United States - Population Ages 15 to 64 for St. Lucia was 71.75143 % of Total in January of 2020, according to the United States Federal Reserve. Historically, United States - Population Ages 15 to 64 for St. Lucia reached a record high of 71.75393 in January of 2019 and a record low of 45.34731 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for United States - Population Ages 15 to 64 for St. Lucia - last updated from the United States Federal Reserve on March of 2024.