Lakes / Montana / Lake Koocanusa
Lake Koocanusa, Montana
28,723 acres
Surface Area
2,397.68 ft
Surface Elevation
Where It Sits, and How Deep It Goes
Locator - Montana
48.73 degrees N, 115.24 degrees W - Lincoln County. State and county outlines drawn from Census boundary data; the lake marker is placed by its Montana Fish, Wildlife & Parks coordinates, not by eye. Schematic - not a survey map.
How Lake Koocanusa Stacks Up
- Ranks #4 for surface area among the Montana lakes counted so far - 28,723 acres.
- The largest lake in Lincoln County among those counted.
- About 56 miles from Kalispell, as the crow flies.
- 19 fish species on the FWP list for this lake.
Fish Species
Brook TroutBull TroutBurbotKokaneeLargemouth BassLargescale SuckerLongnose DaceLongnose SuckerMountain WhitefishNorthern PikeNorthern Pike MinnowPeamouthPumpkinseedRainbow TroutRainbow X Cutthroat TroutRedside ShinerSmallmouth BassWestslope Cutthroat TroutYellow Perch
Species recorded for this lake. Presence only - no abundance ratings.
Facts and Figures
Waterbody ID60176128
CountyLincoln
Coordinates48.7257, -115.2436
Largest Lakes in Montana
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Fort Peck Lake | Valley | 233,053 acres | - |
| 2 | Flathead Lake | Lake | 122,132 acres | About 380 ft |
| 3 | Canyon Ferry Lake | Broadwater | 32,773 acres | About 170 ft |
| 4 | Lake Koocanusa | Lincoln | 28,723 acres | - |
| 5 | Hungry Horse Reservoir | Flathead | 23,577 acres | - |
Sources: Montana Fish, Wildlife & Parks lake data (ID 60176128). Verified October 30, 2026.