Estimate, Median Age by Sex, Total Population (5-year estimate) in Grand Forks County, ND was 30.30000 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 Grand Forks County, ND reached a record high of 30.30000 in January of 2022 and a record low of 26.60000 in January of 2009. 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 Grand Forks County, ND - last updated from the United States Federal Reserve on May of 2024.