 million, and about 347,000 businesses.Detroit's six-county Metropolitan Statistical Area has a population of about 4.3 million, a workforce of about 2.1 million, and a gross metropolitan product of $200.9 billion. Detroit's urban area has a population of 3.9 million. A 2005 PricewaterhouseCoopers study estimated that Detroit's urban area had a gross domestic product of $203 billion.