Lakes / Oklahoma / Osage County / Keystone Lake
Keystone Lake, Oklahoma
22,970.19 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Oklahoma
36.23 degrees N, 96.33 degrees W - Osage County. State and county outlines drawn from Census boundary data; the lake marker is placed by its USGS National Hydrography Dataset coordinates, not by eye. Schematic - not a survey map.
How Keystone Lake Stacks Up
- Ranks #6 for surface area among the Oklahoma lakes counted so far - 22,970.19 acres.
- The largest lake in Osage County among those counted.
- About 20 miles from Tulsa, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Shell Lake | Osage | 8.8 mi | 557.96 acres |
| Mannford Reservoir | Creek | 9.8 mi | 295.64 acres |
| Skiatook Lake | Osage | 13 mi | 10,410.2 acres |
| Hominy Municipal Lake | Osage | 13 mi | 190.77 acres |
| Cleveland Reservoir | Pawnee | 15 mi | 168.81 acres |
| Lake Hominy | Osage | 16 mi | 28.42 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Keystone Lake
How Big Is Keystone Lake?
Keystone Lake covers 22,970.19 acres in Osage County, Oklahoma.
What Is the Largest Lake in Osage County?
Keystone Lake is the largest lake in Osage County, at 22,970.19 acres.
Largest Lakes in Oklahoma
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Eufaula Lake | Pittsburg | 100,734.12 acres | - |
| 2 | Lake Texoma | Marshall | 59,414.43 acres | - |
| 3 | Grand Lake O' The Cherokees | Delaware | 38,902.36 acres | - |
| 4 | Robert S Kerr Reservoir | Haskell | 35,795.91 acres | - |
| 5 | Oologah Lake | Rogers | 29,728.7 acres | - |
All 376 Oklahoma lakes ranked by surface area
Sources: USGS National Hydrography Dataset (The National Map) lake data (ID 130268317). Verified October 30, 2026.