Estimate, Median Age by Sex, Total Population (5-year estimate) in Phillips County, CO was 40.60000 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 Phillips County, CO reached a record high of 43.70000 in January of 2015 and a record low of 37.10000 in January of 2019. 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 Phillips County, CO - last updated from the United States Federal Reserve on May of 2024.