Lakes / Idaho / Largest Lakes in Idaho

Largest Lakes in Idaho

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	Lake Pend Oreille	Bonner	92,764.44 acres	-
2	American Falls Reservoir	Power	55,319.78 acres	-
3	Coeur d'Alene Lake	Kootenai	26,891.64 acres	-
4	Lake Cascade	Valley	25,043.4 acres	-
5	Priest Lake	Bonner	23,425.59 acres	-
6	Blackfoot Reservoir	Caribou	16,913.5 acres	-
7	Dworshak Reservoir	Clearwater	16,362.33 acres	-
8	Palisades Reservoir	Bonneville	13,913.74 acres	-
9	Brownlee Reservoir	Washington	12,535.1 acres	-
10	Lake Walcott	Cassia	11,782.92 acres	-
11	Island Park Reservoir	Fremont	7,550.45 acres	-
12	Lake Lowell	Canyon	7,083.31 acres	-
13	C J Strike Reservoir	Owyhee	6,207.99 acres	-
14	Henrys Lake	Fremont	6,189.87 acres	-
15	Payette Lake	Valley	5,074.67 acres	-
16	Anderson Ranch Reservoir	Elmore	4,515.55 acres	-
17	Lake Hayden	Kootenai	3,857.81 acres	-
18	Chatcolet Lake	Benewah	3,530.95 acres	-
19	Mud Lake	Bear Lake	3,486.45 acres	-
20	Mud Lake	Jefferson	3,117.73 acres	-
21	Magic Reservoir	Blaine	3,078.58 acres	-
22	Deadwood Reservoir	Valley	2,960.73 acres	-
23	Crane Creek Reservoir	Washington	2,920.79 acres	-
24	Salmon Falls Creek Reservoir	Twin Falls	2,886.56 acres	-
25	Lucky Peak Lake	Ada	2,761.51 acres	-
26	Arrowrock Reservoir	Elmore	2,287.75 acres	-
27	Spirit Lake	Kootenai	1,548.86 acres	-
28	Redfish Lake	Custer	1,503.88 acres	-
29	Little Payette Lake	Valley	1,460.92 acres	-
30	Mormon Reservoir	Camas	1,440.32 acres	-
31	Ririe Reservoir	Bonneville	1,387.47 acres	-
32	Upper Priest Lake	Bonner	1,339.81 acres	-
33	Chesterfield Reservoir	Caribou	1,264.44 acres	-
34	Paddock Valley Reservoir	Washington	1,182.15 acres	-
35	Mackay Reservoir	Custer	1,177.96 acres	-
36	Little Camas Reservoir	Elmore	1,048.34 acres	-
37	Alexander Reservoir	Caribou	1,007.26 acres	-
38	Ross Lake	Owyhee	1,005.72 acres	-
39	Cedar Creek Reservoir	Twin Falls	957.53 acres	-
40	Twin Lakes	Kootenai	914.29 acres	-
41	Black Canyon Reservoir	Gem	876.47 acres	-
42	Lower Goose Creek Reservoir	Cassia	852.2 acres	-
43	Alturas Lake	Blaine	837.69 acres	-
44	Murtaugh Lake	Twin Falls	819.4 acres	-
45	Cocolalla Lake	Bonner	815.2 acres	-
46	Cave Lake	Kootenai	760.41 acres	-
47	Lost Valley Reservoir	Adams	726 acres	-
48	Swan Lake	Kootenai	669.13 acres	-
49	Hauser Lake	Kootenai	603.68 acres	-
50	Rays Lake	Jefferson	597.9 acres	-
51	Little Wood River Reservoir	Blaine	578.47 acres	-
52	Wilson Lake Reservoir	Jerome	518.43 acres	-
53	Anderson Lake	Kootenai	502.86 acres	-
54	Killarney Lake	Kootenai	501.62 acres	-
55	Harrison Slough	Kootenai	493.04 acres	-
56	Twin Lakes Reservoir	Franklin	439.35 acres	-
57	Oneida Narrows Reservoir	Franklin	429.96 acres	-
58	Warm Lake	Valley	422.55 acres	-
59	Mountain View Lake	Owyhee	416.37 acres	-
60	Bybee Reservoir	Owyhee	407.61 acres	-
61	Pettit Lake	Blaine	398.35 acres	-
62	Thompson Lake	Kootenai	395.02 acres	-
63	Juniper Lake	Owyhee	389.26 acres	-
64	Black Lake	Kootenai	380.3 acres	-
65	Goose Lake	Adams	378.07 acres	-
66	Fernan Lake	Kootenai	364.97 acres	-
67	Rose Lake	Kootenai	353.85 acres	-
68	Blue Lake	Kootenai	348.9 acres	-
69	Ben Ross Reservoir	Adams	340.02 acres	-
70	Grays Lake	Bonneville	337.33 acres	-
71	Sheridan Reservoir	Clark	322.97 acres	-
72	Rough Lake	Owyhee	321.73 acres	-
73	Upper Payette Lake	Valley	310.83 acres	-
74	Ashton Reservoir	Fremont	286.85 acres	-
75	Bliss Reservoir	Gooding	286.59 acres	-
76	Brundage Reservoir	Adams	281.7 acres	-
77	Horsethief Reservoir	Valley	247.46 acres	-
78	Fish Creek Reservoir	Blaine	244.88 acres	-
79	Sage Hen Reservoir	Gem	237.6 acres	-
80	Juniper Basin Reservoir	Owyhee	233.02 acres	-
81	Equalizing Reservoir	Bingham	230.3 acres	-
82	Mann Creek Reservoir	Washington	230.3 acres	-
83	Daniels Reservoir	Oneida	229.6 acres	-
84	Leavitz Pond	Jefferson	212.23 acres	-
85	Glendale Reservoir	Franklin	207.57 acres	-
86	Pioneer Reservoir	Gooding	204.36 acres	-
87	Medicine Lake	Kootenai	203.86 acres	-
88	Sandhole Lake	Jefferson	201.73 acres	-
89	Whites Reservoir	Owyhee	196.2 acres	-
90	Yellow Belly Lake	Custer	193.48 acres	-
91	Big Blue Creek Reservoir	Owyhee	185.58 acres	-
92	Benewah Lake	Benewah	181.6 acres	-
93	Williams Lake	Lemhi	181.38 acres	-
94	Stanley Lake	Custer	180.14 acres	-
95	Blair Trail Reservoir	Elmore	177.67 acres	-
96	Sawtooth Lake	Custer	173.47 acres	-
97	Henry Lake	Owyhee	171.74 acres	-
98	Deep Creek Reservoir	Oneida	168.25 acres	-
99	Little Valley Reservoir	Bonneville	166.29 acres	-
100	Gamlin Lake	Bonner	163.34 acres	-

Showing the top 100 of 316 counted lakes. Search above, or browse by county on the Idaho 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.