Lakes / Illinois / Largest Lakes in Illinois

Largest Lakes in Illinois

Ranked by surface area, from USGS National Hydrography Dataset lake data. Flowages and reservoirs count here - size is size - and each is labeled in its own record.

#	Lake	County	Surface Area	Max Depth
1	Carlyle Lake	Clinton	22,796.77 acres	-
2	Mine Number 21 Reservoir	Franklin	17,062.04 acres	-
3	Upper Peoria Lake	Woodford	15,460.64 acres	-
4	Lake Shelbyville	Shelby	10,235.1 acres	-
5	Crab Orchard Lake	Williamson	7,292.57 acres	-
6	Senachwine Lake	Putnam	5,449.75 acres	-
7	Lake Clinton	De Witt	4,585.53 acres	-
8	Lake Springfield	Sangamon	3,899.08 acres	-
9	Quiver Lake	Mason	2,926.49 acres	-
10	Lake Decatur	Macon	2,904.48 acres	-
11	Spring Lake	Carroll	2,864.94 acres	-
12	Cross Slough	Mason	2,775.73 acres	-
13	Lake Chautauqua	Mason	2,723.3 acres	-
14	Braidwood Power Plant Cooling Pond	Will	2,539.39 acres	-
15	Nippersink Lake	Lake	2,492.93 acres	-
16	Kinkaid Lake	Jackson	2,332.92 acres	-
17	Sangchris Lake	Christian	2,260.03 acres	-
18	Lake of Egypt	Johnson	2,129.02 acres	-
19	LaSalle County Nuclear Station Cooling Pond	LaSalle	1,976.08 acres	-
20	Heidecke Lake	Grundy	1,913.34 acres	-
21	Baldwin Lake	Randolph	1,874.85 acres	-
22	Babb Slough	Marshall	1,785.21 acres	-
23	Horseshoe Lake	Alexander	1,784.84 acres	-
24	Newton Lake	Jasper	1,745.55 acres	-
25	Pistakee Lake	McHenry	1,743.58 acres	-
26	Cedar Lake	Jackson	1,614.59 acres	-
27	Grass Lake	Lake	1,582.22 acres	-
28	Jack Lake	Mason	1,500.58 acres	-
29	Treadway Lake	Cass	1,477.8 acres	-
30	Horseshoe Lake	Madison	1,426.29 acres	-
31	Powerton Cooling Lake	Tazewell	1,410.59 acres	-
32	Meredosia Lake	Morgan	1,404.55 acres	-
33	Stickey Lake	Fulton	1,401 acres	-
34	Duck Creek Cooling Pond	Fulton	1,399.11 acres	-
35	Lake Lou Yaeger	Montgomery	1,369.33 acres	-
36	Miserable Lake	Fulton	1,319.72 acres	-
37	Beebe Lake	Fulton	1,299.38 acres	-
38	Taylorville Lake	Christian	1,268.79 acres	-
39	Goose Lake	Marshall	1,113.46 acres	-
40	Dresden Cooling Lake	Will	1,105.8 acres	-
41	Lake Glenn Shoals	Montgomery	1,097.06 acres	-
42	West Hickory Lake	Carroll	924.51 acres	-
43	Lake Mattoon	Cumberland	907.62 acres	-
44	Little Grassy Lake	Williamson	905.39 acres	-
45	Coffeen Lake	Montgomery	881.18 acres	-
46	Evergreen Lake	McLean	877.22 acres	-
47	Billsbach Lake	Marshall	871.79 acres	-
48	Upper Stump Lake	Jersey	840.65 acres	-
49	Crane Lake	Mason	797.66 acres	-
50	Lake Vermilion	Vermilion	792.85 acres	-
51	East Fork Lake	Richland	788.51 acres	-
52	Governor Bond Lake	Bond	779.39 acres	-
53	Devils Kitchen Lake	Williamson	711.91 acres	-
54	Wonder Lake	McHenry	697.58 acres	-
55	Centralia Reservoir	Marion	645.08 acres	-
56	Vandalia Municipal Reservoir	Fayette	627.37 acres	-
57	Highland Silver Lake	Madison	615.29 acres	-
58	Lake Carroll	Carroll	605.9 acres	-
59	Lake Marie	Lake	595.03 acres	-
60	Lake Bloomington	McLean	593.05 acres	-
61	Lake Calumet	Cook	591.91 acres	-
62	Sawmill Lake	Putnam	556.48 acres	-
63	Lake Sara	Effingham	553.02 acres	-
64	Spoon Lake	Knox	546.84 acres	-
65	Depue Lake	Bureau	531.28 acres	-
66	Forbes Lake	Marion	523.37 acres	-
67	Wightman Lake	Marshall	491.49 acres	-
68	Lake Jacksonville	Morgan	461.59 acres	-
69	Meadow Lake	Peoria	457.14 acres	-
70	Matanzas Lake	Mason	437.25 acres	-
71	Curry Lake	Schuyler	426.5 acres	-
72	South Pool	Cook	425.86 acres	-
73	Otter Lake	Macoupin	419.34 acres	-
74	Apple Canyon Lake	Jo Daviess	397.1 acres	-
75	Long Lake	Lake	386.47 acres	-
76	Channel Lake	Lake	365.47 acres	-
77	Saganashkee Slough	Cook	359.29 acres	-
78	Moredock Lake	Monroe	357.56 acres	-
79	Watson Lake	Calhoun	353.61 acres	-
80	Lake Charleston	Coles	335.57 acres	-
81	Campbell Lake	Jackson	329.39 acres	-
82	Shabbona Lake	DeKalb	310.61 acres	-
83	Lake Holiday	LaSalle	309.38 acres	-
84	Bangs Lake	Lake	304.68 acres	-
85	Skokie Lagoons	Cook	301.94 acres	-
86	Otter Lake	Mason	301.22 acres	-
87	Cedar Lake	Lake	297.76 acres	-
88	Fourth Lake	Lake	297.02 acres	-
89	Tower Island Chute	Jackson	294.06 acres	-
90	Big Lake	Brown	293.56 acres	-
91	Washington County Lake	Washington	287.14 acres	-
92	Vulcan Lakes	McHenry	275.77 acres	-
93	Smith Lake	Scott	273.79 acres	-
94	Orland Lake	Cook	273.39 acres	-
95	Lake Summerset	Winnebago	271.32 acres	-
96	Silver Lake	Calhoun	270.83 acres	-
97	Schuy-Rush Lake	Schuyler	251.55 acres	-
98	Spring Lake	McDonough	251.55 acres	-
99	Lake Centralia	Marion	249.58 acres	-
100	Moscow Lake	Mason	249.33 acres	-

Showing the top 100 of 511 counted lakes. Search above, or browse by county on the Illinois page, for the full inventory.

Source: USGS National Hydrography Dataset lake data. Verified October 30, 2026. New lakes are added as their records are verified - rankings update with every addition.