Resident Population in Lake County, OR was 8.19400 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Lake County, OR reached a record high of 8.36500 in January of 2022 and a record low of 6.30000 in January of 1974. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Lake County, OR - last updated from the United States Federal Reserve on April of 2026.