Resident Population in Williams County, ND was 39.11300 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Williams County, ND reached a record high of 41.18400 in January of 2020 and a record low of 18.70000 in January of 1973. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Williams County, ND - last updated from the United States Federal Reserve on May of 2024.