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St. Louis County, the largest county in Missouri, covers an area of 524 square miles and had a 2000 Census population of 1,016,300. The County is an integral part of the St. Louis Metropolitan Statistical Area (MSA), which was redefined in June 2003 to consist of eight counties in Missouri and eight counties in Illinois. St. Louis County’s population in the year 2000 comprised 36 percent of the redefined bi-state metropolitan area’s population of 2,778,518.
 
Introduction