United States - Population Ages 0 to 14 for Middle Income Countries was 25.52820 % of Total in January of 2020, according to the United States Federal Reserve. Historically, United States - Population Ages 0 to 14 for Middle Income Countries reached a record high of 40.99208 in January of 1966 and a record low of 25.52820 in January of 2020. Trading Economics provides the current actual value, an historical data chart and related indicators for United States - Population Ages 0 to 14 for Middle Income Countries - last updated from the United States Federal Reserve on April of 2024.