Walther Theological Seminary

Roosevelt Junior High School is a historic school located at 701 West Grand Avenue in Decatur, Illinois. Built from 1917 to 1921, the school was the second exclusive middle school in the city behind the now closed Centennial Junior High School. Decatur architectural firm Brooks, Bramhall & Dague designed the school in the Collegiate Gothic style, a popular choice for educational buildings at the time. The three-story building is built from red brick and features terra cotta trim designed to resemble stone. The front entrance is designed to resemble a castle's keep, with octagonal turrets on either side and the extensive use of terra cotta to form arches, piers and spandrels. The rest of the building features buttresses and Gothic arches throughout, and a battlement surrounds the edge of the roof. The school operated continuously from its opening until 2000.The school was added to the National Register of Historic Places on May 9, 2002.

Douglas MacArthur High School is a public high school located in Decatur, Illinois. The school serves about 1,184 students from grades 9 to 12 in Decatur Public School District 61.

Macon County is a county located in the U.S. state of Illinois. According to the 2020 United States Census, it had a population of 103,998. Its county seat is Decatur.Macon County comprises the Decatur, IL Metropolitan Statistical Area.

Decatur Township is in Macon County, Illinois. At the 2010 census, its population was 52,915 and it contained 24,918 housing units.

Spring Creek is a stream in Macon County, Illinois. A tributary of Stevens Creek, itself a tributary of the Sangamon River, Spring Creek originates just northeast of the town of Forsyth before emptying into Stevens Creek west of Horace B. Garman Park in Decatur, Illinois.

St. Teresa High School is a private, Roman Catholic high school in Decatur, Illinois. It is located in the Roman Catholic Diocese of Springfield in Illinois.

Millikin University is a private college in Decatur, Illinois. It was founded in 1901 by prominent Decatur businessman James Millikin and is affiliated with the Presbyterian Church (USA).

WJMU (89.5 FM, "The Quad") is a radio station broadcasting an alternative music format. Licensed to Decatur, Illinois, United States, the station serves the Decatur area. The station is currently owned by Millikin University.

The James Millikin House is a historic house located at 125 N. Pine St. in Decatur, Illinois. The house was built in 1876 for James Millikin, a wealthy Decatur businessman who later founded Millikin University. The house has a towered Italianate design which has been called the "most imposing Victorian remnant" in Decatur. A mansard roof on the tallest tower provides a Second Empire influence to the design. The house's interior decorations include colored marble fireplaces, art glass windows, and a fresco above the main staircase.The house was added to the National Register of Historic Places on December 3, 1974. Millikin University currently owns the house, which is open to the public as a museum.

Area codes 217 and 447 are telephone area codes in the North American Numbering Plan (NANP) for much of the central part of the U.S. state of Illinois. The numbering plan area (NPA) includes the state capital, Springfield, and Champaign, Urbana, Decatur, Taylorville, Lincoln, Danville, Effingham, Quincy, Rantoul, and Jacksonville. 217 was one of the original North American area codes created in 1947 and 447 was added to the same area in 2021 to form an all-services overlay.

The Decatur Historic District is a residential historic district in the Millikin Heights neighborhood of Decatur, Illinois. The district encompasses the city's historic Near West and Southwest neighborhoods and was formed beginning in the 1850s and continuing through the 1920s. Nearly all of the popular architectural styles from this period are represented in the district. A number of professional architects, including Frank Lloyd Wright, designed homes in the district, giving it exceptionally high-quality architecture. The earlier houses mainly have Italianate designs; several Gothic Revival buildings from this period are also included. The Queen Anne and Classical Revival styles were popular in houses built in the late 19th century, though Romanesque and Tudor Revival houses were also designed in this period. The early 20th century brought the district the Colonial Revival style and several independent styles associated with the more prominent architects such as Wright.The district was added to the National Register of Historic Places on November 7, 1976.

The West End Historic District is a residential historic district located in western Decatur, Illinois. The district, which was primarily built in the first half of the 20th century, includes over 1,700 contributing buildings. The West End was a popular neighborhood for Decatur's business owners and managers at its large industries, and the majority of its residents came from upper-middle class occupations; however, the district also had many working-class residents. A diverse array of architecture is featured in the district; twenty-three different architectural styles and twelve vernacular types are represented in its homes. The Dutch Colonial Revival and American Craftsman styles are the most prevalent, along with the latter's related vernacular type, the bungalow; the English Revival, Colonial Revival, Prairie School, and Georgian Revival styles also had a significant influence on the district's character.The district was added to the National Register of Historic Places on November 27, 2002.