Resident Population in Grays Harbor County, WA was 77.29000 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Grays Harbor County, WA reached a record high of 77.29000 in January of 2023 and a record low of 59.50000 in January of 1971. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Grays Harbor County, WA - last updated from the United States Federal Reserve on May of 2024.