Working Age Population: Aged 15-64: All for the United States was 209334081.06040 Persons in December of 2023, according to the United States Federal Reserve. Historically, Working Age Population: Aged 15-64: All for the United States reached a record high of 209334081.06040 in December of 2023 and a record low of 135145847.09944 in January of 1977. Trading Economics provides the current actual value, an historical data chart and related indicators for Working Age Population: Aged 15-64: All for the United States - last updated from the United States Federal Reserve on March of 2024.