St. Tammany Parish, Louisiana Population 2021

St. Tammany Parish, Louisiana's estimated population is 265,187 with a growth rate of 0.91% in the past year according to the most recent United States census data. St. Tammany Parish, Louisiana is the 5th largest county in Louisiana. The 2010 Population was 234,544 and has seen a growth of 13.06% since this time.

Note: 2020 and 2021 data is projected
Year Population Growth Growth Rate
2021265,1872,3840.91%
2020262,8032,3840.92%
2019260,4192,3840.92%
2018258,0352,1140.83%
2017255,9213,4531.37%
2016252,4683,5381.42%
2015248,9303,6931.51%
2014245,2373,2841.36%
2013241,9532,8891.21%
2012239,0642,2180.94%
2011236,8462,3020.98%
2010234,54490,03662.31%
1990144,50833,63930.34%
1980110,86947,28474.36%
197063,58524,94264.54%
196038,64311,65543.19%
195026,9883,36414.24%
194023,6242,69512.88%
193020,9292841.38%
192020,6451,7289.13%
191018,9175,58241.86%
190013,3353,17531.25%
189010,1603,27347.52%
18806,8871,30123.29%
18705,5861803.33%
18605,406-958-15.05%
18506,3641,76638.41%
18404,5981,73460.54%
18302,8641,14166.22%
18201,7230.00%
2021 Growth Rate
0.91%
County Website
Founded
October 27, 1810
County Seat
2010 Population
234,544
Growth Since 2010
13.06%
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St. Tammany Parish, Louisiana Population Growth

Population by Race

Race Population Percentage
White211,27682.80%
Black or African American30,92512.12%
Two or More Races4,7401.86%
Asian4,1351.62%
Some Other Race2,5391.00%
American Indian and Alaska Native1,4890.58%
Native Hawaiian and Other Pacific Islander510.02%
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St. Tammany Parish, Louisiana Population by Race

St. Tammany Parish, Louisiana Population Pyramid $2021

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St. Tammany Parish, Louisiana Median Age

40.2


Total

38.9


Male

41.2


Female

St. Tammany Parish, Louisiana Adults

There are 193,703 adults, (41,823 of whom are seniors) in St. Tammany Parish, Louisiana.

St. Tammany Parish, Louisiana Age Dependency

68

Age Dependency Ratio

27.5

Old Age Dependency Ratio

40.5

Child Dependency Ratio

St. Tammany Parish, Louisiana Sex Ratio

Female

131,325

51.47%

Male

123,830

48.53%

St. Tammany Parish, Louisiana Population by Age

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

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St. Tammany Parish, Louisiana Household Types

Type Owner Renter
Married89.3%10.7%
All78.4%21.6%
Male74.5%25.5%
Female66.4%33.6%
Non Family64.6%35.4%

78.4%

Rate of Home Ownership

St. Tammany Parish, Louisiana Households and Families

Type Count Average Size Owned
All92,9622.7278.4
Married49,4593.2889.3
Non Family27,5841.2264.6
Female12,1053.5166.4
Male3,8143.7874.5

3.28

Average Family Size

2.72

Average Household Size

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St. Tammany Parish, Louisiana Households by Type

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Education Attained Count Percentage
Less Than 9th Grade5,1152.93%
9th to 12th Grade11,3666.52%
High School Graduate46,45026.64%
Some College41,04123.54%
Associates Degree11,3826.53%
Bachelors Degree38,20921.92%
Graduate Degree20,76911.91%
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St. Tammany Parish, Louisiana Educational Attainment by Sex (over 25)

St. Tammany Parish, Louisiana Educational Attainment by Race

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Race Total High School Bachelors
White141,382130,43051,223
Black19,01116,2494,119
Hispanic8,6956,5861,506
Asian2,8412,4441,427
2+ Races1,7261,571409
Other Race1,661996268
Native American985846180
Islander13

The highest rate of high school graduation is among white people with a rate of 92.25%.

The highest rate of bachelors degrees is among asian people with a rate of 50.23%.

St. Tammany Parish, Louisiana Educational Attainment by Race

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Name Average Male Female
Overall$42,780$54,082$33,114
Less Than 9th Grade$24,576$30,695$16,937
High School Graduate$31,527$40,472$24,963
Some College$39,289$53,186$30,893
Bachelors Degree$53,772$75,156$42,537
Graduate Degree$77,211$107,788$59,392

$42,780

Average Earnings

$54,082

Average Male

$33,114

Average Female

St. Tammany Parish, Louisiana Earnings by Educational Attainment

St. Tammany Parish, Louisiana Language by Age

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St. Tammany Parish, Louisiana Language

93.41% of St. Tammany Parish, Louisiana residents speak only English, while 6.59% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 3.99% of the population.

St. Tammany Parish, Louisiana Language

St. Tammany Parish, Louisiana Poverty by Race

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Name Total In Poverty Poverty Rate
White198,88918,3059.20%
Black30,0865,69518.93%
Hispanic14,1773,30523.31%
Multiple4,6701,22126.15%
Other2,50093037.20%
Asian4,11952312.70%
Native1,47632221.82%

11.47%

Overall Poverty Rate

9.90%

Male Poverty Rate

12.93%

Female Poverty Rate

Poverty in St. Tammany Parish, Louisiana

The race most likely to be in poverty in St. Tammany Parish, Louisiana is Other, with 37.20% below the poverty level.

The race least likely to be in poverty in St. Tammany Parish, Louisiana is White, with 9.20% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 2.28%. Among those working part-time, it was 14.34%, and for those that did not work, the poverty rate was 17.88%.

St. Tammany Parish, Louisiana Poverty

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Name Poverty
Less Than 9th Grade28.01%
High School11.48%
Some College9.22%
Bachelors or Greater3.83%

St. Tammany Parish, Louisiana Poverty Rate by Education

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Rate Poverty
Male Unemployed38.83%
Female Unemployed38.69%
Female Employed6.99%
Male Employed3.70%

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

St. Tammany Parish, Louisiana Income by Household Type

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Name Median Mean
Households$68,905$91,595
Families$84,271$108,260
Married Families$98,730$125,262
Non Families$35,068$48,818
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Income by Household Type

St. Tammany Parish, Louisiana Marital Status

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Marriage Rates

51.4%

Overall Marriage Rate

53.8%

Male Marriage Rate

49.1%

Female Marriage Rate

St. Tammany Parish, Louisiana Married by Age and Sex

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St. Tammany Parish, Louisiana Marriage

The age group where males are most likely to be married is 55-64, while the female age group most likely to be married is 35-44.

St. Tammany Parish, Louisiana Marital Status by Race

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St. Tammany Parish, Louisiana Marital Status

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16,817

Number of Veterans

14,942

Male Veterans

1,875

Female Veterans

War Veterans
Vietnam5,869
First Gulf War4,469
Second Gulf War3,433
Korea1,230
World War II400

St. Tammany Parish, Louisiana Veterans by War

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Age Group Veterans
35 to 545,063
65 to 744,135
75+3,599
55 to 642,738
18 to 341,282

St. Tammany Parish, Louisiana Veterans by Age

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Name Veterans % of Total
White14,0408.61%
Black2,25610.37%
Hispanic6977.08%
2+ Races1758.03%
Asian1253.98%
Native American11710.60%
Other Race1045.53%

St. Tammany Parish, Louisiana Veterans by Race

St. Tammany Parish, Louisiana Veterans by Education

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7.95%

Veteran Poverty Rate

33.43%

Veteran Disability Rate

St. Tammany Parish, Louisiana Veterans by Education

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62.5%

Labor Force Participation

58.8%

Employment Rate

5.5%

Unemployment Rate

St. Tammany Parish, Louisiana Employment by Age

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St. Tammany Parish, Louisiana Employment by Race

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St. Tammany Parish, Louisiana Employment by Education

Origin of Non-Citizens

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

Origin of Naturalized Citizens

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69.40%

Born in St. Tammany Parish, Louisiana

95.91%

Native Born

4.09%

Foreign Born

2.15%

Non Citizen

1.94%

Naturalized

Place of Birth

95.91% of St. Tammany Parish, Louisiana residents were born in the United States, with 69.40% having been born in Louisiana. 2.15% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

St. Tammany Parish, Louisiana Place of Birth

  1. US Census City/Town Population estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. Population of States and Counties of the United States: 1790 - 1990

Sources