Population Ages 0 to 14 for the United States was 18.37175 % of Total in January of 2020, according to the United States Federal Reserve. Historically, Population Ages 0 to 14 for the United States reached a record high of 30.80259 in January of 1961 and a record low of 18.37175 in January of 2020. Trading Economics provides the current actual value, an historical data chart and related indicators for Population Ages 0 to 14 for the United States - last updated from the United States Federal Reserve on April of 2024.