Detailed maps of Illinois, printable IL maps online: Find detailed maps of Illinois, including online Illinois tourist maps, county maps, blank and outline maps.
13,000,000 (5th in US)
10 largest cities:
State Parks: 124
Get more Illinois USGS Topo Maps at our map store. These topographic maps are available for purchase, and you can download them as high-resolution PDFs as well.
Alternatively, you can buy them on disk as digital map collections: USGS digital topo maps
A selection of Illinois maps in our topo map collection:
View all Illinois USGS topo maps, including index maps that help you find the Illinois topo quads you are looking for.