Lakes in Middlesex County, Connecticut

33 lakes counted in Middlesex County - the largest is Pocotopaug Lake at 511.28 acres.

Lakes Counted

511.28 acres

Largest - Pocotopaug Lake

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

All Counted Lakes

#	Lake	County	Surface Area	Max Depth
1	Pocotopaug Lake	Middlesex	511.28 acres	-
2	Moodus Reservoir	Middlesex	460.46 acres	-
3	Bashan Lake	Middlesex	256.9 acres	-
4	Lake Hammonasset	Middlesex	243.42 acres	-
5	Pistapaug Pond	Middlesex	136.4 acres	-
6	Beseck Lake	Middlesex	111.6 acres	-
7	Mount Higby Reservoir	Middlesex	88.26 acres	-
8	Killingworth Reservoir	Middlesex	80.06 acres	-
9	Messerschmidt Pond	Middlesex	79.18 acres	-
10	Great Hill Pond	Middlesex	74.08 acres	-
11	Cedar Lake	Middlesex	72.01 acres	-
12	Laurel Brook Reservoir	Middlesex	69.04 acres	-
13	Chapman Pond	Middlesex	54.08 acres	-
14	Turkey Hill Reservoir	Middlesex	52.14 acres	-
15	Pattaconk Reservoir	Middlesex	50.82 acres	-
16	Mill Pond	Middlesex	48.6 acres	-
17	Worthington Pond	Middlesex	48.13 acres	-
18	Waterhouse Pond	Middlesex	47.43 acres	-
19	Bushy Hill Pond	Middlesex	45.1 acres	-
20	Jobs Pond	Middlesex	43.24 acres	-
21	Chapmans Pond	Middlesex	37.92 acres	-
22	Hidden Lake	Middlesex	37.81 acres	-
23	Foster Pond	Middlesex	36.62 acres	-
24	Deer Lake	Middlesex	36.22 acres	-
25	Black Pond	Middlesex	35.81 acres	-
26	Portland Reservoir	Middlesex	31.66 acres	-
27	Millers Pond	Middlesex	31.36 acres	-
28	Crystal Lake	Middlesex	31.19 acres	-
29	Tower Hill Lake	Middlesex	28.33 acres	-
30	Pecausett Pond	Middlesex	27.84 acres	-
31	Adder Reservoir	Middlesex	27.77 acres	-
32	Higganum Reservoir	Middlesex	26.44 acres	-
33	Dooley Pond	Middlesex	25.32 acres	-

Sources: USGS National Hydrography Dataset lake data; USGS. Verified October 30, 2026.