Deepest Lakes in Minnesota & Wisconsin

The 50 deepest lakes ranked by maximum depth in feet. Deeper lakes tend to have better water quality because thermal stratification helps keep nutrients from mixing throughout the water column.

Rank	Lake	County	State	Max Depth	Area	Grade	Clarity
1	Gilbert Pit Lake	St. Louis	MN	443 ft	243.41 acres	B	11.5 ft
2	St James Pit Lake	St. Louis	MN	381 ft	124.18 acres	A	47.6 ft
3	Wazee Lake	Jackson	WI	350 ft	146 acres	A	105.8 ft
4	Iron Chief Complex Lake	St. Louis	MN	262.1 ft	207.44 acres	A	24.5 ft
5	Green Lake	Green Lake	WI	236 ft	7.9K acres	B	13.3 ft
6	Green Lake	Green Lake	WI	236 ft	7.9K acres	B	13 ft
7	Green Lake	Green Lake	WI	236 ft	7.9K acres	B	14.1 ft
8	Green Lake East Basin	Green Lake	WI	236 ft	7.9K acres	B	11.8 ft
9	Green Lake	Green Lake	WI	236 ft	7.9K acres	C	13.1 ft
10	City Millpond	Green Lake	WI	236 ft	7.9K acres	C	-
11	Silver Creek Estuary Lake	Green Lake	WI	236 ft	7.9K acres	F	-
12	Lasalle Lake	Hubbard	MN	213 ft	237.9 acres	B	6.9 ft
13	Watap Lake	Cook	MN	210 ft	2.0K acres	C	9 ft
14	Gabimichigami Lake	Cook	MN	209 ft	1.2K acres	B	14 ft
15	Ten Mile Lake	Cass	MN	208 ft	5.1K acres	A	20 ft
16	Loon Lake	Cook	MN	202 ft	1.1K acres	A	18 ft
17	Gunflint Lake	Cook	MN	200 ft	4.0K acres	A	20 ft
18	Little Gunflint Lake	Cook	MN	200 ft	4.0K acres	A	16.2 ft
19	Strup Lake	Lake	MN	195 ft	1.7K acres	C	9.7 ft
20	Sand Point Lake	St. Louis	MN	184 ft	8.5K acres	C	7.5 ft
21	Sand Point Lake	St. Louis	MN	184 ft	8.5K acres	D	6.6 ft
22	Sand Point Lake	St. Louis	MN	184 ft	8.5K acres	D	5.9 ft
23	Larson Lake	Itasca	MN	177 ft	208.18 acres	A	21 ft
24	Lac la Croix Lake	St. Louis	MN	168 ft	29.6K acres	C	8.6 ft
25	Crooked Lake	Lake	MN	165 ft	10.4K acres	C	9 ft
26	Carlos Lake	Douglas	MN	163 ft	2.6K acres	A	17.2 ft
27	Alvin Lake	Douglas	MN	163 ft	2.6K acres	B	10.5 ft
28	Rainy Lake	St. Louis	MN	161 ft	210.2K acres	C	9.5 ft
29	Rainy Lake	St. Louis	MN	161 ft	210.2K acres	C	7.2 ft
30	Rainy Lake	Koochiching	MN	161 ft	210.2K acres	C	7.5 ft
31	Rainy Lake	Koochiching	MN	161 ft	210.2K acres	D	3.6 ft
32	Rainy Lake	St. Louis	MN	161 ft	210.2K acres	D	5.9 ft
33	Rainy Lake	Koochiching	MN	161 ft	210.2K acres	D	6.6 ft
34	Rainy Lake	Koochiching	MN	161 ft	210.2K acres	D	4.9 ft
35	Rainy Lake	Koochiching	MN	161 ft	210.2K acres	D	3.6 ft
36	Rainy Lake	Koochiching	MN	161 ft	210.2K acres	D	5.2 ft
37	Trout Lake	Itasca	MN	157 ft	1.7K acres	A	18 ft
38	Caribou Lake	Itasca	MN	152 ft	246.5 acres	A	31 ft
39	Kabekona Bay Lake	Cass	MN	150 ft	103.4K acres	A	17.2 ft
40	Steamboat Bay Lake	Cass	MN	150 ft	103.4K acres	B	9.8 ft
41	Namakan Lake	St. Louis	MN	150 ft	24.1K acres	B	11.5 ft
42	Snowbank Lake	Lake	MN	150 ft	4.7K acres	B	11 ft
43	Namakan Lake	St. Louis	MN	150 ft	24.1K acres	C	8.2 ft
44	Namakan Lake	St. Louis	MN	150 ft	24.1K acres	C	9.8 ft
45	Little Saganaga Lake	Cook	MN	150 ft	1.6K acres	C	9.3 ft
46	Namakan Lake	St. Louis	MN	150 ft	24.1K acres	D	4.1 ft
47	16-0524-00 Lake	Cook	MN	142 ft	837.01 acres	A	15 ft
48	Six Lake	Otter Tail	MN	140 ft	196.53 acres	A	20.2 ft
49	Elmo Lake	Washington	MN	140 ft	256.82 acres	B	11.2 ft
50	South Lake	Cook	MN	140 ft	1.1K acres	C	8 ft

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