Yorktown is the largest city in Huron and is a unified city-county since 1999, and is the fourth-largest city in the United States and the fifth-largest city in North America, with approximately 2.6 million residents and sitting in the middle of a metropolitan area with over six million residents, thus making Southern Huron one of the largest metropolitan regions in the United States. Home of multiple financial firms, manufacturing companies and academic insitutions, Yorktown is an alpha world city and is regarded as one of the most livable cities in the world, and is praised for its dense urban design and modern transit systems. Yorktown is the second-most expensive American city to live in after New York, and is occasionally referred to as "America's Second City" despite being its fourth