Currently 75° FAIR
Dew Point62°
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Diamond Lake

Lake County, Illinois
size in acres
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Diamond Lake is located in northeastern Lake County, within the Village of Mundelein.
A glacial origin lake, the majority of Diamond Lake bottom is owned by the Mundelein Park District, which it acquired in the late 1960s. Water exits the lake in the southeastern portion of the lake via a spillway that flows underground until it connects to Indian Creek. Diamond Lake is 153 acres; shoreline length 5.9 miles; watershed 686 acres (5 to 1); maximum depth 23 feet; average depth 7.6 feet. There are several ramps around the lake but only one is open to the public (fee required). It is a single, concrete boat ramp on the southeast end of the lake near the beach. No fishing boat rentals are available; a private bait shop is located 1 mile south of the ramp. No fish cleaning facilities are available.
All fish species, two pole and line fishing only. The one public boat ramp on the southeast end of the lake near the beach requires a fee for use.
How big is Diamond Lake?
Diamond Lake is approximately 149 sq acres (1 sq km) in size with 6 miles (9.5 km) of shoreline.
How deep is Diamond Lake?
Diamond Lake is approximately 23 feet (7.0 m) at its deepest point with an average depth of 8 feet (2.4 m).
What kind of fish are in Diamond Lake?
Anglers can expect to find a variety of fish including Black Crappie, Bluegill, Channel Catfish, Largemouth Bass, Muskie and Northern Pike in Diamond Lake.
When are the best fishing times for Diamond Lake?
Today fishing looks to be fairly active with peak fishing times around 9-11 am and 5-6 pm. For more more best fishing times visit our Diamond Lake Fishing Forecast page. Lake-Link Pro Members can get detailed fishing forecasts for up to 10 days in advance and species specific for Diamond Lake.
What are the closest cities to Diamond Lake?
Are there fishing guides for Diamond Lake?
Yes! There are fishing guides for Diamond Lake and/or the surrounding area. Please see the "Fishing Guides" section down a little further on this page.

Places To Stay

Diamond Lake Reviews

Give Your Review
colleen h.
Mundelein, IL
5 star rating
It is clean and a fun lake for water sports and fishing.
Reviewed Jul 2, 2022
esox h.
Diamond Lake, IL
3 star rating
Bass had been very active lately, flooding has slowed everything down.
Reviewed Jul 20, 2017
esox h.
Diamond Lake
3 star rating
Actually the lake is up to 23 ft deep, most of the water you can fish from the parks is very shallow. Good crappie and bass in the spring.
Reviewed Feb 12, 2012
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