United States - Population ages 65 and above for Least Developed Countries was 3.59013 % of Total in January of 2020, according to the United States Federal Reserve. Historically, United States - Population ages 65 and above for Least Developed Countries reached a record high of 3.59013 in January of 2020 and a record low of 2.86924 in January of 1959. Trading Economics provides the current actual value, an historical data chart and related indicators for United States - Population ages 65 and above for Least Developed Countries - last updated from the United States Federal Reserve on March of 2024.