Greater St. Louis is the informal name of the St. Louis Metropolitan Statistical Area, the largest in the state of Missouri, and the 18th largest in the United States. Its population of 2,796,368 (as of 2006 according to the US Census Bureau) includes the independent City of St. Louis, St. Louis County (which does not include the City of St. Louis), the Missouri counties of Saint Charles, Jefferson, Franklin, Lincoln Warren,and Washington, and the Illinois counties of Madison, Saint Clair, Clinton, Monroe and Jersey. St. Louis apartments for rent comparison page shows most up to date rent information on St. Louis apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.