A website called Rynerohla has, since about a week after Election Day, been compiling and adding red-blue maps of states by precinct.
It just added Illinois today. Before you click, your browser will probably downscale this very large (7000 x 9280) image to fit your browser. If you click on it to make it native size, it will take a few seconds to show.
Just looking at it, without knowing anything else, you wonder how Trump didn’t win it. But then you come back to your senses and realize that there are a whole hell of a lot of people where all the blue is up in the upper right corner.