Population Estimate, Total, Not Hispanic or Latino, White Alone (5-year estimate) in Sullivan County, IN was 18895.00000 Persons in January of 2022, according to the United States Federal Reserve. Historically, Population Estimate, Total, Not Hispanic or Latino, White Alone (5-year estimate) in Sullivan County, IN reached a record high of 20263.00000 in January of 2010 and a record low of 18864.00000 in January of 2020. Trading Economics provides the current actual value, an historical data chart and related indicators for Population Estimate, Total, Not Hispanic or Latino, White Alone (5-year estimate) in Sullivan County, IN - last updated from the United States Federal Reserve on May of 2024.