Total Population
50,958
Population
Growth Rate
-0.17%
Median Age
41
Diversity Index
54.700
Source: ESRI, 2026-09-09
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
Housing & Income
Households
20,779
Total Housing Units
24,537
Owner Occupied
16,449
Renter Occupied
4,330
Vacant
3,758
Median Home Value
$188,213
Average Home Value
$209,736
Income
Growth Rate
Median
Household Income
0.00%
Per Capita Income
2.49%
Income Projection
Median Household
$56,978 $63,558
Average Household
$75,841 $83,938
Per Capita
$30,990 $35,040
Source: ESRI, 2026-09-09
Workforce
Total Businesses
1,610
Total Employed
16,613
Workers 16+
22,221
2026 Educational Services - Businesses
Businesses
37
Employed
2,314
2026 Construction Businesses
Businesses
164
Employed
2,271
2026 Retail Trade Businesses
Businesses
226
Employed
2,127
2026 HealthCare / Social Assistance
Businesses
102
Employed
1,798
2026 Accommodation / Food Service
Businesses
145
Employed
1,484
2026 Food Service / Drinking Est.
Businesses
124
Employed
1,367
Some
High School
3,221
Graduated
High School
14,591
Associates
Degree
2,729
Bachelor's
Degree
4,660
Graduate
Degree
1,660
Average Commute Time
27 min.
Resident Commuters
9,684
Non-Resident Commuters
12,181
Drive Alone
18,404
Carpooled
1,480
Public
88
Work At Home
1,797
Source: ESRI, 2026-09-09