Population Estimate, Total, Hispanic or Latino (5-year estimate) in Gilliam County, OR was 166.00000 Persons in January of 2022, according to the United States Federal Reserve. Historically, Population Estimate, Total, Hispanic or Latino (5-year estimate) in Gilliam County, OR reached a record high of 186.00000 in January of 2016 and a record low of 85.00000 in January of 2020. Trading Economics provides the current actual value, an historical data chart and related indicators for Population Estimate, Total, Hispanic or Latino (5-year estimate) in Gilliam County, OR - last updated from the United States Federal Reserve on May of 2024.