The Cincinnati metropolitan area (also known as the Cincinnati Tri-State area, or Greater Cincinnati) is a metropolitan area centered on Cincinnati and including surrounding counties in the U.S. states of Ohio, Kentucky, and Indiana. The area is commonly known as Greater Cincinnati. The United States Census Bureau's formal name for the area is the Cincinnati, OH–KY–IN Metropolitan Statistical Area. As of the 2010 U.S. Census, this MSA had a population of 2,114,580, making Greater Cincinnati the 29th most populous metropolitan area in the United States, the largest metro area primarily in Ohio, followed by Columbus (2nd) and Cleveland (3rd). The Census also lists the Cincinnati–Wilmington–Maysville, OH–KY–IN Combined Statistical Area, which adds Clinton County, Ohio (defined as the Wilmington, OH micropolitan area) and Mason County, Kentucky (defined as the Maysville, KY micropolitan area) for a 2014 estimated population of 2,208,450. The Cincinnati metropolitan area is considered part of the Great Lakes Megalopolis.
