Estimate, Median Age by Sex, Total Population (5-year estimate) in San Juan County, CO was 49.30000 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 San Juan County, CO reached a record high of 52.10000 in January of 2018 and a record low of 37.90000 in January of 2012. 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 San Juan County, CO - last updated from the United States Federal Reserve on May of 2024.