United States - Population Growth for Least Developed Countries was 2.32723 % Chg. at Annual Rate in January of 2020, according to the United States Federal Reserve. Historically, United States - Population Growth for Least Developed Countries reached a record high of 2.78101 in January of 1992 and a record low of 2.30226 in January of 1960. Trading Economics provides the current actual value, an historical data chart and related indicators for United States - Population Growth for Least Developed Countries - last updated from the United States Federal Reserve on March of 2024.