Slidell, Louisiana Population 2021

27,359
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Slidell is a city located in St. Tammany Parish Louisiana. With a 2020 population of 27,359, it is the 13th largest city in Louisiana and the 1405th largest city in the United States . Slidell is currently declining at a rate of -0.50% annually but its population has increased by 1.08% since the most recent census, which recorded a population of 27,068 in 2010. Slidell reached it's highest population of in . Spanning over 16 miles, Slidell has a population density of 1,785 people per square mile.

The average household income in Slidell is $71,446 with a poverty rate of 15.15%. The median rental costs in recent years comes to $1,042 per month, and the median house value is $161,700. The median age in Slidell is 36.7 years, 36 years for males, and 37.5 years for females.

Slidell Demographics

According to the most recent ACS, the racial composition of Slidellwas:

  • White: 76.67%
  • Black or African American: 17.02%
  • Two or more races: 2.43%
  • Asian: 2.20%
  • Other race: 1.03%
  • Native American: 0.65%
  • Native Hawaiian or Pacific Islander: 0.00%
The current population of Slidell, Louisiana is 27,359 based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 27,633.The last official US Census in 2010 recorded the population at 27,068.

Slidell, Louisiana Population 2021

Population by Race

Race Population Percentage
White21,33076.67%
Black or African American4,73517.02%
Two or More Races6762.43%
Asian6132.20%
Some Other Race2861.03%
American Indian and Alaska Native1820.65%
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Slidell Population by Race

Slidell Population Pyramid $2021

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Slidell Median Age

36.7


Total

36


Male

37.5


Female

Slidell Adults

There are 20,379 adults, (4,432 of whom are seniors) in Slidell.

Slidell Age Dependency

74.5

Age Dependency Ratio

27.8

Old Age Dependency Ratio

46.7

Child Dependency Ratio

Slidell Sex Ratio

Female

15,000

53.91%

Male

12,822

46.09%

Slidell Population by Age

Slidell Renter vs Owner Occupied by Household Type

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Slidell Household Types

Type Owner Renter
Female53.4%46.6%
Male57%43%
Non Family58.9%41.1%
All68.6%31.4%
Married85.6%14.4%

68.6%

Rate of Home Ownership

Slidell Households and Families

Type Count Average Size Owned
All9,8182.7968.6
Married3,9723.3985.6
Non Family3,3881.3658.9
Female1,7673.6453.4
Male6914.1857

3.37

Average Family Size

2.79

Average Household Size

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Slidell Households by Type

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Education Attained Count Percentage
Less Than 9th Grade6223.40%
9th to 12th Grade1,3197.22%
High School Graduate5,87932.17%
Some College4,62125.29%
Associates Degree1,2386.77%
Bachelors Degree3,09816.95%
Graduate Degree1,4988.20%
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Slidell Educational Attainment by Sex (over 25)

Slidell Educational Attainment by Race

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Race Total High School Bachelors
White13,61712,5053,501
Black2,9932,599745
Hispanic1,160731140
Asian436436170
2+ Races21220348
Other Race2096439
Native American1151094

The highest rate of high school graduation is among asian people with a rate of 100.00%.

The highest rate of bachelors degrees is among asian people with a rate of 38.99%.

Slidell Educational Attainment by Race

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Name Average Male Female
Overall$36,584$47,584$31,297
Less Than 9th Grade$24,012$33,977$12,188
High School Graduate$34,017$43,961$30,373
Some College$35,089$47,188$26,989
Bachelors Degree$47,885$49,583$41,667
Graduate Degree$55,184$73,365$47,778

$36,584

Average Earnings

$47,584

Average Male

$31,297

Average Female

Slidell Earnings by Educational Attainment

Slidell Language by Age

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Slidell Language

92.62% of Slidell residents speak only English, while 7.38% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 5.51% of the population.

Slidell Language

Slidell Poverty by Race

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Name Total In Poverty Poverty Rate
White19,5702,41912.36%
Black4,65194320.28%
Hispanic1,93948124.81%
Multiple66518127.22%
Native17611665.91%
Asian613233.75%

15.15%

Overall Poverty Rate

12.19%

Male Poverty Rate

17.68%

Female Poverty Rate

Poverty in Slidell

The race most likely to be in poverty in Slidell is Native, with 65.91% below the poverty level.

The race least likely to be in poverty in Slidell is Asian, with 3.75% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 3.03%. Among those working part-time, it was 23.40%, and for those that did not work, the poverty rate was 21.38%.

Slidell Poverty

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Name Poverty
Less Than 9th Grade32.19%
High School13.54%
Some College9.98%
Bachelors or Greater7.22%

Slidell Poverty Rate by Education

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Rate Poverty
Male Unemployed56.86%
Female Unemployed39.46%
Female Employed11.78%
Male Employed3.11%

Slidell Poverty Rate by Employment Status and Sex

Slidell Income by Household Type

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Name Median Mean
Households$54,906$71,446
Families$66,447$81,272
Married Families$83,434-
Non Families$32,413$44,901
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Income by Household Type

Slidell Marital Status

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Marriage Rates

39.7%

Overall Marriage Rate

44.3%

Male Marriage Rate

35.9%

Female Marriage Rate

Slidell Married by Age and Sex

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Slidell 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 35-44.

Slidell Marital Status by Race

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Slidell Marital Status

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1,938

Number of Veterans

1,647

Male Veterans

291

Female Veterans

War Veterans
Vietnam601
Second Gulf War597
First Gulf War477
Korea179
World War II46

Slidell Veterans by War

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Age Group Veterans
35 to 54600
75+427
65 to 74387
55 to 64265
18 to 34259

Slidell Veterans by Age

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Name Veterans % of Total
White1,5469.80%
Black2527.31%
Hispanic15311.65%
Asian10323.15%
Native American2420.87%
2+ Races136.13%

Slidell Veterans by Race

Slidell Veterans by Education

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8.62%

Veteran Poverty Rate

35.58%

Veteran Disability Rate

Slidell Veterans by Education

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62.3%

Labor Force Participation

57.2%

Employment Rate

7%

Unemployment Rate

Slidell Employment by Age

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Slidell Employment by Race

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Slidell 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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65.96%

Born in Slidell

95.79%

Native Born

4.21%

Foreign Born

2.05%

Non Citizen

2.15%

Naturalized

Place of Birth

95.79% of Slidell residents were born in the United States, with 65.96% having been born in Louisiana. 2.05% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.

Slidell Place of Birth

Note: 2020 and 2021 data is projected
Year Population Growth Annual Growth Rate
202127,359-137-0.50%
202027,496-137-0.50%
201927,633-137-0.49%
201827,770-141-0.51%
201727,911-18-0.06%
201627,929530.19%
201527,8762330.84%
201427,643790.29%
201327,564930.34%
201227,471280.10%
201127,4431280.47%
201027,3151,6200.61%
200025,6951,5710.63%
199024,124-2,594-1.02%
198026,71810,6175.20%
197016,1019,7459.74%
19606,3562,8926.26%
19503,4646001.92%
19402,864570.20%
19302,807-151-0.52%
19202,9580.00%

Slidell Population by Year