| Grotto, Washington | |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | Washington#USA |
| Pushpin Label: | Grotto |
| Pushpin Map Caption: | Location in Washington and the United States |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Washington |
| Subdivision Type2: | County |
| Subdivision Name2: | King |
| Unit Pref: | Imperial |
| Population As Of: | 2000 |
| Population Density Km2: | auto |
| Timezone: | Pacific (PST) |
| Utc Offset: | -8 |
| Timezone Dst: | PDT |
| Utc Offset Dst: | -7 |
| Coordinates: | 47.7364°N -121.4219°W |
| Postal Code Type: | ZIP codes |
| Blank Name: | FIPS code |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 1520375[1] |
Grotto is a small unincorporated community in King County, Washington, United States. It is located on U.S. Route 2 west of Stevens Pass in the Cascade Mountains, near the town of Skykomish. Grotto is known for its scenic mountain environment.
A post office called Grotto was established in 1910.[2] The community was named for gorges near the original town site.[3]