MIAMI-Miami developers built condos—and buyers came. Now, a new demographic study is revealing who turned up: young working professionals seeking an urban lifestyle.

Indeed, the Miami Downtown Development Authority report finds that the urban core is attracting a younger, more affluent residential base in the wake of a building boom that saw 23,000 new residential units delivered between 2003 and 2010. The area’s population stands at about 72,000. That’s a 9% year-over-year increase from 2010 and outpaces the 6.8% growth rate during the previous decade.

"Downtown has grown into a place where young professionals want to live, work and play," Alyce Robertson, executive director of the Miami Downtown Development Authority, tells GlobeSt.com. "With condo inventory more than 85% absorbed and 200-plus new retail establishments opened in recent years, Miami now has a vibrant 24/7 urban center that is both hip and affordable."