St. Louis County, Missouri in the context of "St. Louis"

Greater St. Louis is the 23rd-largest metropolitan statistical area (MSA) in the United States consisting with an MSA population more than 2.8 million, and almost 3 million CSA the largest in Missouri, and the second-largest in Illinois. Its core city—St. Louis, Missouri—sits in the geographic center of the metro area, on the west bank of the Mississippi River. The river bisects the metro area geographically between Illinois and Missouri, although the latter portion is much more populous. The MSA includes St. Louis County, which is independent of the City of St. Louis; their two populations are generally tabulated separately.

The St. Louis, MO-IL metropolitan statistical area (MSA) includes the City of St. Louis; the Illinois counties of Bond, Calhoun, Clinton, Jersey, Macoupin, Madison, Monroe, and St. Clair (known collectively as the Metro East); and the Missouri counties of Crawford (only the City of Sullivan), Franklin, Jefferson, Lincoln, St. Charles, St. Louis (separate from and not inclusive of the city of St. Louis), and Warren.

Francis Olympic Field is a stadium at Washington University in St. Louis that was used as the main venue for the 1904 Summer Olympics. It is currently used by the university's track and field, cross country, football, and soccer teams. It is located in St. Louis County, Missouri on the far western edge of the university's Danforth Campus. Built in time for the Louisiana Purchase Exposition (1904 St. Louis World's Fair), the stadium once had a 19,000-person seating capacity, but stadium renovations in 1984 reduced the capacity to 3,300 people. It is one of the oldest sports venues west of the Mississippi River that is still in use. Francis Olympic Field now uses artificial turf that can be configured for both soccer and football.

Known at its opening as World's Fair Stadium and then as Washington University Stadium or simply "the Stadium", the venue was renamed as Francis Field in October 1907 for David R. Francis, a former Missouri governor and president of the Louisiana Purchase Exposition. The word "Olympic" was added in 2019 to reflect its role in the 1904 Summer Olympics.

There are 114 counties and one independent city in the U.S. State of Missouri. Following the Louisiana Purchase and the admittance of Louisiana into the United States in 1812, five counties were formed out of the Missouri Territory at the first general assembly: Cape Girardeau, New Madrid, Saint Charles, Saint Louis, and Ste. Genevieve. Most subsequent counties were apportioned from these five original counties. Six more counties were added through the 1836 Platte Purchase, the acquired lands of which formed the northwest tip of the state and consisted of Andrew, Atchison, Buchanan, Holt, Nodaway, and Platte counties.

In Missouri, the county level of government comes between those of the city and the state. Its primary responsibilities include maintaining roads, providing security, prosecuting criminals, and collecting taxes. Elected officials at this level include a sheriff, prosecuting attorney, and assessor.

The Meramec River (/ˈmɛrɪmæk/), sometimes spelled Maramec River (the original US mapping spelled it Maramec but later changed it to Meramec), is one of the longest free-flowing waterways in the U.S. state of Missouri, draining 3,980 square miles (10,300 km) while wandering 218 miles (351 km) from headwaters southeast of Salem to where it empties into the Mississippi River near St. Louis at Arnold and Oakville. The Meramec watershed coverssix Missouri Ozark Highland counties—Dent, Phelps, Crawford, Franklin, Jefferson, and St. Louis—and portions of eight others—Maries, Gasconade, Iron, Washington, Reynolds, St. Francois, Ste. Genevieve, and Texas. Between its source and its mouth, it falls 1,025 feet (312 m). Year-round navigability begins above Maramec Spring, just south of St. James. The Meramec's size increases at the confluence of the Dry Fork, and its navigability continues until the river enters the Mississippi at Arnold, Missouri.

Clayton is a city in and the county seat of St. Louis County, Missouri, and borders the independent city of St. Louis. The population was 17,355 at the 2020 census. Organized in 1877, the city was named after Ralph Clayton, a citizen who donated the land for the St. Louis County courthouse.

Jackson County is located in the western portion of the U.S. state of Missouri, on the border with Kansas. As of the 2020 census, the population was 717,204. making it the second-most populous county in the state (after St. Louis County in the east). The county seats are Independence and Kansas City, making Jackson County one of 33 U.S. counties with more than one county seat. The county was organized December 15, 1826, and named for former Tennessee senator Andrew Jackson, who would become President of the United States three years later in 1829.