Springfield is the capital city of the U.S. state of Illinois and the county seat of Sangamon County. The city's population was 114,394 at the 2020 census, which makes it the state's seventh most-populous city, the second largest outside of the Chicago metropolitan area, and the largest in central Illinois. Approximately 208,000 residents live in the Springfield metropolitan area.

Interstate 72 (I-72) is an Interstate Highway in the midwestern United States. Its western terminus is in Hannibal, Missouri, at an intersection with U.S. Route 61 (US 61); its eastern terminus is at Country Fair Drive in Champaign, Illinois. The route runs through the major cities of Decatur, Illinois, and Springfield, Illinois. In 2006, the Illinois General Assembly dedicated all of I-72 as Purple Heart Memorial Highway. The stretch between Springfield and Decatur is also called Penny Severns Memorial Expressway, and the section between mile 35 and the Mississippi River is known as the Free Frank McWorter Historic Highway.

WICD is a television station licensed to Champaign, Illinois, United States, affiliated with ABC. Owned by Sinclair Broadcast Group, the station has studios on South Country Fair Drive in downtown Champaign, and its transmitter is located northeast of Homer, along the Vermilion–Champaign county line.

The Illinois Central Railroad, sometimes called the Main Line of Mid-America, was a railroad in the Central United States, with its primary routes connecting Chicago, Illinois, with New Orleans, Louisiana, and Mobile, Alabama, and thus, the Great Lakes to the Gulf of Mexico. A line also connected Chicago west to Sioux City, Iowa (1870). There was a significant branch to Omaha, Nebraska (1899), west of Fort Dodge, Iowa, and another branch reaching Sioux Falls, South Dakota (1877), starting from Cherokee, Iowa. The IC also serviced Miami, Florida, on trackage owned by other railroads

The Diocese of Springfield in Illinois is a Latin Church ecclesiastical territory, or diocese, of the Catholic Church in south central Illinois in the United States. The mother church is the Cathedral of the Immaculate Conception in Springfield

The Illini and Saluki are a pair of passenger trains operated by Amtrak along a 310-mile (500 km) route between Chicago and Carbondale, Illinois. They are part of Amtrak's Illinois Service and are primarily funded by the state of Illinois. The route is coextensive with the far northern leg of the long-distance City of New Orleans. The Illini has operated since 1973; a previous version operated in 1971–1972 between Chicago and Champaign. The Saluki debuted in 2006.

The Chicago Central and Pacific Railroad is part of the Illinois Central Railroad (IC), which is owned by the Canadian National Railway (CN) through the Grand Trunk Corporation. Operationally, the Chicago Central & Pacific is designated as the Iowa Zone of CN's Southern Region.

Central Station was an intercity passenger terminal in downtown Chicago, Illinois, at the southern end of Grant Park near Roosevelt Road and Michigan Avenue. Owned by the Illinois Central Railroad, it also served other companies via trackage rights. It opened in 1893, replacing Great Central Station, and closed in 1972 when Amtrak rerouted services to Union Station. The station building was demolished in 1974. It is now the site of a redevelopment called Central Station, Chicago.

The Illinois Terminal Railroad Company, known as the Illinois Traction System until 1937, was a heavy duty interurban electric railroad with extensive passenger and freight business in central and southern Illinois from 1896 to 1956. When Depression era Illinois Traction was in financial distress and had to reorganize, the Illinois Terminal name was adopted to reflect the line's primary money making role as a freight interchange link to major steam railroads at its terminal ends, Peoria, Danville, and St. Louis. Interurban passenger service slowly was reduced, ending in 1956. Freight operation continued but was hobbled by tight street running in some towns requiring very sharp radius turns. In 1956, ITC was absorbed by a consortium of connecting railroads.

The Alton Railroad was the final name of a railroad linking Chicago to Alton, Illinois; St. Louis, Missouri; and Kansas City, Missouri. Its predecessor, the Chicago and Alton Railroad, was purchased by the Baltimore and Ohio Railroad in 1931 and was controlled until 1942 when the Alton was released to the courts. On May 31, 1947, the Alton Railroad was merged into the Gulf, Mobile and Ohio Railroad. Jacob Bunn had been one of the founding reorganizers of the Chicago & Alton Railroad Company during the 1860s.

The Illinois Terminal is an intermodal passenger transport center located at 45 East University Avenue in Champaign, Illinois, United States. The facility opened in January 1999 and provides Amtrak train service and various bus services to the Champaign-Urbana area.

Springfield Union Station in Springfield, Illinois, is a former train station and now part of the complex of buildings that together form the Abraham Lincoln Presidential Library and Museum. It is listed on the National Register of Historic Places, and is located at 500 East Madison Street in downtown Springfield, adjacent to the Lincoln Presidential Library.

Gilman station is an Amtrak intercity train station in Gilman, Illinois, United States. The stop is on their Illini and Saluki route.

Carbondale station is an Amtrak intercity train station in Carbondale, Illinois, United States. The southern terminus of Amtrak's Illini and Saluki routes, it is also served by the City of New Orleans. Amtrak Thruway Motorcoach service between Carbondale and St. Louis, Missouri connects with the City of New Orleans. Carbondale is the southernmost Amtrak station in Illinois.

Charles Sumner Frost was an American architect. He is best known as the architect of Navy Pier and for designing over 100 buildings for the Chicago and North Western Railway.

The Illinois State Bar Association (ISBA) is among largest voluntary state bar associations in the United States. Approximately 28,000 lawyers are members of the ISBA. Unlike some state bar associations, in which membership is mandatory, ISBA membership is not required of lawyers licensed to practice in Illinois and ISBA membership is completely voluntary. The ISBA is headquartered in Springfield, Illinois. It also has an office in Chicago, Illinois.

The Shawnee was a passenger train operated first by then Illinois Central Railroad and then by Amtrak between Chicago, Illinois and Carbondale, Illinois. It operated from 1969 until 1986.