St. Martinville, Louisiana Demographics & Population 2026

Population Overview

St. Martinville is a small city located in Louisiana, within St. Martin Parish. The total population is 5,297. It ranks as the 101st most populous out of 488 Census-designated places in Louisiana.

Age Demographics

The median age in St. Martinville is 49.4 years. This is 30% higher than the state median of 38.0 years. Only 11.7% 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. Martinville is $36,130. This is 41% lower than the state median of $60,756. It is also 55% lower than the national median of $80,734. The poverty rate stands at 22.3%. This is 18% higher than the state poverty rate of 18.9%. With more than one in five residents living below the poverty line, economic hardship is a significant challenge for the community. The unemployment rate is 9.0%. This is 43% higher than the state rate of 6.3%. The median home value is $100,100. Housing costs are 54% lower than the state median of $216,500. With a home-value-to-income ratio of just 2.8x, St. Martinville is one of the most affordable housing markets in the area. 56.9% of occupied housing units are owner-occupied. This homeownership rate is 16% lower than the state average of 67.4%.

Race & Ethnicity

The largest racial or ethnic group in St. Martinville is Black or African American, making up 48.9% of the population. White (non-Hispanic) residents account for 45.2%. The Black or African American population is significantly higher than the state average (48.9% vs 30.5%). The Hispanic or Latino population (1.5%) is well below the state average of 7.2%. The Asian population (0.4%) is well below the state average of 1.7%.

Education

17.4% of residents aged 25 and older hold a bachelor's degree or higher. This is 36% lower than the state rate of 27.0%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 77.5%.

Data Sources & Methodology

All demographic data for St. Martinville, Louisiana 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 Louisiana state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 488 Census-designated places in Louisiana. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.