About 402,400 people lived in St. Lucie County, FL in 2025. Population estimates, 2000–2025 What are St. Lucie County, FL's age demographics? Subscribe for weekly, data-driven insights. No spin, just the facts. A higher share of St. Lucie County, FL's population is aged 65 or older than the US as a whole. Population estimates by age group, (2024) What are St. Lucie County, FL's racial and ethnic demographics? St. Lucie County, FL has a higher share of a non-Hispanic Black or African American population than Florida as a whole. Population estimates by race and ethnicity, (2024) Cities and towns in St. Lucie County, FL ranked by population

Population (2024), includes only portions within county St. Lucie Village Balance of St. Lucie County USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare. USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary. US Census Bureau Population Estimates Program US Census Bureau Population Estimates Program US Census Bureau Population Estimates Program US Census Bureau Population Estimates Program