Illinois topographic maps

1:24,000 scale Illinois topo quads

The index map below is for Illinois topo quads at 1:24,000 scale. It is zoomable, and you can find the name of the 1:24,000 scale map (sometimes abbreviated as "24k") written diagonally across rectangular boxes that define the borders of the individual 24k map sheets.

Note that a rare few of the 1:24,000 scale (aka 7.5 minute) maps in Illinois state might actually be at 1:25,000 scale, which is a very minor difference in map scale. Some of these 1:25,000 scale maps also cover a larger area than regular 7.5 minute maps. Those maps are 7.5´x15´ topo quads, and can be identified on the index map below by a larger sized rectangle that is twice as wide as usual (covers twice the longitude). The map names for these sheets are labelled horizontally, not diagonally.

Illinois Topo Index Map: 1:24,000

1:250,000 scale Illinois topo maps

Below you can find the 1:250,000 index map for Illinois state. These topo maps give a general overview of an area and cover a large area: 1° latitude by 2° longitude. A list of all Illinois topo map sheets at 250k follows on the right.

Illinois Topo Index Map: 1:250,000

1:100,000 scale Illinois topo maps

Below you can find the 1:100,000 index map for Illinois state. These topo maps give a more detailed overview of an area and cover a medium-sized area: 0.5° latitude by 1° longitude. A list of all Illinois topo map sheets at 100k follows on the right.

Illinois Topo Index Map: 1:100,000