St. Mary Parish, Louisiana Population 2024

46,291

St. Mary Parish, Louisiana's estimated 2024 population is 46,291 with a growth rate of -1.62% in the past year according to the most recent United States census data. St. Mary Parish, Louisiana is the 23rd largest county in Louisiana. The 2010 population was 54,553 and has seen a growth of -15.14% since that time.

Note: data after 2022 is projected based on recent change

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Year
Population
Growth
Growth Rate
202942,471-764-1.77%
202843,235-764-1.74%
202743,999-764-1.71%
202644,763-764-1.68%
202545,527-764-1.65%
202446,291-764-1.62%
202347,055-764-1.6%
202247,819-400-0.83%
202148,219-923-1.88%
202049,142-152-0.31%
201949,294-445-0.89%
201849,739-934-1.84%
201750,673-1,391-2.67%
201652,064-844-1.6%
201552,908-394-0.74%
201453,302-306-0.57%
201353,608250.05%
201253,583-616-1.14%
201154,199-354-0.65%
201054,55300%
199058,086-6,167-9.6%
198064,2533,5015.76%
197060,75211,91924.41%
196048,83312,98536.22%
195035,8484,39013.96%
194031,4582,0617.01%
193029,397-1,357-4.41%
192030,754-8,614-21.88%
191039,3685,22315.3%
190034,14511,72952.32%
189022,4162,52512.69%
188019,8916,03143.51%
187013,860-2,956-17.58%
186016,8163,11922.77%
185013,6974,74753.04%
18408,9502,50838.93%
18306,442-36,029-84.83%
showing: 37 rows
2024 Growth Rate
-1.62% (-764)
County Website
St. Mary Parish
2020 Population
49,142
Area
559 mi²
Density
83 people/mi²
Growth Since 2020
-5.8% (-2,851)
Founded
1811

St. Mary Parish, Louisiana Population 2024

Population by Race

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Race
Population
Percentage (of total)
White28,42757.88%
Black or African American14,55429.63%
Two or more races3,1106.33%
Other race1,6233.3%
Native American7621.55%
Asian6251.27%
Native Hawaiian or Pacific Islander130.03%

White

Black or African American

Two or more races

Other race

Native American

Asian

Native Hawaiian or Pacific Islander

St. Mary Parish, Louisiana Population by Race

St. Mary Parish, Louisiana Population Pyramid 2024

St. Mary Parish, Louisiana Median Age

39.5

Total

39

Male

40.1

Female

St. Mary Parish, Louisiana Adults

There are 37,393 adults, (8,634 of whom are seniors) in St. Mary Parish, Louisiana.

St. Mary Parish, Louisiana Age Dependency

70.8

Age Dependency Ratio

30

Old Age Dependency Ratio

40.8

Child Dependency Ratio

St. Mary Parish, Louisiana Sex Ratio

Female25,07751.06%
Male24,03748.94%

St. Mary Parish, Louisiana Population by Age

St. Mary Parish, Louisiana Renter vs Owner Occupied by Household Type

Household Type
Count
Average Size
Owner
Renter
All18,6282.669.530.5
Married8,1253.2585.614.4
Non Family6,2921.1657.442.6
Female3,0803.6654.845.2
Male1,131361.438.6

3.26

Average Family Size

2.6

Average Household Size

69.5%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

St. Mary Parish, Louisiana Households and Families

Male

Female

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Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

St. Mary Parish, Louisiana Educational Attainment by Sex (over 25)

St. Mary Parish, Louisiana Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

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The highest rate of high school graduation is among islander people with a rate of 100%.

The highest rate of bachelors degrees is among white people with a rate of 14.3%.

St. Mary Parish, Louisiana Educational Attainment by Race

All

Male

Female

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$41,002

Average Earnings

$50,820

Average Male

$29,698

Average Female

St. Mary Parish, Louisiana Earnings by Educational Attainment

St. Mary Parish, Louisiana Language by Age

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

St. Mary Parish, Louisiana Language

91.31% of St. Mary Parish, Louisiana residents speak only English, while 8.69% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 5.32% of the population.

St. Mary Parish, Louisiana Language

St. Mary Parish, Louisiana Poverty by Race

rate

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Name
Total
In Poverty
Poverty Rate
White27,1534,70217.32%
Black14,2554,58432.16%
Hispanic3,54767018.89%
Multiple3,05753517.5%
Other1,62350931.36%
Asian62512319.68%
Native73411615.8%

21.92%

Overall Poverty Rate

20.49%

Male Poverty Rate

23.27%

Female Poverty Rate

Poverty in St. Mary Parish, Louisiana

The race most likely to be in poverty in St. Mary Parish, Louisiana is Black, with 32.16% below the poverty level.

The race least likely to be in poverty in St. Mary Parish, Louisiana is Native, with 15.8% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 4.49%. Among those working part-time, it was 18.63%, and for those that did not work, the poverty rate was 36.71%.

St. Mary Parish, Louisiana Poverty

rate

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Rate
Poverty
Less Than 9th Grade27.09%
High School21.78%
Some College15.46%
Bachelors or Greater13.63%

St. Mary Parish, Louisiana Poverty Rate by Education

rate

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Rate
Poverty
Female Unemployed39.41%
Male Unemployed24.96%
Female Employed10.59%
Male Employed5.42%

St. Mary Parish, Louisiana Poverty Rate by Employment Status and Sex

St. Mary Parish, Louisiana Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

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mean

median

Income by Household Type

St. Mary Parish, Louisiana Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

44.2%

Overall Marriage Rate

46.4%

Male Marriage Rate

42.0%

Female Marriage Rate

St. Mary Parish, Louisiana Married by Age and Sex

male

female

St. Mary Parish, Louisiana Marriage

The age group where males are most likely to be married is 45-54, while the female age group most likely to be married is 45-54.

St. Mary Parish, Louisiana Marital Status by Race

Married

Widowed

Divorced

Separated

NeverMarried

St. Mary Parish, Louisiana Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

2,068

Number of Veterans

1,963

Male Veterans

105

Female Veterans

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St. Mary Parish, Louisiana Veterans by War

count

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St. Mary Parish, Louisiana Veterans by Age

count

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St. Mary Parish, Louisiana Veterans by Race

St. Mary Parish, Louisiana Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

10.52%

Veteran Poverty Rate

35.34%

Veteran Disability Rate

St. Mary Parish, Louisiana Veterans by Education

LaborForceParticipation

53.4%

Labor Force Participation

50.1%

Employment Rate

5.9%

Unemployment Rate

St. Mary Parish, Louisiana Employment by Age

LaborForceParticipation

St. Mary Parish, Louisiana Employment by Race

LaborForceParticipation

St. Mary Parish, Louisiana Employment by Education

Origin of Non-Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

Europe

Asia

Africa

Oceania

Latin America

North America

84.3%

Born in St. Mary Parish, Louisiana

95.51%

Native Born

4.49%

Foreign Born

2.73%

Non Citizen

1.76%

Naturalized

Place of Birth

95.51% of St. Mary Parish, Louisiana residents were born in the United States, with 84.3% having been born in Louisiana. 2.73% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

St. Mary Parish, Louisiana Place of Birth

Sources