Lakes / Indiana / Fulton County / Rock Lake
Rock Lake, Indiana
56.98 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Indiana
41.04 degrees N, 85.98 degrees W - Fulton 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 Rock Lake Stacks Up
- Larger than 45% of the 425 lakes counted in Indiana.
- About 44 miles from Fort Wayne, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Mud Lake | Fulton | 0.8 mi | 30.51 acres |
| Loon Lake | Kosciusko | 2.9 mi | 44.6 acres |
| McClures Lake | Kosciusko | 3.0 mi | 33.13 acres |
| Beaver Dam Lake | Kosciusko | 3.5 mi | 154.69 acres |
| Yellow Creek Lake | Kosciusko | 4.5 mi | 155.08 acres |
| McColley Lake | Wabash | 4.8 mi | 28.2 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Rock Lake
How Big Is Rock Lake?
Rock Lake covers 56.98 acres in Fulton County, Indiana.
What Is the Largest Lake in Fulton County?
Colonial Pond is the largest lake in Fulton County, at 809.9 acres.
Largest Lakes in Indiana
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Monroe Lake | Monroe | 11,112.45 acres | - |
| 2 | Patoka Lake | Orange | 9,120.83 acres | - |
| 3 | Brookville Lake | Franklin | 4,364.22 acres | - |
| 4 | Lake Wawasee | Kosciusko | 3,426.28 acres | - |
| 5 | Broad Pond | Gibson | 2,941.52 acres | - |
All 425 Indiana lakes ranked by surface area
Sources: USGS National Hydrography Dataset (The National Map) lake data (ID 155352552). Verified October 30, 2026.