Columbus is the state capital and the most populous city in the U.S. state of Ohio. With a population of 892,533 as of 2018 estimates, it is the 14th-most populous city in the United States and one of the fastest growing large cities in the nation. Columbus is the second-most populous city in the Midwest, after Chicago, Illinois. It is the core city of the Columbus, OH Metropolitan Statistical Area, which encompasses ten counties. With a population of 2,106,541, it is Ohio's second-largest metropolitan area.