page_title: Greater St. Louis
section_title: Transportation
hierarchical_section_title: Greater St. Louis / Transportation
context_page_description: Greater St. Louis is a bi-state metropolitan area that completely surrounds and includes the independent city of St. Louis, the principal city. It includes parts of both the U.S. states of Missouri and Illinois. The city core is on the Mississippi Riverfront on the border with Illinois in the geographic center of the metro area. The Mississippi River bisects the metro area geographically between Illinois and Missouri; however, the Missouri half is much more populous. St. Louis is the focus of the largest metro area in Missouri and the Illinois portion known as Metro East is the second largest metropolitan area in that state. St. Louis County is independent of the City of St. Louis and their two populations are generally tabulated separately.
  The St. Louis, MO-IL metropolitan statistical area —and the focus of this page—includes the City of St. Louis; the Illinois counties of Bond, Calhoun, Clinton, Jersey, Macoupin, Madison, Monroe, and St. Clair; and the Missouri counties of Franklin, Jefferson, Lincoln, St. Charles, St. Louis, and Warren.
  The larger St. Louis–St.
context_section_description: Transportation in Greater St. Louis includes road, rail, and air transportation modes connecting the communities in the area with national and international transportation networks. Parts of Greater St. Louis also support a public transportation network that includes bus, as well as the MetroLink light rail which began operating in 1993. The principal airport serving the region is St. Louis Lambert International Airport, located in St. Louis County.
caption: Brookings Hall, the administrative building for Washington University in St. Louis
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