As the world's 19th largest economy, Illinois' is also one of the most diverse. In this section, you can learn more about some of our key industries. Some are mature, having been the crux of our economy for quite awhile, while others have only come to prominence in recent years. Illinois' highly educated and strong workforce have helped Illinois to develop a world class business presence. Please read on to learn more, and let us know how we can help your company or industry thrive in our powerful, vibrant economy.