Diamond Lake
Info / Lake County
Family Friendly
No
Handicap Access
No
Boat Fishing
Yes - Unrestricted
Boat Ramps
Yes
Boat Rentals
No
Camping
No
Picnicking
Yes - More Info
Skiing
Yes
Swimming
Yes
Trout Stocking
No
Zebra Mussels
Location 153 acres
Fishing Outlook
Black Crappie
Good
4 Black Crappie were collected. Fish ranged from 8.4” to 9.5” long. Fishermen often keep crappie at least 9” long so there is a harvestable fishery present. Like bluegill, added predation should help “grow” the crappie population in the future.
Largemouth Bass
Good
In 2021, 48 bass were collected in 50 minutes of DC electrofishing. Fish measured 3.7” to 20.1”, and weighed up to 4.7 lbs., 43% were over 12” long, 24% were over 14” long, and 19% were over 15” long. This size structure allows for quality angling opportunities and should create better pan fishing in the future. Site Regulation: 15” minimum length limit ; 3 fish daily creel limit.
Bluegill
Average
In 2021, 74 Bluegill were captured in 50 minutes of DC electrofishing. They ranged from 2.7” to 7.4”, 78% were longer than 6” and 12% were over 7” long. The expanding bass population and increasing muskie predation should help boost the size of panfish in Diamond Lake in the coming years.
Muskellunge
Developing
Muskie have been stocked in this lake beginning in 2013. Site Regulation: 36" minimum length limit, 1 fish daily creel limit.
Channel Catfish
Good
Annual stockings of 8” to 10” Channel Catfish maintains their presence. During this survey we collected 3 Channel Catfish ranging from 18.7” to 26.9”. Site Regulation: 6 fish daily creel limit.
| 2025 | Channel Catfish | Advanced Fingerling (4 - 7") | 752 |
| 2025 | Muskellunge | Adult | 100 |
| 2023 | Channel Catfish | NonVulnerable (8 - 10") | 758 |
| 2023 | Muskellunge | Adult | 100 |
Contact
847-566-0650
Description
A glacial origin lake, the majority of Diamond Lake bottom is owned by the Mundelein Park District and 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 and has a shoreline length 5.9 miles. It has a watershed of 686 acres (5 to 1), a maximum depth 23 feet and an 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.Fishery History
Occasional fish surveys are conducted to evaluate stocking success and changes in the fishery. Herbicides are occasionally applied in high-use areas to maintain recreational boat access because the shoreline is generally shallow and Eurasian watermilfoil is present in the system. Diamond Lake receives annual stockings of 8- to 10-inch Channel Catfish, 10-inch Northern Pike, and occasional stockings of 12-inch Muskie (beginning in 2013).Site Regulations
The one public boat ramp on the southeast end of the lake near the beach requires a fee for use.
Site-Specific Fishing Regulations:
- All Fish: 2 pole and line fishing only and each pole must not have more than 2 hooks or lures attached while fishing
- Channel Catfish: 6 Fish Daily Harvest Limit
- Large or Smallmouth Bass: 15 inch Minimum Length Limit; 3 Fish Daily Harvest Limit
- Muskie: 48 inch Minimum Length Limit; 1 Fish Daily Harvest Limit
- Northern Pike: 24 inch Minimum Length Limit; 3 Fish Daily Harvest Limit (statewide regulation)
Additional Information
Planning to eat your catch? Fish Consumption Advisory information can be found here: Fish Consumption Advisory PageBath Map
