How many people live in St. Martin Parish, LA?
Updated Apr. 6, 2026Refreshed annually
In 2024, there were about 51,200 people living in St. Martin Parish, LA. That makes St. Martin Parish the 20th-most populous parish in Louisiana. It is home to 1.1% of people living in the state.
51.2K
population of St. Martin Parish, LA (2024)
1.1%
County share of the Louisiana population (2024)
About 51,200 people lived in St. Martin Parish, LA in 2024.
Population estimates, 2000–2024
What are St. Martin Parish, LA’s age demographics?
About 9,400 St. Martin Parish, LA residents are aged 65 and older in 2024. That represents 18.3% of its population. For comparison, the age group represents 17.8% of Louisiana’s population and 18% in the US overall.
Another 12,200 St. Martin Parish, LA residents, or 23.8% of the population, were children under 18. For comparison, the age group represents 23.3% of Louisiana’s population and 21.6% in the US overall.
A higher share of St. Martin Parish, LA's population is aged under 18 than the US as a whole.
Population estimates by age group, (2024)
What are St. Martin Parish, LA’s racial and ethnic demographics?
Non-Hispanic white residents make up 63.6% of the St. Martin Parish, LA population, higher than the national share of 57.5%. St. Martin Parish, LA also has a larger share of people identifying as non-Hispanic Black or African American (29.1%) than the US overall (12.6%).
In contrast, St. Martin Parish’s Hispanic population accounts for 4.2%, below the 20% nationwide, and the non-Hispanic Asian population makes up 0.93% of the parish, compared with 6.5% nationally.
Racial and ethnic make up differ based on location. These figures reflect how people identified their race alone (not in combination with other races), and separate out Hispanic or Latino ethnicity, following Census reporting standards.
St. Martin Parish, LA has a higher share of a non-Hispanic white population than Louisiana as a whole.
Population estimates by race and ethnicity, (2024)
The largest city or town in St. Martin Parish, LA is Breaux Bridge with about 7,600 residents in 2024.
Cities and towns in St. Martin Parish, LA ranked by population
Population (2024), includes only portions within parish
| City or town | Population | |
|---|---|---|
| 1. | Breaux Bridge | 7,582 |
| 2. | St. Martinville | 5,229 |
| 3. | Henderson | 1,605 |
| 4. | Parks | 632 |
| 5. | Broussard (pt.) | 203 |
| 6. | Arnaudville (pt.) | 37 |
| 7. | Morgan City (pt.) | |
| 8. | Balance of St. Martin Parish | 35,930 |
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
The analysis was generated with the help of AI and reviewed by USAFacts for accuracy.
Page sources
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.
