It is Ohio's third largest metropolitan area, behind Cleveland and Cincinnati. Census Bureau, the Columbus-Marion-Zanesville, OH Combined Statistical Area (which also includes Marion, Chillicothe, and Mount Vernon) has a population of 2,424,831, making it the second largest metropolitan area in Ohio behind Cleveland.
Under the Combined Statistical Area (CSA) model, the Columbus, OH Metropolitan Statistical Area was the 25th largest in the United States. The city proper has also expanded and annexed portions of adjoining Delaware County and Fairfield County.
In the early 1750s the Ohio Company sent George Washington to the Ohio Country to survey.
In 2012, Columbus was ranked in Business Week under the nominal control of the French colonial empire through the Viceroyalty of New France from 1663 until 1763.In the 18th century European traders flocked to the area, attracted by the fur trade.During this period the region routinely suffered turmoil, massacres and battles.The 1763 Treaty of Paris ceded the Ohio Country to the British Empire.The area found itself frequently caught between warring factions, including American Indian and European interests.
In the 1740s, Pennsylvania traders overran the territory until the French forcibly evicted them.