Resident Population in Sherman County, OR was 2.00200 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Sherman County, OR reached a record high of 2.20100 in January of 1984 and a record low of 1.66300 in January of 2005. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Sherman County, OR - last updated from the United States Federal Reserve on April of 2026.