Working Age Population: Aged 15-74: All for the United States was 241083331.56622 Persons in January of 2022, according to the United States Federal Reserve. Historically, Working Age Population: Aged 15-74: All for the United States reached a record high of 241083331.56622 in January of 2022 and a record low of 160133194.26110 in January of 1981. Trading Economics provides the current actual value, an historical data chart and related indicators for Working Age Population: Aged 15-74: All for the United States - last updated from the United States Federal Reserve on March of 2024.