St. Martin Parish, Louisiana Demographics 2026
St. Martin Parish, Louisiana has a population of 51,353, the 21st most populous county in Louisiana. The median household income is $55,960 and the median home value is $164,200. The poverty rate is 15.3%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
St. Martin Parish Quick Facts
How St. Martin Parish Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 51,559 | 51,353 | -0.4% |
| Median household income | $53,394 | $55,960 | +4.8% |
| Median home value | $151,000 | $164,200 | +8.7% |
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
Moderate diversity with one or two groups making up the majority.
State average: 59 | National average: 61
Education
Educational Attainment (Adults 25+)
Cities & Places in St. Martin Parish
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Morgan City | 11,064 | $56,474 | 17.4% | $155,200 |
| Breaux Bridge | 7,501 | $47,806 | 30.4% | $175,900 |
| St. Martinville | 5,297 | $36,130 | 22.3% | $100,100 |
| Henderson | 1,779 | $48,750 | 12.9% | $93,800 |
| Cecilia | 1,742 | $67,109 | 22.6% | N/A |
| Cade | 1,710 | $72,839 | 6.0% | $204,900 |
| Parks | 963 | $86,458 | 8.6% | $152,600 |
| Catahoula | 594 | $44,539 | 31.8% | $151,600 |
Explore Louisiana Rankings
Population Overview
St. Martin Parish is located in Louisiana with a total population of 51,353. It is the 21st most populous county out of 64 in Louisiana. The county encompasses 8 Census-designated places.
Age Demographics
The median age in St. Martin Parish is 40.1 years. This is 6% higher than the state median of 38.0 years.
Economy, Income & Housing
The median household income in St. Martin Parish is $55,960. This is 8% lower than the state median of $60,756. It is also 31% lower than the national median of $80,734. The poverty rate stands at 15.3%. This is 19% lower than the state poverty rate of 18.9%. The unemployment rate is 4.0%. This is 36% lower than the state rate of 6.3%. The median home value is $164,200. Housing costs are 24% lower than the state median of $216,500. With a home-value-to-income ratio of just 2.9x, St. Martin Parish is one of the most affordable housing markets in the area. 77.7% of occupied housing units are owner-occupied. This homeownership rate is 15% higher than the state average of 67.4%.
Race & Ethnicity
The largest racial or ethnic group in St. Martin Parish is White (non-Hispanic), making up 63.1% of the population. Black or African American residents account for 28.6%. The Asian population (0.8%) is well below the state average of 1.7%.
Education
16.8% of residents aged 25 and older hold a bachelor's degree or higher. This is 38% 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 83.2%.
Data Sources & Methodology
All figures for St. Martin Parish come from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates, with comparisons drawn against Louisiana and national averages from the same dataset. See our methodology page for how each metric is defined, or data.census.gov for official tables with margins of error.
Frequently Asked Questions
What is the population of St. Martin Parish, Louisiana?
St. Martin Parish has a population of 51,353, making it the 21st most populous county in Louisiana.
What is the median income in St. Martin Parish?
The median household income in St. Martin Parish is $55,960 with a poverty rate of 15.3%.
How many cities are in St. Martin Parish, Louisiana?
St. Martin Parish contains 8 Census-designated places.