Two canoes crossing open water between forested points in the Boundary Waters

Updated August 2026

Biggest Lake in Oklahoma: Eufaula Lake (102,500 acres)

Eufaula Lake is Oklahoma's largest lake per the Oklahoma Department of Wildlife Conservation (ODWC) fish management survey report; figure matches USACE Tulsa District. Below: 50 Oklahoma lakes ranked by surface area.

The largest lake in Oklahoma is Eufaula Lake at 102,500 acres , in McIntosh, Pittsburg, Haskell and Okmulgee counties County, according to the Oklahoma Department of Wildlife Conservation (ODWC) fish management survey report; figure matches USACE Tulsa District.

Eufaula Lake isn't in our water-quality index — we grade lakes with enough EPA Water Quality Portal samples to score, which leaves out many large reservoirs and border waters. The ranking below covers the 50 Oklahoma lakes we do grade, led by Oologah Lake.

Source: Oklahoma Department of Wildlife Conservation (ODWC) fish management survey report; figure matches USACE Tulsa District (2026-07-30). The table below ranks the Oklahoma lakes in our own index by surface area.

Lakes with area data

29,729

Largest (acres)

5,289

Median of top 50

42/50

Reservoirs (vs natural)

Reading Oklahoma's size profile

Oklahoma's largest lake by surface area is Oologah Lake in Rogers County, spanning 29,729 acres. Most of Oklahoma's biggest waters are reservoirs — dammed river valleys built for water supply, flood control, and recreation, so their footprints shift with pool level.

Surface area is a poor proxy for water quality on its own — a large lake can hold a clean, deep core and a nutrient-loaded bay at the same time. Each lake below links to its full report card with grade, clarity, depth, and EPA impairment status. Area figures come from state DNR surveys and the USACE National Inventory of Dams; grades come from EPA and state monitoring data.

The 50 biggest lakes in Oklahoma by surface area

#	Lake	County	Surface area	Max depth	Grade
1	Oologah Lake	Rogers	29,729 acres	-	NR
2	Eufaula Lake	McIntosh	23,385 acres	-	NR
3	Broken Bow Lake	McCurtain	20,500 acres	-	NR
4	Fort Gibson Lake	Wagoner	19,900 acres	-	NR
5	Kaw Lake	Kay	16,750 acres	-	NR
6	Sandy Beach Lake	Osage	16,750 acres	-	D
7	Sardis Lake	Pushmataha	13,610 acres	-	NR
8	Mcgee Creek Reservoir	Atoka	13,524 acres	-	NR
9	Hugo Lake	Choctaw	13,144 acres	-	NR
10	Foss Reservoir	Custer	13,141 acres	-	NR
11	Keystone Lake	Pawnee	13,010 acres	-	NR
12	Tenkiller Ferry Lake	Sequoyah	12,900 acres	-	NR
13	Lake Hudson	Mayes	11,000 acres	-	NR
14	Skiatook Lake	Osage	10,540 acres	-	NR
15	Waurika Lake	Jefferson	10,100 acres	-	NR
16	Tom Steed Reservoir	Kiowa	9,600 acres	-	NR
17	Webbers Falls Reservoir	Muskogee	8,985 acres	-	NR
18	Great Salt Plains Lake	Alfalfa	8,690 acres	-	NR
19	Canton Lake	Blaine	7,910 acres	-	NR
20	Wister Lake	Le Flore	6,745 acres	-	NR
21	Altus Reservoir	Greer	6,260 acres	-	NR
22	Lake Thunderbird	Cleveland	6,070 acres	-	D
23	Fort Cobb Reservoir	Caddo	5,882 acres	-	NR
24	Lake Murray	Carter	5,728 acres	-	NR
25	Sooner Reservoir	Pawnee	5,400 acres	-	NR
26	Atoka Reservoir	Atoka	5,289 acres	-	NR
27	Lake Ellsworth	Comanche	5,220 acres	-	NR
28	Atoka Lake	Atoka	4,980 acres	-	NR
29	Copan Lake	Washington	4,850 acres	-	D
30	Pine Creek Lake	McCurtain	3,750 acres	-	NR
31	Hulah Lake	Osage	3,570 acres	-	NR
32	Lake Carl Blackwell	Payne	3,370 acres	-	NR
33	Arbuckle Reservoir	Murray	3,127 acres	-	NR
34	Hefner Lake	Oklahoma	3,110 acres	-	NR
35	Lake Stanley Draper	Cleveland	2,900 acres	-	NR
36	Lake O the Cherokees	Delaware	2,874 acres	-	NR
37	Eucha Lake	Delaware	2,860 acres	-	D
38	Lake Eucha	Delaware	2,748 acres	-	NR
39	Lake Lawtonka	Comanche	2,286 acres	-	NR
40	Fort Supply Lake	Woodward	1,820 acres	-	NR
41	Arcadia Lake	Oklahoma	1,820 acres	-	NR
42	Spavinaw Lake	Mayes	1,584 acres	-	D
43	Lake Mcalester	Pittsburg	1,521 acres	-	NR
44	Lake Overholser	Canadian	1,500 acres	-	NR
45	Fuqua Lake	Stephens	1,500 acres	-	NR
46	Lake Fuqua	Stephens	1,352 acres	-	NR
47	Lake Konawa	Seminole	1,350 acres	-	D
48	Lake Ponca	Kay	1,159 acres	-	NR
49	Lake Mcmurtry	Noble	1,155 acres	-	NR
50	Birch Lake	Osage	1,145 acres	-	NR

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Frequently Asked Questions

What is the largest lake in Oklahoma?

Eufaula Lake, at 102,500 acres, in McIntosh, Pittsburg, Haskell and Okmulgee counties County. Source: Oklahoma Department of Wildlife Conservation (ODWC) fish management survey report; figure matches USACE Tulsa District, 2026-07-30.

How is lake surface area measured?

Surface area comes from state DNR lake surveys and, for reservoirs, US Army Corps of Engineers (USACE) National Inventory of Dams records. Area is reported in acres at normal pool level. Reservoirs rise and fall with management and drought, so their listed area is the long-term normal rather than a single-day reading.

Are Oklahoma's largest lakes natural or reservoirs?

Of the top 50 Oklahoma lakes by area, 42 sit on a dammed river (reservoirs) and 8 are natural basins. Glacial states (MN, WI, MI, NY) skew natural; plains and southern states (MO, IA, ND, OH) skew toward reservoirs built for water supply, flood control, and recreation.

Do larger lakes have better water quality?

Not reliably. Quality varies more within a big lake than between lakes — a large lake can have a clean, deep main basin and a murky, algae-prone bay fed by a tributary, so one grade can mask wide swings. Depth, watershed land use, and how fast the lake flushes matter far more than raw surface area.

How big is the typical Oklahoma lake in this ranking?

Across the top 50 Oklahoma lakes by surface area, the median is 5,289 acres (Atoka Reservoir). This list is biased toward the biggest waters; the typical Oklahoma lake is far smaller.

Where to stay near Oklahoma's largest lakes

Planning a trip? Jump to live cabin, resort, and hotel availability near Oklahoma's biggest lakes.

Deepest lakes in Oklahoma →Cleanest lakes in Oklahoma →Largest lakes (all states) →All Oklahoma lakes →