United States - Population Ages 0 to 14 for World was 25.48192 % of Total in January of 2020, according to the United States Federal Reserve. Historically, United States - Population Ages 0 to 14 for World reached a record high of 38.00734 in January of 1966 and a record low of 25.48192 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 World - last updated from the United States Federal Reserve on March of 2024.