United States - Literacy Rate, Adult Total for Least Developed Countries was 67.71457 % of People Ages 15 and Above in January of 2023, according to the United States Federal Reserve. Historically, United States - Literacy Rate, Adult Total for Least Developed Countries reached a record high of 67.71457 in January of 2023 and a record low of 40.17880 in January of 1981. Trading Economics provides the current actual value, an historical data chart and related indicators for United States - Literacy Rate, Adult Total for Least Developed Countries - last updated from the United States Federal Reserve on February of 2026.