Grays River is a census-designated place (CDP) in Wahkiakum County, Washington. Grays River stands on the north bank of the lower Grays River, which flows into the Columbia River Estuary. As of the 2020 census, Grays River had a population of 248. The Grays River community is part of the Naselle-Grays River Valley School District, a K-12 school district of about 670 students.