Lakes / Pennsylvania / Largest Lakes in Pennsylvania

Largest Lakes in Pennsylvania

Ranked by surface area, from Pennsylvania Fish and Boat Commission 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	Pymatuning Reservoir	Crawford	13,920 acres	About 25 ft
2	Allegheny Reservoir	Warren	12,081 acres	128 ft
3	Raystown Lake	Huntingdon	8,297 acres	None
4	Lake Wallenpaupack	Pike, Wayne	5,698 acres	60 ft
5	Shenango River Lake	Mercer	3,559 acres	30 ft
6	Presque Isle Bay	Erie	3,302 acres	None
7	Lake Arthur (Moraine State Park)	Butler	3,224 acres	About 30 ft
8	Youghiogheny River Lake	Fayette	2,840 acres	None
9	Lake Wilhelm	Mercer	1,739 acres	About 22 ft
10	Foster Joseph Sayers Lake	Centre	1,729 acres	About 44 ft
11	Glendale Lake	Cambria	1,600 acres	About 40 ft
12	Nockamixon Lake (State Park)	Bucks	1,450 acres	About 80 ft
13	Lake Marburg (Codorus State Park)	York	1,275 acres	About 100 ft
14	East Branch Clarion River Lake	Elk	1,161 acres	About 140 ft
15	Blue Marsh Reservoir	Berks	1,150 acres	52 ft
16	Shohola Marsh Reservoir	Pike	1,134 acres	None
17	Beaver Run Reservoir	Westmoreland	1,125 acres	None
18	Cowanesque Lake	Tioga	1,090 acres	None
19	Ontelaunee Lake	Berks	1,082 acres	None
20	Keystone Lake	Armstrong	950 acres	None
21	Beltzville Lake	Carbon	946 acres	About 130 ft
22	Conneaut Lake	Crawford	929 acres	None
23	Quemahoning Reservoir	Somerset	899 acres	None
24	Green Lane Reservoir	Montgomery	814 acres	None
25	Conneaut Marsh	Crawford	722.1 acres	None
26	Yellow Creek Lake (State Park)	Indiana	720 acres	About 30 ft
27	Piney Reservoir	Clarion	690 acres	None
28	Chester Octoraro Reservoir	Lancaster	669 acres	None
29	Harveys Lake	Luzerne	658 acres	None
30	Hammond Lake	Tioga	640 acres	None
31	Conemaugh River Lake	Indiana	640 acres	None
32	Tamarack Swamp	Warren	615.5 acres	None
33	DeHart Reservoir	Dauphin	596.3 acres	None
34	Tionesta Lake	Forest	570 acres	46 ft
35	Tamarack Lake	Crawford	562 acres	None
36	Curwensville Lake	Clearfield	540 acres	None
37	Marsh Creek Lake (State Park)	Chester	535 acres	About 75 ft
38	Pocono Lake	Monroe	526 acres	None
39	Indian Lake	Somerset	497.2 acres	None
40	Crystal Lake	Luzerne	490 acres	None
41	Loyalhanna Lake	Westmoreland	479 acres	None
42	Tioga Reservoir	Tioga	470 acres	None
43	Shawnee Lake (State Park)	Bedford	451 acres	About 28 ft
44	Promised Land Lake (Upper Promised Land Lake)	Pike	422 acres	About 14 ft
45	Ambridge Reservoir	Beaver	405.6 acres	None
46	Huntsville Reservoir	Luzerne	402.3 acres	None
47	Pikes Creek Reservoir	Luzerne	400 acres	None
48	Springton Reservoir	Delaware	391 acres	None
49	Rose Valley Lake	Lycoming	389 acres	None
50	Lake Galena	Bucks	365 acres	None
51	Middle Creek Reservoir	Lancaster	361 acres	None
52	Beaverdam Run Reservoir	Cambria	360 acres	None
53	Crooked Creek Lake	Armstrong	350 acres	None
54	Pinchot Lake (State Park)	York	340 acres	About 30 ft
55	Still Creek Reservoir	Schuylkill	338.3 acres	None
56	High Point Lake	Somerset	338 acres	None
57	Mauch Chunk Lake	Carbon	330 acres	None
58	Woodcock Creek Lake	Crawford	325 acres	None
59	Stillwater Lake	Monroe	320 acres	None
60	Lake Henry	Wayne	311.6 acres	None
61	Wild Creek Reservoir	Carbon	306 acres	None
62	Pecks Pond	Pike	300 acres	None
63	Balsam Swamp	Pike	291.1 acres	None
64	Treasure Lake	Clearfield	290.6 acres	None
65	Lake Redman	York	290 acres	None
66	Twin Lakes	Pike	285.4 acres	None
67	Lake Hauto	Schuylkill	280.2 acres	None
68	Prompton Dam	Wayne	280 acres	About 35 ft
69	Mahoning Creek Lake	Indiana	279 acres	None
70	Lake Meade	Adams	273.3 acres	None
71	Lake Ladore	Wayne	264.6 acres	None
72	Lake Carey	Wyoming	262 acres	None
73	Lake Latonka	Mercer	260 acres	None
74	Somerset Lake **DRAWDOWN STATUS	Somerset	253 acres	None
75	Paupackan Lake	Wayne	252 acres	None
76	Kahle Lake Temporarily lifted	Clarion	251 acres	None
77	Gouldsboro Lake	Monroe	250 acres	About 8 ft
78	Black Moshannon Lake	Centre	250 acres	About 12 ft
79	Howard Eaton Reservoir	Erie	246 acres	None
80	Lake Jean	Luzerne	245 acres	About 14 ft
81	Cross Creek Lake	Washington	244 acres	None
82	Lake Naomi	Monroe	240.4 acres	None
83	Edinboro Lake	Erie	240 acres	None
84	Lake Ariel	Wayne	239.4 acres	None
85	Walker Lake	Snyder	239 acres	None
86	Porters Lake	Pike	238.5 acres	None
87	Koon Lake	Bedford	233 acres	None
88	Bradys Lake	Monroe	229 acres	None
89	Duck Harbor Pond	Wayne	228 acres	None
90	Long Arm Dam	York	225 acres	None
91	Arrowhead Lake	Monroe	223 acres	None
92	Lake Williams (lake drained)	York	220 acres	None
93	Black Bear Swamp	Monroe	218.9 acres	None
94	Westcolang Pond	Pike	204.7 acres	None
95	Meadow Grounds Lake	Fulton	204 acres	None
96	Glade Dam Lake	Butler	200 acres	None
97	Cranberry Swamp	Mercer	198.7 acres	None
98	Roaming Woods Lake	Wayne	198.2 acres	None
99	Lackawanna Lake (State Park)	Lackawanna	198 acres	About 30 ft
100	Lake Winola	Wyoming	198 acres	None

Showing the top 100 of 743 counted lakes. Search above, or browse by county on the Pennsylvania page, for the full inventory.

Source: Pennsylvania Fish and Boat Commission lake data. Verified October 28, 2026. New lakes are added as their records are verified - rankings update with every addition.