St. Martin Parish, LA

St. Martin Parish is located in south-central Louisiana, just outside Lafayette. The US Census Bureau reports its 2019 population as 53,431, nearly 60% of which for those older than 16 years of age is active in the workforce. As the Gateway to the Atchafalaya Basin, it covers nearly 740 square miles of picturesque sugar cane fields, low-lying swamp land, and rolling hills of moss-draped oaks.

The region has a historical agricultural and oil background, but today it is known for seafood manufacturing, preparation and packaging, cane sugar manufacturing and cemicia/plastics manufacturing.

Population

Total Population

51,264

Population
Growth Rate

-0.25%

Median Age

41

Diversity Index

54.100

Source: ESRI, 2025-09-30

Housing & Income

Households

20,774

Total Housing Units

24,410


Owner Occupied

16,541

Renter Occupied

4,233

Vacant

3,636

Median Home Value

$174,714


Average Home Value

$200,226

Income
Growth Rate

Median
Household Income

0.00%


Per Capita Income

1.88%

Income Projection

Median Household

$54,182 $59,852


Average Household

$74,919 $80,430


Per Capita

$30,414 $33,375

Source: ESRI, 2025-09-30

Workforce

Total Businesses

1,623

Total Employed

17,180

Workers 16+

22,435

2025 Construction Businesses

cp-industries

Businesses

165

Employed

2,485

2025 Educational Services - Businesses

cp-industries

Businesses

35

Employed

2,357

2025 Retail Trade Businesses

cp-industries

Businesses

228

Employed

2,226

2025 HealthCare / Social Assistance

cp-industries

Businesses

106

Employed

1,971

2025 Accommodation / Food Service

cp-industries

Businesses

149

Employed

1,421

2025 Food Service / Drinking Est.

cp-industries

Businesses

128

Employed

1,284

Some
High School

3,473

Graduated
High School

13,991

Associates
Degree

2,449

Bachelor's
Degree

3,957

Graduate
Degree

1,587

Average Commute Time

28 min.



Resident Commuters

9,516

Non-Resident Commuters

12,648

Drive Alone

19,018

Carpooled

1,476

Public

56

Work At Home

1,408

Source: ESRI, 2025-09-30