| County/Equivalent | Elevation | Prominence | Name | State | Quadrangle |
| McHenry | 1,189' | 282' | Koltz Benchmark | IL | Harvard |
| Kane | 1,065' | 170' | Plato Benchmark | IL | Pingree Grove |
| Boone | 1,055' | 70' | Boone County HP | IL | Capron |
| Lee | 1,005' | 170' | Lee County HP | IL | Compton |
| DeKalb | 995' | 83' | Risetter Benchmark | IL | Lee |
| Lake | 957' | 72' | Gander Mountain | IL | Fox Lake |
| Cook | 955' | 180' | Cook County HP | IL | Streamwood |
| LaSalle | 925' | 120' | LaSalle County HP | IL | Sublette |
| DuPage | 855' | 0' | DuPage County HP | IL | West Chicago |
| Will | 835' | 150' | Hickory Benchmark | IL | Frankfort |
| Kendall | 815' | 170' | Kendall County HP | IL | Plattville |
| Kankakee | 757' | 55' | Kankakee County HP | IL | Herscher |
| Grundy | 705' | 0' | Grundy County HP | IL | Stavanger |
| Porter | 875' | 70' | Porter County HP | IN | Westville |
| Lake | 795' | 10' | Lake County HP | IN | Palmer |
| Walworth | 1,155' | 160' | Walworth County HP | WI | Walworth |
| Kenosha | 995' | 200' | Kenosha County HP | WI | Fox Lake |
| Racine | 952' | 147' | Waterford Benchmark | WI | Waterford |
| Milwaukee | 865' | 0' | Milwaukee County HP | WI | Hales Corners |