On May 9 and 10, 1860, the Illinois Republican State Convention was held in Decatur. John Hanks, first cousin of Abe Lincoln, lived in Decatur. The original courthouse is now on the grounds of the Macon County Historical Museum on North Fork Road. As a lawyer on the 8th Judicial Circuit, Lincoln made frequent stops in Decatur, and argued five cases in the log courthouse that stood on the corner of Main & Main Streets. At the age of 21, Lincoln gave his first political speech in Decatur about the importance of Sangamon River navigation that caught the attention of Illinois political leaders. The plaque reads 'Abraham Lincoln's first political speech: Lincoln mounted a stump by Harrell's Tavern facing this square and defended the Illinois Whig party candidates near this spot at age 21 in the summer of 1830'.Дecatur was the first home in Illinois of Abraham Lincoln, who settled just west of Decatur with his family in 1830. Statue of Abraham Lincoln in downtown Decatur on the site of his first political speech. In addition, the Robert Mueller Residence, 1 Millikin Place, and the Adolph Mueller Residence, 4 Millikin Place, have been attributed to Wright's assistants Hermann V. Irving House, designed by Frank Lloyd Wright and built in 1911, is located at No. 1 of the Grand Army of the Republic was founded by Civil War veterans in Decatur on April 6, 1866. The Potawatomi Trail of Death passed through here in 1838. Main Street program, in conjunction with the National Trust for Historic Preservation. The city is named after War of 1812 naval hero Stephen Decatur.

Decatur has an economy based on industrial and agricultural commodity processing and production, including the North American headquarters of agricultural conglomerate Archer Daniels Midland, international agribusiness Tate & Lyle's largest corn-processing plant, and the designing and manufacturing facilities for Caterpillar Inc.'s wheel-tractor scrapers, compactors, large wheel loaders, mining class motor grader, off-highway trucks, and large mining trucks. The city is home of private Millikin University and public Richland Community College. Decatur is the seventeenth-most populous city in Illinois.

The city was founded in 1829 and is situated along the Sangamon River and Lake Decatur in Central Illinois. state of Illinois, with a population of 70,522 as of the 2020 Census. Decatur ( / d ЙЄ Л€ k eЙЄ t Й™r/ dih- KAY-tЙ™r) is the largest city and the county seat of Macon County in the U.S.

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