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Coffeen Lake

Coffeen Lake, located in Illinois' west central region, in Montgomery County, provides over 1,100 acres of recreational waters for year-round enjoyment. An earthen dam, built on Shoal Creek created the lake to serve as cooling waters for the coal-burning, power generating plant owned by Ameren Energy Generating Company, Coffeen Lake is cooperatively managed by the power company and the Illinois Department of Natural Resources (IDNR). Recreational activities are under the control of the IDNR and include hunting, fishing, boating and picnicking.

Coffeen Lake State Park's terrain of oak and hickory forests make the area conducive to harboring a variety of wildlife.


Although the operation of the power plant influences fish activity, Coffeen Lake is home to 22 thriving fish species with an exceptional population of largemouth bass, striped bass, white crappie and channel catfish. Site-specific regulations for crappie and bass are posted and enforced.

North of the main access area, near the private campground, boating and fishing supplies and food can be purchased.

The Illinois Department of Natural Resources Division of Fisheries offers "Hook-and-Line" and "Spear/Bow and Arrow" Sport Fishing Awards to recognize anglers for fish caught in Illinois' waters. (See "Resources for this page" to learn more.)


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    Coffeen Lake Illinois Coordinates:
39.0373N -89.3529W
Map It:
Lake Type:
Surface Area:
1,070 acres
Maximum Depth:
58 ft
589 ft
Normal Water Clarity:
3-6 ft
Major City:


Coffeen Lake welcomes non-motorized and boats with motors not exceeding 25 horsepower. This includes boats such as pontoons, runabouts, small fishing boats, canoes, rowboats, kayaks and sailboats.

Several public boat launch ramps, including handicap-accessible ramps and parking stalls, available around the lake offering easy access to the water for everyone.


Coffeen Lake lodging options include a private campground north of the main access area. In nearby towns, the options vary from primitive campsites to luxurious hotels and resorts.

Please consult the Lake Resource Guide for information on lodging and events in the area.


Illinois' closest major city to Coffeen Lake is Springfield. Nearby cities and towns, each with its own unique offerings, include: Coffeen, Taylorville, Collinsville, Donnellsville, Godfrey and Shiloh. Coffeen Lake flows through parts of Montgomery county.

Fun times at Coffeen Lake  Coffeen Lake

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Average Temperatures Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Avg. High  38 Avg. High  44 Avg. High  55 Avg. High  68 Avg. High  77 Avg. High  86 Avg. High  89 Avg. High  88 Avg. High  81 Avg. High  69 Avg. High  55 Avg. High  41
Avg. Low  21 Avg. Low  25 Avg. Low  35 Avg. Low  45 Avg. Low  55 Avg. Low  64 Avg. Low  68 Avg. Low  66 Avg. Low  57 Avg. Low  46 Avg. Low  36 Avg. Low  25