Flat Rock
Flat Rock is a island in Grays Harbor County, Washington, recorded in the federal Geographic Names Information System as feature 1519643. It sits at 0 metres above sea level.
Federal profile, 2026
Everything below is the federal record for this place, with each value's source named.
| Name | Flat Rock |
|---|---|
| GNIS feature ID | 1519643 |
| Kind of place | Island |
| State | Washington |
| County | Grays Harbor |
| Latitude | 47.37758 |
| Longitude | -124.34463 |
| USGS topographic map | Tunnel Island |
| First recorded | 09/10/1979 |
| Elevationcalculated | 0 mUSGS EPQS point lookup at the primary coordinate |
| Elevation (feet)calculated | 0 ftelevation_m * 3.28084 |
Other islands
Other places in Grays Harbor County
Questions
Where is Flat Rock?
In Grays Harbor County, Washington, at 47.37758, -124.34463. The USGS records it on the Tunnel Island topographic map.
How high is Flat Rock?
0 metres (0 feet), read from the USGS 3D Elevation Program at the recorded coordinate.
What kind of place is Flat Rock?
The U.S. Geological Survey classifies it as a island in the Geographic Names Information System.
Where does this information come from?
The Geographic Names Information System, published by the U.S. Geological Survey, with elevation from the USGS 3D Elevation Program. Both are works of the United States government and are not subject to copyright in the United States.
Method and sources
The name, class, county and coordinates come from the U.S. Geological Survey's Geographic Names Information System, the federal register of place names. Elevation is read from the USGS 3D Elevation Program at the recorded coordinate. Values shown as calculated are arithmetic over those fields and are not separate measurements. Nothing on this page describes what the place is like to visit: no one writing it has been there, and the federal record does not say.
- USGS Geographic Names Information System (GNIS), Domestic Names, 2026
- USGS 3DEP Elevation Point Query Service