Lakes / Connecticut / Largest Lakes in Connecticut

Largest Lakes in Connecticut

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 Candlewood	Fairfield	5,127.26 acres	-
2	Barkhamsted Reservoir	Litchfield	2,231.71 acres	-
3	Lake Lillinonah	Litchfield	1,531.02 acres	-
4	Lake Gaillard	New Haven	1,090.97 acres	-
5	Bantam Lake	Litchfield	953.89 acres	-
6	Colebrook River Lake	Litchfield	844.7 acres	-
7	Nepaug Reservoir	Hartford	827.35 acres	-
8	Saugatuck Reservoir	Fairfield	823.11 acres	-
9	Pachaug Pond	New London	817.46 acres	-
10	Lake Zoar	Fairfield	747.66 acres	-
11	Lake Waramaug	Litchfield	652.41 acres	-
12	Washining Lake	Litchfield	565.38 acres	-
13	Shenipsit Lake	Tolland	529.48 acres	-
14	Gardner Lake	New London	526.78 acres	-
15	Pocotopaug Lake	Middlesex	511.28 acres	-
16	Mansfield Hollow Lake	Tolland	488.79 acres	-
17	Easton Reservoir	Fairfield	485.07 acres	-
18	Moodus Reservoir	Middlesex	460.46 acres	-
19	Highland Lake	Litchfield	448.25 acres	-
20	Hemlock Reservoir	Fairfield	419.34 acres	-
21	Lake Saltonstall	New Haven	413.41 acres	-
22	Lake Mc Donough	Litchfield	385.73 acres	-
23	Woodridge Lake	Litchfield	378.07 acres	-
24	Wangumbaug Lake	Tolland	374.36 acres	-
25	Wononskopomuc Lake	Litchfield	348.17 acres	-
26	Upper Shepaug Reservoir	Litchfield	335.34 acres	-
27	Aspinook Pond	New London	308.88 acres	-
28	Broad Brook Reservoir	New Haven	303.69 acres	-
29	Trap Falls Reservoir	Fairfield	300.85 acres	-
30	Mashapaug Pond	Tolland	298 acres	-
31	Lake Quassapaug	New Haven	289.86 acres	-
32	Washinee Lake	Litchfield	287.99 acres	-
33	Lake Konomoc	New London	283.53 acres	-
34	Rogers Lake	New London	279.38 acres	-
35	Middle Pond	Hartford	278.8 acres	-
36	Columbia Lake	Tolland	271.81 acres	-
37	Squantz Pond	Fairfield	271.15 acres	-
38	Williams Pond	New London	270.09 acres	-
39	Margerie Lake Reservoir	Fairfield	260.61 acres	-
40	Laurel Reservoir	Fairfield	258.47 acres	-
41	Bashan Lake	Middlesex	256.9 acres	-
42	Lake Winchester	Litchfield	247.51 acres	-
43	West Hill Pond	Litchfield	245.62 acres	-
44	Lake Hammonasset	Middlesex	243.42 acres	-
45	West Lake Reservoir	Fairfield	243.19 acres	-
46	Deep River Reservoir	New London	235.54 acres	-
47	Groton Reservoir	New London	214.36 acres	-
48	Mudge Pond	Litchfield	213.61 acres	-
49	Tyler Lake	Litchfield	205.5 acres	-
50	Mianus Reservoir	Fairfield	200.9 acres	-
51	West Branch Reservoir	Litchfield	200.76 acres	-
52	Shuttle Meadow Reservoir	Hartford	200.42 acres	-
53	West Thompson Lake	Windham	200.37 acres	-
54	Crystal Lake	Tolland	199.38 acres	-
55	Alexander Lake	Windham	196.55 acres	-
56	Indian Lake	Litchfield	194.3 acres	-
57	Holly Pond	Fairfield	192.78 acres	-
58	North Pond	Litchfield	192.02 acres	-
59	Amston Lake	New London	189.41 acres	-
60	Old Marsh Pond	Hartford	188.9 acres	-
61	Lake Hayward	New London	178.44 acres	-
62	Bolton Lake	Tolland	178.16 acres	-
63	Wangum Lake	Litchfield	177.92 acres	-
64	Witches Woods Lake	Windham	175.61 acres	-
65	Wononpakook Lake	Litchfield	167.54 acres	-
66	Doolittle Lake	Litchfield	167.51 acres	-
67	Ulbrich Reservoir	New Haven	157.49 acres	-
68	Riga Lake	Litchfield	155.92 acres	-
69	Staffordville Reservoir	Tolland	155.81 acres	-
70	South Norwalk Reservoir	Fairfield	154.94 acres	-
71	Pine Acres Lake	Windham	154.58 acres	-
72	Morgan Pond Reservoir	New London	154.15 acres	-
73	Andover Lake	Tolland	152.71 acres	-
74	Rosemond Lake	New London	152.61 acres	-
75	Batterson Park Pond	Hartford	149.74 acres	-
76	Wood Creek Pond	Litchfield	146.26 acres	-
77	Congamond Lakes South Pond	Hartford	144.06 acres	-
78	Crystal Pond	Windham	143.4 acres	-
79	Oxoboxo Lake	New London	143.04 acres	-
80	Morris Reservoir	Litchfield	140.78 acres	-
81	Powers Lake	New London	140.73 acres	-
82	Silver Lake	Hartford	140.6 acres	-
83	Lake Whitney	New Haven	140.36 acres	-
84	South Pond	Litchfield	138.13 acres	-
85	Hartford Reservoir Number 6	Hartford	137.64 acres	-
86	Crystal Lake	Litchfield	137.57 acres	-
87	Pistapaug Pond	Middlesex	136.4 acres	-
88	Cedar Swamp Pond	Hartford	136.35 acres	-
89	Quaddick Reservoir	Windham	132.35 acres	-
90	Red Cedar Lake	New London	130.85 acres	-
91	North Spectacle Pond	Litchfield	127.29 acres	-
92	Taunton Pond	Fairfield	126.69 acres	-
93	Reuben Hart Reservoir	Litchfield	125.5 acres	-
94	Babcock Pond	New London	125.33 acres	-
95	Pattagansett Lake	New London	124.58 acres	-
96	Scovill Reservoir	New Haven	118.36 acres	-
97	Upper Bolton Lake	Tolland	117.2 acres	-
98	Lake Winnemaug	Litchfield	112.79 acres	-
99	Beseck Lake	Middlesex	111.6 acres	-
100	Knowlton Pond	Windham	110.95 acres	-

Showing the top 100 of 363 counted lakes. Search above, or browse by county on the Connecticut 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.