Decatur is a city in and the county seat of Macon County, located in the central part of the state of Illinois, United States. As of the 2020 United States Census, the city had a population of 70,634, making it the largest city in the region and one of the larger municipalities in the state. Decatur is part of the Decatur Metropolitan Statistical Area, which encompasses all of Macon County.
History
The area that would become Decatur was first settled in the 1820s. The town was officially platted in 1829 and incorporated as a city in 1836. It was named in honor of Stephen Decatur, a celebrated United States Navy officer of the early 19th century. Throughout the 19th century, Decatur developed as a transportation hub, benefiting from the convergence of several railroad lines and its location on the Sangamon River.
In the early 20th century the city expanded its industrial base, becoming a center for agricultural processing and manufacturing. Major firms such as the International Harvester Company (later Caterpillar Inc.) and Archer Daniels Midland (ADM) established large facilities in the city, earning Decatur the nickname “Soybean Capital of the World.” The city’s economy remained diversified through the post‑World‑War II era, although it experienced declines in manufacturing employment in the later decades of the 20th century.
Geography
Decatur is situated at approximately 39°50′ N latitude and 88°57′ W longitude, on the banks of the Sangamon River. According to the United States Census Bureau, the city has a total area of 27.5 square miles (71.2 km²), of which 27.3 square miles (70.7 km²) is land and 0.2 square miles (0.5 km²) is water.
Climate
The city lies within a humid continental climate zone (Köppen Dfa), characterized by hot, humid summers and cold, snowy winters. Average high temperatures in July are in the upper 80s °F (≈ 30 °C), while average lows in January are in the low teens °F (≈ ‑10 °C). Precipitation is relatively evenly distributed throughout the year, with an annual total of roughly 38 inches (≈ 970 mm).
Demographics
According to the 2020 Census, Decatur's population of 70,634 was composed of the following racial and ethnic groups:
- White (non‑Hispanic): approximately 71 %
- Black or African American: approximately 24 %
- Hispanic or Latino (of any race): approximately 3 %
- Asian, Native American, and other races: the remainder
The median household income reported in the American Community Survey for the period 2019‑2023 was around $41,000, with a poverty rate of roughly 19 %. Educational attainment levels indicated that about 86 % of residents age 25 and over had a high school diploma, and 22 % held a bachelor’s degree or higher.
Economy
Decatur’s economy is anchored by agriculture‑related processing, manufacturing, and health care. Key employers include:
- Archer Daniels Midland (ADM) – grain and oilseed processing facilities
- Caterpillar Inc. – manufacturing of construction equipment (operations largely consolidated in other locations but still a significant presence)
- Decatur Memorial Hospital – health‑care provider and major employer
- Millikin University and Richland Community College – education sector employers
- Dow AgroSciences – agrochemical research and production
The city’s location at the intersection of Interstate 72 and Interstate 57, along with a freight rail network, supports its logistics and distribution activities.
Education
Public education is provided primarily by Decatur Public Schools District 144, which operates several elementary schools, a middle school, and Decatur High School. Additional public school districts serve portions of the metropolitan area. Post‑secondary institutions include:
- Millikin University – a private liberal‑arts university offering undergraduate and graduate programs.
- Richland Community College – a two‑year public college with campuses in Decatur and neighboring towns.
- Illinois State University – operates a satellite campus offering selected undergraduate courses.
Transportation
Decatur is served by a network of highways, including Interstates 72 and 57, U.S. Route 51, and Illinois Routes 48 and 105. The Decatur Regional Airport (DEC) provides commercial air service with scheduled flights primarily to Chicago O’Hare International Airport. Passenger rail service is available via Amtrak’s Illini and Texas Eagle routes, with a station downtown. Local transit is provided by the Decatur Public Transit System (DPTS), which operates bus routes throughout the city and adjacent communities.
Culture and Recreation
The city hosts several cultural institutions and annual events:
- The Children's Museum of Illinois – interactive museum for children.
- The Decatur Museum of Illinois History – exhibits on regional heritage.
- The Stephen A. Douglas House – historic home of the 19th‑century U.S. senator.
- Decatur Celebration – a summer festival featuring live music, fireworks, and community activities.
Parks and recreation areas include Scovill Zoo, Fisk Park, and extensive riverfront trail systems along the Sangamon River.
Notable People
Individuals associated with Decatur include:
- Carl Sandburg (poet, biographer of Abraham Lincoln) – attended school in Decatur.
- Bob Turley (Hall of Fame Major League Baseball pitcher).
- William D. Boyce (founder of the Boy Scouts of America) – born in the Decatur area.
- Gloria Hunt (business executive; former CEO of the National Basketball Association).
References
- United States Census Bureau, 2020 Decennial Census.
- City of Decatur official website, municipal reports.
- Illinois Department of Commerce and Economic Opportunity, regional economic profiles.
- National Weather Service climate data for Decatur, Illinois.
This entry provides a concise, factual overview of Decatur, Illinois, based on publicly available governmental and institutional sources.