St. Augustine South, Florida Demographics & Population 2026

Population Overview

St. Augustine South is a small community located in Florida, within St. Johns County. The total population is 4,714. It ranks as the 497th most populous out of 955 Census-designated places in Florida.

Age Demographics

The median age in St. Augustine South is 50.4 years. This is 18% higher than the state median of 42.6 years. Only 13.3% of residents are under 18, indicating fewer families with children. 12.3% of residents are 75 or older, suggesting a significant retirement-age population with implications for healthcare services and senior housing.

Economy, Income & Housing

The median household income in St. Augustine South is $75,996. This is 2% higher than the state median of $74,568. It is also 6% lower than the national median of $80,734. The poverty rate stands at 1.8%. This is 86% lower than the state poverty rate of 12.6%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The unemployment rate is 2.6%. This is 46% lower than the state rate of 4.8%. The median home value is $347,400. Housing costs are 3% lower than the state median of $359,000. The home-value-to-income ratio is 4.6x. 94.3% of occupied housing units are owner-occupied. This homeownership rate is 39% higher than the state average of 67.6%.

Race & Ethnicity

St. Augustine South has a predominantly White (non-Hispanic) population, comprising 85.7% of all residents. Hispanic or Latino residents account for 7.6%. The White (non-Hispanic) population is significantly higher than the state average (85.7% vs 50.4%). The Black or African American population (0.2%) is well below the state average of 14.6%. The Hispanic or Latino population (7.6%) is well below the state average of 27.4%. The Asian population is significantly higher than the state average (5.1% vs 2.9%).

Education

43.1% of residents aged 25 and older hold a bachelor's degree or higher. This is 26% higher than the state rate of 34.2%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 95.3%.

Data Sources & Methodology

All demographic data for St. Augustine South, Florida is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Florida state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 955 Census-designated places in Florida. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.