The
United States Office of Management and Budget has defined the
Denver-Aurora, CO Combined Statistical Area comprising the
Denver-Aurora-Lakewood, CO Metropolitan Statistical Area, the
Boulder, CO Metropolitan Statistical Area, and the
Greeley, CO Metropolitan Statistical Area. The
United States Census Bureau estimates that the population was 3,214,218 as of July 1, 2012, an increase of +3.99% since the
2010 United States Census, and ranking as the
16th most populous metropolitan
combined statistical area and the
17th most populous primary statistical area of the United States.