Estimate, Median Age by Sex, Total Population (5-year estimate) in Williams County, ND was 31.90000 Years of Age in January of 2022, according to the United States Federal Reserve. Historically, Estimate, Median Age by Sex, Total Population (5-year estimate) in Williams County, ND reached a record high of 40.90000 in January of 2009 and a record low of 31.30000 in January of 2017. Trading Economics provides the current actual value, an historical data chart and related indicators for Estimate, Median Age by Sex, Total Population (5-year estimate) in Williams County, ND - last updated from the United States Federal Reserve on May of 2024.