Lakes / Missouri / St. Francois County / Iron Mountain Lake
Iron Mountain Lake, Missouri
76.6 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Missouri
37.69 degrees N, 90.62 degrees W - St. Francois 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 Iron Mountain Lake Stacks Up
- Larger than 64% of the 352 lakes counted in Missouri.
- About 69 miles from St. Louis, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Ozark Ore Company Lake | St. Francois | 2.9 mi | 214.49 acres |
| Pilot Knob Lake | St. Francois | 3.2 mi | 163.09 acres |
| Snow Hollow Lake | Iron | 5.7 mi | 30.39 acres |
| Lake Killarney | Iron | 7.2 mi | 61.04 acres |
| Asarco Lake | Iron | 14 mi | 25.21 acres |
| Lac Marseilles | St. Francois | 14 mi | 47.44 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Iron Mountain Lake
How Big Is Iron Mountain Lake?
Iron Mountain Lake covers 76.6 acres in St. Francois County, Missouri.
What Is the Largest Lake in St. Francois County?
Goose Creek Lake is the largest lake in St. Francois County, at 315.06 acres.
Largest Lakes in Missouri
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Lake of the Ozarks | Camden | 51,171.75 acres | - |
| 2 | Harry S Truman Reservoir | Benton | 49,365.93 acres | - |
| 3 | Table Rock Lake | Stone | 41,777.86 acres | - |
| 4 | Stockton Lake | Cedar | 24,962.34 acres | - |
| 5 | Mark Twain Lake | Ralls | 18,362.33 acres | - |
All 352 Missouri lakes ranked by surface area
Sources: USGS National Hydrography Dataset (The National Map) lake data (ID 42901819). Verified October 30, 2026.