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COUNTY

St. Mary Parish

Louisiana · 46,552 residents (2025 est.) · 559 sq mi
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Part of the Morgan City micropolitan area
The short version

With 47,828 people, St. Mary Parish is a county in Louisiana. 14% of adults hold a bachelor's degree, below the 36% national rate. Home values have more than doubled since 2000, reaching $138,900. The poverty rate is 20.8%, above the 12.5% national rate. The foreign-born share is 5%. Median rent is $848 a month.

At a glance
Lower income
below the US median
US median: $82,259
Mid-age
median age 39.7
US median: 38.9
Less educated
14% hold a bachelor's degree
US average: 36%
Stable housing
home values roughly flat, inflation adjusted
US median home: $376,019
Section 01

Population & growth

Total population
47,828
−11%since 2000
from 53,500 in 2000
46,552 in 2025 (Census Bureau estimate)
1990 – 2025
Population density
86 / sq mi
−6%since 2009
from 91 / sq mi in 2009
US average: 281
Median age
39.7
+16%since 2000
from 34.3 in 2000
US average: 38.9
Land area
559 sq mi
Population, 1990 – 2024
47K50K53K56K59K19902000201020202024St. Mary Parish
202448K
1990201020202024
Age distribution, 2024
Under 56.6%(3,171)
US avg: 5.6%
5 to 96.6%(3,167)
US avg: 6%
10 to 147.1%(3,376)
US avg: 6.4%
15 to 196.6%(3,153)
US avg: 6.6%
20 to 245.1%(2,444)
US avg: 6.5%
25 to 3411.5%(5,504)
US avg: 13.7%
35 to 4412%(5,729)
US avg: 13.2%
45 to 5411.5%(5,499)
US avg: 12.2%
55 to 6414.7%(7,014)
US avg: 12.7%
65 to 7410.8%(5,173)
US avg: 10.2%
75 to 845.6%(2,677)
US avg: 5.1%
85 and over1.9%(921)
US avg: 1.9%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02

Income & economy

Median household income
$52,576
+3%inflation adjusted, since 2000
from $28,072 in 2000
US average: $82,259
1990 – 2024
Per capita income
$28,265
+111%since 2000
from $13,399 in 2000
US average: $44,673
Households earning $100K+
35.3%
+12.8 ptssince 2009
from 22.5% in 2009
US average: 53.3%
Poverty rate
20.8%
−2.8 ptssince 2000
from 23.6% in 2000
US average: 12.5%
Income inequality (Gini)
0.473
+8%since 2010
from 0.437 in 2010
US average: 0.476
Workforce by industry, 2024
Information14.3%
US avg: 10.8%
Wholesale trade10.4%
US avg: 6.9%
Retail trade9.7%
US avg: 9.9%
Agriculture, forestry, fishing9.1%
US avg: 1.6%
Manufacturing7.4%
US avg: 0.4%
Finance & insurance5.3%
US avg: 5.9%
Professional, scientific, technical4.3%
US avg: 5.1%
Other services3%
US avg: 6.7%
Transportation & warehousing2.4%
US avg: 2.2%
Public administration2.3%
US avg: 4.8%
Construction1.7%
US avg: 1.2%
Education & health services1%
US avg: 0.9%
Arts, entertainment, food0.7%
US avg: 1.9%
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 03

Housing

Median home value
$138,900
+21%inflation adjusted, since 2000
from $63,100 in 2000
US average: $376,019
1990 – 2024
Median gross rent
$848
+17%inflation adjusted, since 2000
from $397 in 2000
US average: $1,442
Owner-occupied
68.6%
−5.3 ptssince 2000
from 73.9% in 2000
31.4% rent
Vacancy rate
18.0%
+5.2 ptssince 2009
from 12.7% in 2009
US average: 10.0%
Persons per household
2.55 people
Unchangedsince 2009
from 2.55 people in 2009
US average: 2.54
Owner cost-burdened
16.1%
−2.0 ptssince 2009
from 18.1% in 2009
US average: 22.9%
Renter cost-burdened
43.3%
+7.2 ptssince 2009
from 36.2% in 2009
US average: 47.4%
Afford Score
2.6
+24%since 2009
from 2.1 in 2009
2009 – 2024
Years of local income it takes to buy a local home, on a scale of about 0 to 15. Lower is more affordable.
Gentrification Score
22
Our index, 0 to 100. Higher means faster recent growth in incomes, home values, and college degrees.
Section 04

Race & ethnicity

2000
White, non-Hispanic61.8%(33,051)
Black31.7%(16,945)
Hispanic / Latino2.2%(1,152)
Asian1.6%(854)
Other0%
2024
White, non-Hispanic53.4%(25,540)
Black28.8%(13,765)
Hispanic / Latino9.8%(4,705)
Asian1%(466)
Other7%(3,352)
Diversity Score
77
+16%since 2009
from 67 in 2009
2009 – 2024
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
Segregation Score
28
−15%since 2020
from 33 in 2020
Our index, 0 to 100. Higher means White and non-White residents are more separated across neighborhoods.
Section 04 · Origins

Detailed origins & ancestry

Hispanic origin
Mexican4.1%(1,969)
Central American2.7%(1,305)
Honduran2.1%(1,020)
Guatemalan0.5%(231)
Cuban0.4%(203)
Puerto Rican0.4%(169)
Dominican0.3%(136)
Chilean0.2%(93)
Panamanian0.1%(32)
Spaniard0%(17)
+ 1 more hispanic origin group with data
Asian origin
Vietnamese1%(458)
Chinese0%(8)
Pacific Islander origin
Samoan0%(18)
Chamorro0%(17)
Ancestry
French12.9%(6,185)
German5.8%(2,788)
American5.2%(2,484)
Irish4.4%(2,115)
English4.4%(2,101)
Italian3.6%(1,712)
French Canadian2.3%(1,122)
Scottish0.3%(137)
Russian0.2%(117)
Czech0.2%(107)
Welsh0.2%(107)
Greek0.2%(103)
+ 24 more ancestry groups with data
British0.2%(83)
Scotch-Irish0.1%(71)
Dutch0.1%(57)
Arab0.1%(40)
Belgian0.1%(36)
Polish0.1%(36)
Lebanese0.1%(35)
Swedish0.1%(35)
West Indian0.1%(28)
Danish0%(19)
Haitian0%(19)
Norwegian0%(18)
Serbian0%(7)
Slovene0%(5)
Section 05

Education

Bachelor's degree or higher
13.6%
+4.2 ptssince 2000
from 9.4% in 2000
US average: 35.6%
High school or higher
80.3%
+14.4 ptssince 2000
from 65.9% in 2000
US average: 89.6%
Graduate degree
4.1%
+1.6 ptssince 2000
from 2.5% in 2000
US average: 14.0%
Section 06

Commute & transportation

Average commute
23.2 min
+71%since 2000
from 13.6 min in 2000
US average: 26.5
Drive alone to work
84.7%
+5.6 ptssince 2009
from 79.1% in 2009
US average: 68.9%
Carpooled to work
7.6%
−5.8 ptssince 2009
from 13.4% in 2009
US average: 8.5%
Public transit
0.0%
−0.5 ptssince 2009
from 0.5% in 2009
US average: 3.2%
Worked from home
5.5%
+3.7 ptssince 2009
from 1.8% in 2009
US average: 15.0%
Walked to work
1.4%
−1.4 ptssince 2009
from 2.8% in 2009
US average: 2.4%
Biked to work
0.5%
+0.3 ptssince 2009
from 0.2% in 2009
US average: 0.4%
No vehicle available
11.3%
+0.3 ptssince 2009
from 11.0% in 2009
US average: 8.3%
Section 07

Work & employment

Unemployment rate
5.4%
−3.4 ptssince 2011
from 8.7% in 2011
US average: 5.2%
Labor force participation
54.2%
−4.6 ptssince 2011
from 58.9% in 2011
US average: 63.5%
Women 20-64 in the labor force
63.3%
+2.9 ptssince 2020
from 60.4% in 2020
US average: 74.6%
Self-employed
13.5%
+0.8 ptssince 2009
from 12.7% in 2009
US average: 13.1%
Management & professional
24.7%
+1.6 ptssince 2009
from 23.1% in 2009
US average: 42.5%
Section 08

People & community

Male
48.6%
−0.2 ptssince 2009
from 48.8% in 2009
Female
51.4%
+0.2 ptssince 2009
from 51.2% in 2009
Foreign born
5.0%
+2.2 ptssince 2009
from 2.7% in 2009
US average: 14.1%
Veterans
5.1%
−4.7 ptssince 2009
from 9.8% in 2009
US average: 6.2%
With a disability
16.7%
−2.5 ptssince 2012
from 19.2% in 2012
US average: 13.3%
Uninsured
8.5%
−12.0 ptssince 2013
from 20.5% in 2013
US average: 8.4%
Broadband at home
87.4%
+21.1 ptssince 2017
from 66.3% in 2017
US average: 91.0%
Computer in household
89.9%
+9.1 ptssince 2020
from 80.8% in 2020
US average: 95.5%
Same house as last year
89.2%
+2.3 ptssince 2020
from 86.8% in 2020
US average: 87.7%
English only at home
90.0%
+0.2 ptssince 2016
from 89.8% in 2016
US average: 77.7%
Spanish at home
7.3%
+2.0 ptssince 2016
from 5.2% in 2016
US average: 13.6%
Marital status
Men 15+
Never married37.4%(6,897)
Married48.5%(8,925)
Widowed2.6%(476)
Divorced11.5%(2,120)
Women 15+
Never married33.5%(6,606)
Married42%(8,271)
Widowed11.6%(2,292)
Divorced12.8%(2,527)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Section 09

Health coverage

Uninsured
8.5%
−12.0 ptssince 2013
from 20.5% in 2013
US average: 8.4%
Employer-based
33.3%
−2.2 ptssince 2020
from 35.5% in 2020
US average: 54.8%
Direct-purchase
15.4%
+2.4 ptssince 2020
from 13.0% in 2020
US average: 13.8%
Medicare
20.1%
−0.9 ptssince 2020
from 21.0% in 2020
US average: 18.4%
Medicaid
39.9%
−2.0 ptssince 2020
from 41.9% in 2020
US average: 20.9%
VA health care
2.1%
−0.1 ptssince 2020
from 2.2% in 2020
US average: 2.2%
Any private
48.0%
−0.4 ptssince 2020
from 48.4% in 2020
US average: 67.1%
Any public
55.4%
−2.3 ptssince 2020
from 57.7% in 2020
US average: 36.7%

Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.

Section 09 · Service history

Veterans

Veterans by period of service, 2024
Gulf War (2001 or later)20.9%(387)
US avg: 26.4%
Gulf War (1990s)21.9%(406)
US avg: 24.3%
Vietnam era38.9%(720)
US avg: 33.1%
Korean War5.8%(108)
US avg: 4.5%
World War II0.3%(5)
US avg: 1%

Share of the 1,852 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.

BAR + DOT: THIS PLACE · TICK: US AVERAGE
Drill deeper

Places similar to St. Mary Parish

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Pop 46,210
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Pop 44,407
Tift County
Pop 42,254
Baldwin County
Pop 44,029
Places similar to St. Mary Parish
Head to head

Compare St. Mary Parish to nearby counties

ST. MARY PARISH VS
Iberia Parish
Income$56,961+8%
Home value$164,500+18%
Population66,846+44%
SEE FULL COMPARISON →
ST. MARY PARISH VS
Assumption Parish
Income$51,423−2%
Home value$150,300+8%
Population19,720−58%
SEE FULL COMPARISON →
ST. MARY PARISH VS
St. Martin Parish
Income$55,960+6%
Home value$164,200+18%
Population51,106+10%
SEE FULL COMPARISON →
ST. MARY PARISH VS
Terrebonne Parish
Income$64,836+23%
Home value$187,200+35%
Population104,163+124%
SEE FULL COMPARISON →
Frequently asked

How many people live in St. Mary Parish, Louisiana?

St. Mary Parish, Louisiana has about 47,828 residents according to the 2024 American Community Survey.

What is the median household income in St. Mary Parish, Louisiana?

The typical household in St. Mary Parish, Louisiana earns about $52,576 a year. Half of households make more than that, and half make less.

Is St. Mary Parish, Louisiana expensive?

In St. Mary Parish, Louisiana, the median home is worth about $138,900, and the typical rent is about $848 a month.

How educated are people in St. Mary Parish, Louisiana?

About 13.6% of adults age 25 and over in St. Mary Parish, Louisiana hold a bachelor's degree or higher.

What is the poverty rate in St. Mary Parish, Louisiana?

About 20.8% of people in St. Mary Parish, Louisiana live below the federal poverty line.

Has St. Mary Parish, Louisiana grown since 1990?

Yes, St. Mary Parish, Louisiana has shrunk since 1990. The population has lost about 10,258 residents, a change of about -18 percent over that period.

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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024

How we source and harmonize this data →