Estimate, Median Age by Sex, Total Population (5-year estimate) in Rockingham County, NH was 44.70000 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 Rockingham County, NH reached a record high of 44.70000 in January of 2020 and a record low of 40.50000 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 Rockingham County, NH - last updated from the United States Federal Reserve on May of 2024.