Toledo (/təˈliːdoʊ/) is a city in and the county seat of Lucas County, Ohio, United States. A major Midwestern United States port city, Toledo is the fourth-most-populous city in the U.S. state of Ohio, after Columbus, Cleveland, and Cincinnati, and according to the 2010 census, the 71st-largest city in the United States. With a population of 274,975, it is the principal city of the Toledo metropolitan area. It also serves as a major trade center for the Midwest; its port is the fifth busiest in the Great Lakes and 54th biggest in the United States. The city was founded in 1833 on the west bank of the Maumee River, and originally incorporated as part of Monroe County, Michigan Territory. It was re-founded in 1837, after the conclusion of the Toledo War, when it was incorporated in Ohio.

After the 1845 completion of the Miami and Erie Canal, Toledo grew quickly; it also benefited from its position on the railway line between New York City and Chicago.