Lowest and Highest Points in Cook County
Low Elevation:
<580 feet above mean sea level
Low Place:
Lake Michigan Shoreline
Low Quad Name:
Chicago Loop (etal.)
Low PLSS:
3-28-40N-14E
Low Geology:
Ravinia Formation, beach deposits
High Elevation:
>950 feet above mean sea level
High Place:
unnamed hilltop
High Quad Name:
Streamwood
High PLSS:
3-18-42N-9E
High Geology:
West Chicago Moraine
Area:
949.20 square miles
Total Relief:
370 feet
Percent Slope:
0.64%