United States - Population Growth for Lower Middle Income Countries was 1.37686 % Chg. at Annual Rate in January of 2020, according to the United States Federal Reserve. Historically, United States - Population Growth for Lower Middle Income Countries reached a record high of 2.50672 in January of 1983 and a record low of 1.37686 in January of 2020. Trading Economics provides the current actual value, an historical data chart and related indicators for United States - Population Growth for Lower Middle Income Countries - last updated from the United States Federal Reserve on April of 2024.