Lakes / New York / Putnam County

Lakes in Putnam County, New York

53 lakes counted in Putnam County - the largest is West Branch Reservoir at 1,061 acres.

Lakes Counted

1,061 acres

Largest - West Branch Reservoir

120 ft

Deepest - Lake Gilead

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

All Counted Lakes

#	Lake	County	Surface Area	Max Depth
1	West Branch Reservoir	Putnam	1,061 acres	52 ft
2	Croton Falls Reservoir	Putnam	603 acres	-
3	Lake Mahopac	Putnam	598 acres	-
4	East Branch Reservoir	Putnam	525 acres	62 ft
5	Bog Brook Reservoir	Putnam	404 acres	-
6	Middle Branch Reservoir	Putnam	395 acres	62 ft
7	Oscawana Lake	Putnam	360 acres	-
8	Croton Falls Reservoir	Putnam	280 acres	-
9	West Branch Reservoir	Putnam	277 acres	-
10	Peach Lake	Putnam	245 acres	-
11	Boyd Corners Reservoir	Putnam	230 acres	-
12	Putnam Lake	Putnam	225 acres	-
13	Lake Carmel	Putnam	201 acres	-
14	Lake Gleneida	Putnam	168 acres	108 ft
15	White Pond	Putnam	140 acres	12 ft
16	E Branch Croton Riv Reservoir	Putnam	138 acres	-
17	Kirk Lake	Putnam	131 acres	-
18	Lake Gilead	Putnam	118 acres	120 ft
19	Roaring Brook Lake	Putnam	118 acres	-
20	Wiccopee Reservoir	Putnam	113 acres	-
21	Canopus Lake	Putnam	100 acres	19 ft
22	Sagamore Lake	Putnam	99 acres	-
23	Wawayanda Lake	Putnam	96 acres	-
24	Croton Falls Reservoir	Putnam	92 acres	-
25	Pine Pond	Putnam	81 acres	-
26	Barrett Pond	Putnam	80 acres	-
27	Lake Tonetta	Putnam	73 acres	-
28	Lake Peekskill	Putnam	58 acres	-
29	Seven Hills Lake	Putnam	55 acres	-
30	Stillwater Pond	Putnam	55 acres	30 ft
31	Long Pond	Putnam	53 acres	-
32	Ice Pond	Putnam	52 acres	-
33	Wiccopee Reservoir	Putnam	52 acres	-
34	China Pond	Putnam	51 acres	-
35	Secor Lake	Putnam	49 acres	-
36	Croton Falls Reservoir	Putnam	47 acres	-
37	Indian Lake	Putnam	46 acres	-
38	West Branch Reservoir	Putnam	37 acres	-
39	Lake Tibet	Putnam	37 acres	-
40	Lake Casse	Putnam	36 acres	-
41	Lake Nimham	Putnam	36 acres	-
42	Lost Lake	Putnam	35 acres	-
43	Lake Valhalla	Putnam	34 acres	-
44	Haines Pond	Putnam	34 acres	-
45	Barger Pond	Putnam	30 acres	-
46	Wonder Lake	Putnam	27 acres	-
47	Wixon Pond	Putnam	26 acres	-
48	East Branch Reservoir	Putnam	20 acres	-
49	Pelton Pond	Putnam	9 acres	-
50	East Branch Reservoir	Putnam	8 acres	-
51	Croton Falls Reservoir	Putnam	6 acres	-
52	Middle Branch Reservoir	Putnam	2 acres	-
53	East Branch Reservoir	Putnam	1 acres	-

Sources: New York State DEC lake data; USGS. Verified October 30, 2026.