Lakes / Wisconsin / Waukesha County

Lakes in Waukesha County, Wisconsin

25 lakes counted in Waukesha County - the largest is Pewaukee Lake at 2,437 acres.

Lakes Counted

2,437 acres

Largest - Pewaukee Lake

90 ft

Deepest - Okauchee Lake

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

All Counted Lakes

#	Lake	County	Surface Area	Max Depth
1	Pewaukee Lake	Waukesha	2,437 acres	45 ft
2	Big Muskego Lake	Waukesha	2,194 acres	23 ft
3	Okauchee Lake	Waukesha	1,210 acres	90 ft
4	Lac La Belle	Waukesha	1,154 acres	45 ft
5	Nagawicka Lake	Waukesha	981 acres	90 ft
6	Oconomowoc Lake	Waukesha	818 acres	60 ft
7	Pine Lake	Waukesha	711 acres	85 ft
8	Little Muskego Lake	Waukesha	470 acres	65 ft
9	North Lake	Waukesha	440 acres	78.4 ft
10	Lower Phantom Lake	Waukesha	373 acres	12 ft
11	Beaver Lake	Waukesha	313 acres	46 ft
12	Golden Lake	Waukesha, Jefferson	288 acres	44 ft
13	Eagle Spring Lake	Waukesha, Walworth	279 acres	8 ft
14	Upper Nemahbin Lake	Waukesha	277 acres	60 ft
15	Lower Nemahbin Lake	Waukesha	239 acres	36 ft
16	Lake Keesus	Waukesha	235 acres	42 ft
17	Silver Lake	Waukesha	217 acres	40 ft
18	Lake Denoon	Racine, Waukesha	167 acres	55 ft
19	Upper Nashotah Lake	Waukesha	131 acres	53 ft
20	School Section Lake	Waukesha	122 acres	8 ft
21	Phantom Lake	Waukesha	110 acres	29 ft
22	Spring Lake	Waukesha	105 acres	22 ft
23	Bass Bay Lake	Waukesha	104 acres	23 ft
24	Lake Five	Waukesha, Washington	104 acres	23 ft
25	Beaver Dam Lake	Waukesha	36 acres	6 ft

Sources: Wisconsin DNR lake data; USGS. Verified October 28, 2026.