Grays Harbor

General data
- Name: Grays Harbor
- Water system: Pacific Ocean
- Water type: Estuary
- Progression: Pacific Ocean -> Planet Earth
- Climates: Temperate
- Continents: North America
- Countries: United States of America
Description
Grays Harbor is an estuarine bay located 45 miles (72 km) north of the mouth of the Columbia River, on the southwest Pacific coast of Washington state, in the United States. It is a ria, which formed at the end of the last ice age, when sea levels flooded the Chehalis River.