Lakes / Utah / Sevier County / Koosharem Reservoir
Koosharem Reservoir, Utah
345.7 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Utah
38.60 degrees N, 111.84 degrees W - Sevier 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 Koosharem Reservoir Stacks Up
- Larger than 79% of the 298 lakes counted in Utah.
- About 113 miles from Provo, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Boobe Hole Reservoir | Sevier | 5.7 mi | 26.44 acres |
| Big Lake | Sevier | 7.3 mi | 55.85 acres |
| Fish Lake | Sevier | 8.0 mi | 2,581.51 acres |
| Annabella Reservoir | Sevier | 9.3 mi | 26.19 acres |
| Crater Lakes | Sevier | 10 mi | 83.27 acres |
| Johnson Valley Reservoir | Sevier | 11 mi | 684.98 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Koosharem Reservoir
How Big Is Koosharem Reservoir?
Koosharem Reservoir covers 345.7 acres in Sevier County, Utah.
What Is the Largest Lake in Sevier County?
Fish Lake is the largest lake in Sevier County, at 2,581.51 acres.
Largest Lakes in Utah
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Great Salt Lake | Box Elder | 925,981.5 acres | - |
| 2 | Lake Powell | Kane | 128,544.01 acres | - |
| 3 | Sevier Lake | Millard | 122,527.82 acres | - |
| 4 | Utah Lake | Utah | 91,155.46 acres | - |
| 5 | Bear Lake | Rich | 70,008.54 acres | - |
All 298 Utah lakes ranked by surface area
Sources: USGS National Hydrography Dataset (The National Map) lake data (ID 78928117). Verified October 30, 2026.