Working Age Population: Aged 15 and Over: All for the United States was 261445166.66667 Persons in January of 2021, according to the United States Federal Reserve. Historically, Working Age Population: Aged 15 and Over: All for the United States reached a record high of 261445166.66667 in January of 2021 and a record low of 117244916.66667 in January of 1960. Trading Economics provides the current actual value, an historical data chart and related indicators for Working Age Population: Aged 15 and Over: All for the United States - last updated from the United States Federal Reserve on March of 2024.