Deepest lakes & reservoirs in Northern Illinois by maximum depth (ft)
The estimated greatest depth of the water in a lake can be measured at the lake’s normal elevation. If the water volume and surface area of a lake are known, an estimate of the lake’s average depth can be calculated:Water volume ÷ Surface Area = Average Depth
Example: 1,000,000 acre-feet ÷ 20,000 acres = 50 feet average depth.
You can find many of the the world’s deepest lakes on LakeLubbers. If you sort the list, you will find the (maximum depth of) the shallowest lakes in our database. Note: For some lakes, lake depth data is unknown, so this table may display fewer lakes than the total 7 articles we have published for Northern Illinois lakes.
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Below are lakes within USA > US Midwest Region > Illinois > Northern Illinois > Compared by maximum depth in feet. This list does not represent all lakes in Northern Illinois, only the 7 Northern Illinois lake articles we have published on the LakeLubbers website.
Lake name  |
Max depth in feet |
Lake description |
|---|---|---|
| Apple Canyon Lake, IL (Illinois, Northern Illinois, US Midwest Region, USA) |
70 ft | Set among the rolling hills and fertile farmland of far northwestern Illinois, life at Apple Canyon Lake is an eternal vacation. Located in scenic Jo… |
| Lake Thunderbird, IL (Illinois, Northern Illinois, US Midwest Region, USA, Western Illinois) |
66 ft | Nestled in the rural Illinois woods, Lake Thunderbird is set in Putnam County, the smallest county in Illinois. The lake, located on the border of the… |
| Lake Carroll, IL (Illinois, Northern Illinois, US Midwest Region, USA) |
55 ft | Lake Carroll is a sparkling freshwater lake located in Carroll County, in the northwest corner of Illinois. This private body of water sits in the mid… |
| Lake Galena (Illinois, Northern Illinois, US Midwest Region, USA) |
50 ft | Also known as Galena Lake, Galena Reservoir Tucked in a corner of the Northern Region of Illinois, Lake Galena presents one of the finest examples of a well-planned manmade lake. Galena Reservoi… |
| Elizabeth Lake, IL/WI (Illinois, Lake Michigan Region, WI, Northern Illinois, US Midwest Region, USA, Wisconsin) |
32 ft | Also known as Lake Elizabeth, Twin Lakes Lake Elizabeth or Elizabeth Lake, as it is more commonly known, has been a vacation getaway for over 150 years. Located in the Northern Region of Illi… |
| Candlewick Lake, IL (Illinois, Northern Illinois, US Midwest Region, USA) |
22 ft | Tucked away in the northern region of Illinois, 60 miles west of Chicago, Candlewick Lake offers respite at the end of a long day or recreation during… |