United States - Population Ages 0 to 14 for Lower Middle Income Countries was 29.63394 % of Total in January of 2020, according to the United States Federal Reserve. Historically, United States - Population Ages 0 to 14 for Lower Middle Income Countries reached a record high of 42.10248 in January of 1967 and a record low of 29.63394 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 Lower Middle Income Countries - last updated from the United States Federal Reserve on March of 2024.