Estimate, Median Age by Sex, Total Population (5-year estimate) in Fresno County, CA was 33.20000 Years of Age in January of 2023, according to the United States Federal Reserve. Historically, Estimate, Median Age by Sex, Total Population (5-year estimate) in Fresno County, CA reached a record high of 33.20000 in January of 2023 and a record low of 30.30000 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 Fresno County, CA - last updated from the United States Federal Reserve on September of 2025.