Estimate, Median Age by Sex, Total Population (5-year estimate) in Jerome County, ID was 33.00000 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 Jerome County, ID reached a record high of 33.10000 in January of 2009 and a record low of 31.40000 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 Jerome County, ID - last updated from the United States Federal Reserve on May of 2024.