Resident Population in Tillamook County, OR was 27.41700 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Tillamook County, OR reached a record high of 27.80000 in January of 2021 and a record low of 18.03400 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Tillamook County, OR - last updated from the United States Federal Reserve on May of 2024.