1. Wisconsin Driftless Division

2. Rock River Hill Country Division
a. Freeport Section
b. Oregon Section

3. Northeastern Moranial Division
a. Morainal Section
b. Lake Michigan Dunes Section
c. Chicago Lake Plain Section
d. Winnebago Section

4. Grand Prairie Division
a. Grand Prarie Section
b. Springfield Section
c. Western Section
d. Green River Lowland Section
e. Kankakee Sand Area Section

5. Upper Mississippi River and Illinois River Bottomlands Divisiona. Illinois River Section
b. Mississippi River Section

6. Illinois River and Mississippi River Sand Areas Division
a. Illinois River Section
b. Mississippi River Section

7. Western Forest-Prairie Division
a. Galesburg Section
b. Carlinville Section

8. Middle Mississippi Border Division
a. Glaciated Section
b. Driftless Section

9. Southern Till Plain Division
Wabash Border Division
a. Effingham Plain Section
b. Mt. Vernon Hill Country Section

10. Wabash Border Division
a. Bottomlands Section
b. Southern Uplands Section
c. Vermilion River Section

11. Ozark Division
a. Northern Section
b. Central Section
c. Southern Section

12. Lower Mississippi River Bottomlands Division
a. Northern Section
b. Southern Section

13. Shawnee Hills Division
a. Greater Shawnee Hills Section
b. Lesser Shawnee Hills Section

14. Coastal Plain Division
a. Cretaceous Hills Section
b. Bottomlands Section

This map is based on the configurations developed by John E. Schwegman.