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
Year
Population
Growth
Change
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%
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

Population by Race

Race
Population
Percentage (of total)
White27,18956.11%
Black or African American14,08429.07%
Two or more races3,9098.07%
Other race1,8413.8%
Native American7881.63%
Asian6331.31%
Native Hawaiian or Pacific Islander110.02%

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

39.7

Total

39.2

Male

40.7

Female

St. Mary Parish, Louisiana Adults

There are 36,656 adults, (8,704 of whom are seniors) in St. Mary Parish, Louisiana.

St. Mary Parish, Louisiana Age Dependency

73.4

Age Dependency Ratio

31.1

Old Age Dependency Ratio

42.2

Child Dependency Ratio

St. Mary Parish, Louisiana Sex Ratio

Female24,72851.03%
Male23,72748.97%

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
All18,7052.5569.830.2
Married7,9363.1685.414.6
Non Family6,3411.1858.141.9
Female3,3583.5257.142.9
Male1,0703.0964.335.7

3.17

Average Family Size

2.55

Average Household Size

69.8%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

St. Mary Parish, Louisiana Households and Families

Male

Female

Education Attained
Count
Percentage
9th to 12th Grade4,16712.64%
Associates Degree2,0746.29%
Bachelors Degree2,9078.82%
Graduate Degree1,4184.3%
High School Graduate15,16946.02%
Less Than 9th Grade2,2326.77%
Some College4,99415.15%

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

Race
Total
High School
Bachelors
White19,01515,9952,953
Black9,5397,654967
Hispanic2,4111,420169
2+ Races1,8531,569206
Other Race96137335
Asian52823670
Native American47943462
Islander11110

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 15.53%.

St. Mary Parish, Louisiana Educational Attainment by Race

All

Male

Female

Name
Average
Male
Female
Bachelors Degree$47,342$59,321$45,596
Graduate Degree$48,750$54,688$47,875
High School Graduate$38,403$49,045$30,258
Less Than 9th Grade$31,250$48,261$19,003
Overall$41,295$51,436$31,445
Some College$41,358$62,908$31,377

$41,295

Average Earnings

$51,436

Average Male

$31,445

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

90.08% of St. Mary Parish, Louisiana residents speak only English, while 9.92% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 6.72% of the population.

St. Mary Parish, Louisiana Language

St. Mary Parish, Louisiana Poverty by Race

rate

Name
Total
In Poverty
Poverty Rate
Black13,7584,50932.77%
White25,9084,44117.14%
Hispanic4,51999922.11%
Multiple3,84972918.94%
Other1,84156430.64%
Native76011615.26%
Asian63310716.9%

22.07%

Overall Poverty Rate

20.02%

Male Poverty Rate

24.02%

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 32.77% below the poverty level.

The race least likely to be in poverty in St. Mary Parish, Louisiana is Native, with 15.26% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 6%. Among those working part-time, it was 19.12%, and for those that did not work, the poverty rate was 34.73%.

St. Mary Parish, Louisiana Poverty

rate

Rate
Poverty
Less Than 9th Grade26%
High School19.97%
Some College15.12%
Bachelors or Greater13.24%

St. Mary Parish, Louisiana Poverty Rate by Education

rate

Rate
Poverty
Female Unemployed25.73%
Male Unemployed16.83%
Female Employed12.8%
Male Employed6.35%

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

St. Mary Parish, Louisiana Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

Name
Median
Mean
Families$65,357$83,462
Households$51,768$70,302
Married Families$93,445$-999,999,999
Non Families$28,267$41,094

mean

median

Income by Household Type

St. Mary Parish, Louisiana Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

Marriage Rates

43.8%

Overall Marriage Rate

46.3%

Male Marriage Rate

41.3%

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

1,852

Number of Veterans

1,779

Male Veterans

73

Female Veterans

War
Veterans
Vietnam675
First Gulf War548
Second Gulf War290
Korea147
World War II6

St. Mary Parish, Louisiana Veterans by War

count

Age Group
Veterans
65 to 74618
35 to 54491
75+445
55 to 64206
18 to 3492

St. Mary Parish, Louisiana Veterans by Age

count

Name
Veterans
% of Total
White1,3656.37%
Black4203.91%
Other Race262.15%
2+ Races221.05%
Native American162.86%
Hispanic160.57%
Asian30.54%

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

10.45%

Veteran Poverty Rate

35.61%

Veteran Disability Rate

St. Mary Parish, Louisiana Veterans by Education

LaborForceParticipation

54.7%

Labor Force Participation

51.6%

Employment Rate

5.4%

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

84.52%

Born in St. Mary Parish, Louisiana

95.12%

Native Born

4.88%

Foreign Born

2.95%

Non Citizen

1.93%

Naturalized

Place of Birth

95.12% of St. Mary Parish, Louisiana residents were born in the United States, with 84.52% having been born in Louisiana. 2.95% 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