| name | geology | archipelago | Area (m²) | latitude (°) | Length (m) | waterbody | longitude (°) | population (people) | country | Map |
|---|---|---|---|---|---|---|---|---|---|---|
| Cypress Island | San Juan Islands | 22,273,900 | 48.5666656494 | 7,640 | -122.6999969482 | 40 | United States | Map | ||
| Lummi Island | San Juan Islands | 23,970,000 | 48.6833343506 | -122.6666641235 | 822 | United States | Map | |||
| Orcas Island | San Juan Islands | 148,406,000 | 48.6500015259 | Strait of Juan de Fuca | -122.9333343506 | 4,453 | United States | Map | ||
| San Juan Island | San Juan Islands | 142,587,008 | 48.5333328247 | Strait of Juan de Fuca | -123.0833358765 | 6,822 | United States | Map | ||
| Stuart Island (Washington) | San Juan Islands | 7,462,000 | 48.6666679382 | -123.1999969482 | 200 | United States | Map |