St. Martin Parish, Louisiana
Located in Louisiana, St. Martin Parish has a population of 51,353 residents and a median age of 40.1 years, making it the #999 most populous county out of 3,222 nationwide. In terms of economic indicators, the county has a poverty rate of 15.3%. The median home value is $164,200, and the median household income is $55,960, which is 26% below the national median.
Demographics
St. Martin Parish has a population of 51,353, making it the #999 most populous county in the US. The median age is 40.1 years, which is 3.1% above the national median.
Population Trend
Rankings →Year-over-Year Population Growth
Age & Sex Distribution
Race & Ethnicity
Nativity
Geographic Mobility (Past Year)
Economy
The median household income in St. Martin Parish is $55,960, ranking #2,407 out of 3,222 counties — 25.5% below the national median. The poverty rate is 15.3% and unemployment stands at 4.0%.
Median Household Income Trend
Rankings →Income Distribution
Industry of Employment
Occupation
Housing
The median home value in St. Martin Parish is $164,200 (-41.8% vs national). Renters pay a median of $870/mo and the homeownership rate is 77.7%.
Median Home Value Trend
Rankings →Household Type
Education
In St. Martin Parish, 16.8% of adults age 25+ hold a bachelor's degree or higher, which is 50.3% below the national average, ranking #2,542 out of 3,222 counties.
Bachelor's Degree or Higher Trend
Rankings →Health & Wellbeing
Life expectancy in St. Martin Parish is 73.3 years. 22.5% of adults report poor or fair health and 7.9% lack health insurance. Data from County Health Rankings (2025).
Life Expectancy Trend
Substance Use
21.2% of adults in St. Martin Parish smoke , 40.9% are obese , and 20.8% report excessive drinking. The drug overdose death rate is 39.2 per 100,000.
Adult Smoking Trend
Safety
The homicide rate in St. Martin Parish is 12.4 per 100,000 and the suicide rate is 16.3 per 100,000. Motor vehicle deaths occur at a rate of 21.0 per 100,000.
Homicide Rate Trend
Families & Children
27.0% of children in St. Martin Parish live in poverty and the infant mortality rate is 6.8 per 1,000 live births. The teen birth rate is 29.4 per 1,000 females age 15–19.
Infant Mortality Trend
Civic & Transportation
Voter turnout in St. Martin Parish is 67.3%. The mean commute time is 29.1 min, which is 5.6% above the national average.
Voter Turnout Trend
Mean Commute Time Trend
Rankings →Elections
In the 2024 presidential election, St. Martin Parish voted Republican with a margin of 40.7%. The vote was 29.1% Dem / 69.8% Rep. Compared to 2020, the margin shifted 4.6 toward Republicans .
Vote Share Over Time
About St. Martin Parish, Louisiana
St. Martin Parish, Louisiana has a total population of 51,353, making it the 999th most populous county in the United States. The median age in St. Martin Parish is 40.1 years, which is 3.1% above the national median of 38.9 years.
The median household income in St. Martin Parish is $55,960, which ranks #2,407 of 3,222 counties nationwide. This is 25.5% below the national median of $75,149. The poverty rate is 15.3%, higher than the national rate of 12.6%. The unemployment rate stands at 4.0%.
The median home value in St. Martin Parish is $164,200, 41.8% below the national median. Renters in St. Martin Parish pay a median gross rent of $870 per month. The homeownership rate is 77.7%, compared to the national rate of 64.4%.
In St. Martin Parish, 16.8% of residents aged 25 and older hold a bachelor's degree or higher, 50.3% below the national average of 33.7%. Health insurance coverage stands at 93.9% of the population. The average commute time for workers is 29.1 min.
St. Martin Parish is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 63.1% of the population, followed by Black (non-Hispanic) (28.6%) and Hispanic or Latino (3.6%).
All data for St. Martin Parish, Louisiana comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates. These figures are estimates based on survey sampling and are subject to margin of error. For the most detailed and up-to-date data, visit the Census Bureau's official data portal.