Grays River is a census-designated place (CDP) in Wahkiakum County, Washington.

Grays River has a subtropical Mediterranean climate (Köppen Csb).

Being that Grays River is located only 23 miles (37 km) from the coast and there are no significant hills or mountains between it and the coast, Grays River receives a great deal of precipitation.

Measurable precipitation falls on Grays River an average of 192 days a year.

[6] The ancestry of Grays River was 14.5% English, 6.6% Irish, 3.5% German, and 2.6% Norwegian.

There were 128 housing units at an average density of 6.34 per square mile (2.45/km2).

20.9% of all households were made up of individuals, and 13.6% had someone living alone who was 65 years of age or older.