Illinois is a state in the Midwestern United States. It shares borders with Wisconsin to its north, Iowa to its northwest, Missouri to its southwest, Kentucky to its south, and Indiana to its east. Its largest metropolitan areas include the Chicago metropolitan area, and the Metro East section, of Greater St. Louis. Other metropolitan areas include Peoria and Rockford, as well as Springfield, its capital. Of the fifty U.S. states, Illinois has the fifth-largest gross domestic product (GDP), the sixth-largest population, and the 25th-largest land area.
The Mississippi River is the second-longest river and chief river of the second-largest drainage system in North America, second only to the Hudson Bay drainage system. From its traditional source of Lake Itasca in northern Minnesota, it flows generally south for 2,340 miles (3,770 km) to the Mississippi River Delta in the Gulf of Mexico. With its many tributaries, the Mississippi's watershed drains all or parts of 32 U.S. states and two Canadian provinces between the Rocky and Appalachian mountains. The main stem is entirely within the United States; the total drainage basin is 1,151,000 sq mi (2,980,000 km2), of which only about one percent is in Canada. The Mississippi ranks as the thirteenth-largest river by discharge in the world. The river either borders or passes through the states of Minnesota, Wisconsin, Iowa, Illinois, Missouri, Kentucky, Tennessee, Arkansas, Mississippi, and Louisiana.
The Ohio River is a 981-mile (1,579 km) long river in the United States. It is located at the boundary of the Midwestern and Southern United States, flowing in a southwesterly direction from western Pennsylvania to its mouth on the Mississippi River at the southern tip of Illinois. It is the third largest river by discharge volume in the United States and the largest tributary by volume of the north-south flowing Mississippi River that divides the eastern from western United States. It is also the 6th oldest river on the North American continent. The river flows through or along the border of six states, and its drainage basin includes parts of 14 states. Through its largest tributary, the Tennessee River, the basin includes several states of the southeastern U.S. It is the source of drinking water for five million people.
The Chicago River is a system of rivers and canals with a combined length of 156 miles (251 km) that runs through the city of Chicago, including its center. Though not especially long, the river is notable because it is one of the reasons for Chicago's geographic importance: the related Chicago Portage is a link between the Great Lakes and the Mississippi River Basin, and ultimately the Gulf of Mexico.
Monroe County is a county located in the U.S. state of Illinois. According to the 2020 census, it had a population of 34,962. Its county seat and largest city is Waterloo.
Calhoun County is a county in the U.S. state of Illinois. As of the 2010 census, the population was 5,089, making it Illinois’ third-least populous county. Its county seat and biggest community is Hardin, with a population of 801. Its smallest incorporated community is Hamburg, with a population of 99. Calhoun County is at the tip of the peninsula formed by the courses of the Mississippi and Illinois rivers above their confluence and is almost completely surrounded by water. Calhoun County is sparsely populated; it has just five municipalities, all of them villages.
Des Plaines is a city in Cook County, Illinois, United States. Per the 2020 census, the population was 60,675. The city is a suburb of Chicago and is located just north of O'Hare International Airport. It is situated on and is named after the Des Plaines River, which runs through the city just east of its downtown area.
Alton is a city on the Mississippi River in Madison County, Illinois, United States, about 18 miles (29 km) north of St. Louis, Missouri. The population was 25,676 at the 2020 census. It is a part of the River Bend area in the Metro-East region of the Greater St. Louis metropolitan area. It is famous for its limestone bluffs along the river north of the city, as the former location of the state penitentiary, and for its role preceding and during the American Civil War. It was the site of the last Abraham Lincoln and Stephen Douglas debate in October 1858. The former state penitentiary in Alton was used during the Civil War to hold up to 12,000 Confederate prisoners of war.
The Wabash River is a 503-mile-long (810 km) river that drains most of the state of Indiana in the United States. It flows from the headwaters in Ohio, near the Indiana border, then southwest across northern Indiana turning south near the Illinois border, where the southern portion forms the Indiana-Illinois border before flowing into the Ohio River.
Southern Illinois, also known as Little Egypt, is the southern third of Illinois, principally along and south of Interstate 64. Although part of a Midwestern state, this region is aligned in culture more with that of the Upland South than the Midwest. Part of downstate Illinois, it is bordered by the two most voluminous rivers in the United States: the Mississippi below its connecting Missouri River to the west and the Ohio River to the east and south with the Wabash as tributary.
The Fox River is a river in eastern Wisconsin in the Great Lakes region of the United States. It is the principal tributary of Green Bay, and via the Bay, the largest tributary of Lake Michigan. The well-known city of Green Bay, one of the first European settlements in North America, is on the river at its mouth on lower Green Bay.
The Illinois Country —sometimes referred to as Upper Louisiana —was a vast region of New France claimed in the 1600s in what is now the Midwestern United States. While these names generally referred to the entire Upper Mississippi River watershed, French colonial settlement was concentrated along the Mississippi and Illinois Rivers in what is now the U.S. states of Illinois and Missouri, with outposts in Indiana. Explored in 1673 from Green Bay to the Arkansas River by the Canadien expedition of Louis Jolliet and Jacques Marquette, the area was claimed by France. It was settled primarily from the Pays d'en Haut in the context of the fur trade, and in the establishment of missions by French Catholic religious orders. Over time, the fur trade took some French to the far reaches of the Rocky Mountains, especially along the branches of the broad Missouri River valley. The French name, Pays des Ilinois, means "Land of the Illinois [plural]" and is a reference to the Illinois Confederation, a group of related Algonquian native peoples.
The Rock River is a tributary of the Mississippi River, approximately 299 miles (481 km) long, in the U.S. states of Wisconsin and Illinois. The river was known as the Sinnissippi to Sauk and Fox Indians; the name means "rocky waters".
The Illinois River is a 145-mile-long (233 km) tributary of the Arkansas River in the U.S. states of Arkansas and Oklahoma. The Osage Indians named it Ne-eng-wah-kon-dah, which translates as "Medicine Stone River." The state of Oklahoma has designated its portion as a Scenic River. The Illinois River is a significant location in the 1961 Wilson Rawls novel, Where the Red Fern Grows.
The Meskwaki, also known by the European exonyms Fox Indians or the Fox, are a Native American people. They have been closely linked to the Sauk people of the same language family. In the Meskwaki language, the Meskwaki call themselves Meshkwahkihaki, which means "the Red-Earths", related to their creation story. Historically their homelands were in the Great Lakes region. The tribe coalesced in the St. Lawrence River Valley in present-day Ontario, Canada. Under French colonial pressures, it migrated to the southern side of the Great Lakes to territory that much later was organized by European Americans as the states of Michigan, Wisconsin, Illinois, and Iowa.
The Illinois and Midland Railroad is a railroad in the U.S. state of Illinois, serving Peoria, Springfield and Taylorville. Until 1996, when Genesee & Wyoming Inc. bought it, the company was named the Chicago and Illinois Midland Railway. It was once a Class I railroad, specializing in the hauling of coal. At the end of 1970 it operated 121 route-miles on 214 miles of track; it reported 255 million ton-miles of revenue freight that year.
The Wabash Valley is a region located in sections of both Illinois and Indiana. It is named for the Wabash River and, as the name is typically used, spans the middle to the middle-lower portion of the river's valley and is centered at Terre Haute, Indiana. The term Wabash Valley is frequently used in local media in Clinton, Lafayette, Mount Carmel, Princeton, Terre Haute, and Vincennes all of which are either on or near the Lower Wabash River.
Cave-In-Rock State Park is an Illinois state park, on 204 acres (0.83 km2), in the town of Cave-in-Rock, Hardin County, Illinois in the United States. The state park contains the historic Cave-In-Rock, a landmark of the Ohio River. It is maintained by the Illinois Department of Natural Resources (IDNR).
Jim Weaver McKown Barnes, of Choctaw and Welsh descent, was born near Summerfield, Oklahoma. He received his BA from Southeastern State University and his MA and Ph.D. from the University of Arkansas. He taught at Truman State University from 1970 to 2003, where he was Professor of Comparative Literature and Writer-in-Residence. After retiring from Truman State, he was Distinguished Professor of English and Creative Writing at Brigham Young University until 2006. On January 15, 2009, Barnes was named Oklahoma Poet Laureate for 2009–2010.
The following outline is provided as an overview of and topical guide to the U.S. state of Illinois:
