In May 1862, the Homestead Act was signed into law and began creating new opportunities in agriculture for thousands of people.
The transcontinental railroad was also authorized by Congress at this time, allowing for agriculture to become the biggest business in America.
DeKalb, Kankakee, McHenry, Livingston, Will, DuPage, Kane and Tazewell counties all had organizations in place to assist in educating America's farmers.
By 1913, it was clear that there was a need for a statewide association, so on July 1, 1913, county advisors convened in Pontiac, Illinois, to discuss problems and experiences.
There were 13 charter members to the IAA that hailed from Adams, Bureau, Champaign, DeKalb, Iroquois, LaSalle, Livingston, Macon, Mason, McLean, Tazewell, Will and Woodford counties.