Resident Population in Traill County, ND was 7.90800 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Traill County, ND reached a record high of 9.70000 in January of 1977 and a record low of 7.85600 in January of 2009. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Traill County, ND - last updated from the United States Federal Reserve on May of 2024.