St. Mary Parish, Louisiana Population 2023

47,834

St. Mary Parish, Louisiana's estimated 2023 population is 47,834 with a growth rate of -1.08% 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 54,650 and has seen a growth of -12.47% since that time.

Note: data after 2021 is projected based on recent change
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St. Mary Parish, Louisiana Population 2023

Population by Race

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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 2023

St. Mary Parish, Louisiana Median Age

39.4

Total

38.4

Male

40.3

Female

St. Mary Parish, Louisiana Adults

There are 38,005 adults, (8,387 of whom are seniors) in St. Mary Parish, Louisiana.

St. Mary Parish, Louisiana Age Dependency

68.9

Age Dependency Ratio

28.3

Old Age Dependency Ratio

40.6

Child Dependency Ratio

St. Mary Parish, Louisiana Sex Ratio

Female25,33750.65%
Male24,68349.35%

St. Mary Parish, Louisiana Population by Age

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

3.6

Average Family Size

2.51

Average Household Size

60.7%

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 islander people with a rate of 62.5%.

St. Mary Parish, Louisiana Educational Attainment by Race

All

Male

Female

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$35,903

Average Earnings

$44,083

Average Male

$26,943

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

91.77% of St. Mary Parish, Louisiana residents speak only English, while 8.23% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 4.87% of the population.

St. Mary Parish, Louisiana Language

St. Mary Parish, Louisiana Poverty by Race

rate

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24.36%

Overall Poverty Rate

18.61%

Male Poverty Rate

20.9%

Female Poverty Rate

Poverty in St. Mary Parish, Louisiana

The race most likely to be in poverty in St. Mary Parish, Louisiana is Islander, with 87.5% below the poverty level.

The race least likely to be in poverty in St. Mary Parish, Louisiana is White, with 18.21% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 3.07%. Among those working part-time, it was 16.6%, and for those that did not work, the poverty rate was 32.43%.

St. Mary Parish, Louisiana Poverty

rate

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St. Mary Parish, Louisiana Poverty Rate by Education

rate

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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

37.6%

Overall Marriage Rate

40.0%

Male Marriage Rate

35.3%

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 Over 65, 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

2,267

Number of Veterans

2,120

Male Veterans

147

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

9.37%

Veteran Poverty Rate

35.52%

Veteran Disability Rate

St. Mary Parish, Louisiana Veterans by Education

LaborForceParticipation

52.9%

Labor Force Participation

49.2%

Employment Rate

6.7%

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

86.85%

Born in St. Mary Parish, Louisiana

97.21%

Native Born

4.03%

Foreign Born

2.64%

Non Citizen

1.39%

Naturalized

Place of Birth

97.21% of St. Mary Parish, Louisiana residents were born in the United States, with 86.85% having been born in Louisiana. 2.64% 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