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

Population	2000	2010	2026	2031
St. Martin Parish, LA	48,578	52,155	50,958	50,518

Source: ESRI, 2026-09-09

Population by Age

Population	2026
0-4	2,984
5-9	3,134
10-14	3,217
15-19	3,313
20-24	2,832
25-29	3,017
30-34	2,990
35-39	3,069
40-44	3,414
45-49	3,084
50-54	2,908
55-59	3,246
60-64	3,423
65-69	3,623
70-74	2,702
75-79	1,995
80-84	1,145
85+	862
18+	39,601
Median Age	41

Source: ESRI, 2026-09-09

Population by Race

St. Martin Parish, LA	2026
Total	50,958.00
White Alone	63.67%
Black Alone	28.94%
American Indian Alone	0.4%
Asian Alone	0.84%
Pacific Islander Alone	0.02%
Some Other Race	1.75%
Two or More Races	4.37%
Hispanic Origin	4.08%
Diversity Index	54.70

Source: ESRI, 2026-09-09

Growth Rate

St. Martin Parish, LA	2026 - 2031
Population	-0.17%
Households	0.26%
Families	0.07%
Median Household Income	2%
Per Capita Income	2%

Source: ESRI, 2026-09-09

Housing

Households

Population	2000	2010	2026	2031
Households	17,163	19,215	20,779	21,049
Housing Units	20,244	21,940	24,537	24,954
Owner Occupied Units			16,449	16,842
Renter Occupied Units			4,330	4,207
Vacant Units			3,758	3,905

Source: ESRI, 2026-09-09

Home Value

St. Martin Parish, LA	2026	2031
Median Home Value	$188,213	$238,559
Average Home Value	$209,736	$248,733
<$50,000	1,598	1,390
$50,000 - $99,999	2,420	1,735
$100,000 - $149,999	2,222	1,472
$150,000 - $199,999	2,464	1,886
$200,000 - $249,999	2,315	2,513
$250,000 - $299,999	1,748	2,236
$300,000 - $399,999	2,381	3,475
$400,000 - $499,999	863	1,423
$500,000 - $749,999	353	611
$1,000,000 +	27	26

Source: ESRI, 2026-09-09

Housing Year Built

Year Range	Houses Built
2010 or Later	2,880
2000-2009	4,078
1990-1999	2,981
1980-1989	3,323
1970-1979	3,737
1960-1969	2,409
1950-1959	1,796
1940-1949	1,138
1939 or Before	947

Source: ESRI, 2026-09-09

Income

St. Martin Parish, LA	2026	2031
Median Household	$56,978	$63,558
Average Household	$75,841	$83,938
Per Capita	$30,990	$35,040

Source: ESRI, 2026-09-09

Household Income

St. Martin Parish, LA	2026
<$15,000	2,910
$15,000 - $24,999	2,234
$25,000 - $34,999	1,729
$35,000 - $49,999	2,558
$50,000 - $74,999	3,433
$75,000 - $99,999	2,243
$100,000 - $149,999	3,103
$150,000 - $199,999	1,576
$200,000+	993

Source: ESRI, 2026-09-09

Employees

Commute

Category	Commuters
Workers 16+	22,221
In-County Residents	9,684
Out-of-County Residents	12,181
Drive Alone	18,404
Carpooled	1,480
Public Transport	88
Work at Home	1,797
Motorcycle	0
Bicycle	40
Walked	227
Other	166
Less than 5 minutes	1,177
5-9 minutes	2,000
10-14 minutes	2,471
15-19 minutes	2,031
20-24 minutes	2,912
25-29 minutes	1,481
30-34 minutes	3,719
35-39 minutes	818
40-44 minutes	930
45-59 minutes	1,236
60-89 minutes	823
90+ minutes	826
Average Travel Time	27

Source: ESRI, 2026-09-09

Employees by NAICS

Category	Number
Total Employees	16,613
Agr/Forestry/Fish/Hunt	100
Mining	269
Utilities	75
Construction	2,271
Manufacturing	1,180
Wholesale Trade	1,102

Retail Trade	2,127
Motor Veh/Parts Dealers	387
Furn & Home Furnish Str	2
Electronics & Appl Store	31
Bldg Matl/Garden Equip	216
Food & Beverage Stores	569
Health/Pers Care Stores	124
Gasoline Stations	253
Clothing/Accessory Store	27
Sports/Hobby/Book/Music	84
General Merchandise Str	434

Transportation/Warehouse	379
Information	123

Finance & Insurance	332
Cntrl Bank/Crdt Intrmdtn	210
Sec/Cmdty Cntrct/Oth Inv	41
Insur/Funds/Trusts/Other	81

Real Estate/Rent/Leasing	329
Prof/Scientific/Tech Srv	568
Legal Services	128
Mgmt of Comp/Enterprises	6
Admin/Support/Waste Mgmt	256
Educational Services	2,314
HealthCare/Social Assist	1,798
Arts/Entertainment/Rec	332

Accommodation/Food Srvcs	1,484
Accommodation	117
Food Srv/Drinking Places	1,367

Other Srv excl Pub Admin	619
Auto Repair/Maintenance	101
Public Administration Emp	932

Source: ESRI, 2026-09-09

Educational Attainment (25+)

St. Martin Parish, LA	2026
<9th Grade	1,718
Some High School	3,221
GED	1,716
Graduated High School	14,591
Some College/No Degree	5,183
Associates Degree	2,729
Bachelor's Degree	4,660
Graduate Degree	1,660

Source: ESRI, 2026-09-09

Businesses

Businesses by NAICS

Category	Number
Total Businesses	1,610
Agr/Forestry/Fish/Hunt Bus	18
Mining Bus	12
Utilities Bus	9
Construction Bus	164
Manufacturing Bus	76
Wholesale Trade Bus	70

Retail Trade Bus	226
Motor Veh/Parts Dealers Bus	37
Furn & Home Furnish Str Bus	1
Electronics & Appl Store Bus	4
Bldg Matl/Garden Equip Bus	16
Food & Beverage Stores Bus	48
Health/Pers Care Stores Bus	24
Gasoline Stations Bus	32
Clothing/Accessory Store Bus	10
Sports/Hobby/Book/Music Bus	28
General Merchandise Str Bus	26

Transportation/Warehouse Bus	51
Information Bus	20

Finance & Insurance Bus	72
Cntrl Bank/Crdt Intrmdtn Bus	40
Sec/Cmdty Cntrct/Oth Inv Bus	11
Insur/Funds/Trusts/Other Bus	21

Real Estate/Rent/Leasing Bus	61
Prof/Scientific/Tech Srv Bus	95
Legal Services Bus	20
Mgmt of Comp/Enterprises Bus	2
Admin/Support/Waste Mgmt Bus	56
Educational Services Bus	37
HealthCare/Social Assist Bus	102
Arts/Entertainment/Rec Bus	61

Accommodation/Food Srvcs Bus	145
Accommodation Bus	21
Food Srv/Drinking Places Bus	124

Other Srv excl Pub Admin Bus	174
Auto Repair/Maintenance Bus	32
Public Administration Bus	76

Source: ESRI, 2026-09-09