St. Louis is a city and port in the U.S. state of Missouri. The city developed along the western bank of the Mississippi River, which forms Missouri's border with Illinois. In 2010, St. Louis had a population of 319,294; a 2013 estimate put the population at 318,416, making it the 58th-most populous U.S. city in 2013 and the second-largest city in the state. The St. Louis metropolitan area includes the city as well as nearby areas in Missouri and Illinois; it is among the largest metropolitan areas in the United States, with a population of 2,905,893.
St. Louis ) is an independent city and a major United States port on the eastern line of the state of Missouri. As of the 2010 census, the population was 319,294, and a 2012 estimate put the population at 318,172, making it the 58th-largest U.S. city in 2012. The metropolitan St. Louis area, known as Greater St. Louis (CSA), is the 19th-largest metropolitan area in the United States with a population of 2,900,605.