Lakes / Wyoming / Johnson County

Lakes in Johnson County, Wyoming

33 lakes counted in Johnson County - the largest is Lake De Smet at 3,331.88 acres.

Lakes Counted

3,331.88 acres

Largest - Lake De Smet

121 ft

Deepest - Lost Twin Lakes

Johnson County, highlighted, with its largest counted lakes dotted. Outlines from Census boundary data.

All Counted Lakes

#	Lake	County	Surface Area	Max Depth
1	Lake De Smet	Johnson	3,331.88 acres	-
2	Healy Reservoir	Johnson	205.15 acres	-
3	Willow Park Reservoir	Johnson	201.88 acres	-
4	Kearney Lake	Johnson	178.41 acres	-
5	Cloud Peak Reservoir	Johnson	172.75 acres	-
6	Bighorn Reservoir	Johnson	165.34 acres	-
7	Dullknife Reservoir	Johnson	117.57 acres	-
8	Elk Lake	Johnson	83.14 acres	-
9	Lake Angeline	Johnson	56.34 acres	-
10	Cross Creek Reservoir	Johnson	55.23 acres	-
11	Baker Number 1 Reservoir	Johnson	53.75 acres	-
12	Glacier Lake	Johnson	51.18 acres	-
13	Purdy Reservoir	Johnson	42.5 acres	-
14	Moore Reservoir	Johnson	41.02 acres	-
15	Lost Twin Lakes	Johnson	41 acres	121 ft
16	Palmer Reservoir	Johnson	37.56 acres	-
17	Muddy Guard Reservoir Number 2	Johnson	36.55 acres	-
18	Sapphire Lake	Johnson	35.09 acres	-
19	Lame Deer Lake	Johnson	33.61 acres	-
20	Horn Creek Reservoir	Johnson	32.63 acres	-
21	Diamond Lake	Johnson	30.56 acres	-
22	South Piney Lakes	Johnson	29.9 acres	-
23	Martin Reservoir	Johnson	29.65 acres	-
24	Upper Frozen Lake	Johnson	28.66 acres	-
25	Pole Creek Irrigation Reservoir	Johnson	27.92 acres	-
26	Pass Reservoir	Johnson	27.18 acres	-
27	Lake Geneva	Johnson	27.16 acres	-
28	Lake Mead	Johnson	26.44 acres	-
29	Willow Glen Reservoir	Johnson	25.88 acres	-
30	Lake McLain	Johnson	17 acres	50 ft
31	Maybelle Lake	Johnson	6 acres	29 ft
32	Powell Lakes	Johnson	5 acres	18 ft
33	Chill Lakes	Johnson	3 acres	8 ft

Sources: Wyoming Game and Fish Department lake data; USGS. Verified October 30, 2026.