Lake St. Louis, Missouri Population 2022

17,139
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Lake St. Louis is a city located in St. Charles County Missouri. With a 2020 population of 17,139, it is the 51st largest city in Missouri and the 2639th largest city in the United States. Lake St. Louis is currently growing at a rate of 1.28% annually and its population has increased by 2.59% since the most recent census, which recorded a population of 16,707 in 2020. Spanning over 9 miles, Lake St. Louis has a population density of 2,008 people per square mile.

The average household income in Lake St. Louis is $114,193 with a poverty rate of 3.86%. The median rental costs in recent years comes to $1,139 per month, and the median house value is $284,000. The median age in Lake St. Louis is 45.4 years, 43.2 years for males, and 47 years for females.

Lake St. Louis Demographics

According to the most recent ACS, the racial composition of Lake St. Louiswas:

  • White: 90.49%
  • Two or more races: 4.46%
  • Black or African American: 2.83%
  • Asian: 1.57%
  • Other race: 0.52%
  • Native American: 0.13%
  • Native Hawaiian or Pacific Islander: 0.00%
The current population of Lake St. Louis, Missouri is 17,139 based on our projections of the latest US Census estimates.The last official US Census in 2020 recorded the population at 16,707.

Lake St. Louis, Missouri Population 2022

Population by Race

Race Population Percentage
White14,80190.49%
Black or African American4632.83%
American Indian and Alaska Native220.13%
Asian2561.57%
Some Other Race850.52%
Two or More Races7304.46%
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Lake St. Louis Population by Race

Lake St. Louis Population Pyramid 2022

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Lake St. Louis Median Age

45.1


Total

44.5


Male

45.6


Female

Lake St. Louis Adults

There are 13,129 adults, (3,421 of whom are seniors) in Lake St. Louis.

Lake St. Louis Age Dependency

Age Dependency Ratio

35.2

Old Age Dependency Ratio

33.3

Child Dependency Ratio

Lake St. Louis Sex Ratio

Female

8,187

50.05%

Male

8,170

49.95%

Lake St. Louis Population by Age

Lake St. Louis Renter vs Owner Occupied by Household Type

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Lake St. Louis Household Types

Type Owner Renter
Male100%0%
Married87.8%12.2%
All81.4%18.6%
Female73.5%26.5%
Non Family65.4%34.6%

81.4%

Rate of Home Ownership

Lake St. Louis Households and Families

Type Count Average Size Owned
All6,5572.4981.4
Married4,3412.8687.8
Male1504.45100
Female3283.2773.5
Non Family1,7381.2865.4

2.89

Average Family Size

2.49

Average Household Size

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Lake St. Louis Households by Type

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Education Attained Count Percentage
Less Than 9th Grade750.63%
9th to 12th Grade3883.27%
High School Graduate1,98516.73%
Some College2,63022.16%
Associates Degree1,19210.04%
Bachelors Degree3,56730.06%
Graduate Degree2,03017.11%
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Lake St. Louis Educational Attainment by Sex (over 25)

Lake St. Louis Educational Attainment by Race

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Race Total High School Bachelors
Other Race393939
Asian192192156
White10,83710,4985,184
2+ Races19319378
Hispanic415298119
Black26325660
Native American22

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 other race people with a rate of 100.00%.

Lake St. Louis Educational Attainment by Race

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Name Average Male Female
Overall$58,534$72,537$50,770
Less Than 9th Grade$$2,500$
High School Graduate$39,413$54,254$25,938
Some College$49,028$54,472$39,429
Bachelors Degree$67,002$86,845$57,232
Graduate Degree$89,675$105,900$71,875

$58,534

Average Earnings

$72,537

Average Male

$50,770

Average Female

Lake St. Louis Earnings by Educational Attainment

Lake St. Louis Language by Age

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Lake St. Louis Language

94.14% of Lake St. Louis residents speak only English, while 5.86% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 3.52% of the population.

Lake St. Louis Language

Lake St. Louis Poverty by Race

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Name Total In Poverty Poverty Rate
White14,3334913.43%
OtherNaN%
Hispanic70110815.41%
Multiple730466.30%

3.86%

Overall Poverty Rate

3.82%

Male Poverty Rate

3.91%

Female Poverty Rate

Poverty in Lake St. Louis

The race most likely to be in poverty in Lake St. Louis is White, with 3.43% below the poverty level.

The race least likely to be in poverty in Lake St. Louis is Multiple, with 6.30% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 0.94%. Among those working part-time, it was 3.73%, and for those that did not work, the poverty rate was 8.51%.

Lake St. Louis Poverty

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Name Poverty
Less Than 9th Grade49.46%
High School2.47%
Some College1.70%
Bachelors or Greater2.77%

Lake St. Louis Poverty Rate by Education

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Rate Poverty
Male Employed1.50%
Male Unemployed0.00%
Female Employed1.05%
Female Unemployed0.00%

Lake St. Louis Poverty Rate by Employment Status and Sex

Lake St. Louis Income by Household Type

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Name Median Mean
Households$100,122$116,262
Families$117,276$133,825
Married Families$122,151-
Non Families$46,596$63,415
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Income by Household Type

Lake St. Louis Marital Status

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Marriage Rates

62.5%

Overall Marriage Rate

63.6%

Male Marriage Rate

61.4%

Female Marriage Rate

Lake St. Louis Married by Age and Sex

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Lake St. Louis Marriage

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

Lake St. Louis Marital Status by Race

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Lake St. Louis Marital Status

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1,294

Number of Veterans

Male Veterans

Female Veterans

War Veterans
Second Gulf War123
First Gulf War183
Vietnam499
Korea147
World War II35

Lake St. Louis Veterans by War

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Age Group Veterans
18 to 3450
35 to 54194
55 to 64160
65 to 74347
75+543

Lake St. Louis Veterans by Age

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Name Veterans % of Total
White1,24310.36%
Black3910.99%
Asian83.83%
2+ Races40.78%

Lake St. Louis Veterans by Race

Lake St. Louis Veterans by Education

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9.66%

Veteran Poverty Rate

30.83%

Veteran Disability Rate

Lake St. Louis Veterans by Education

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62.7%

Labor Force Participation

60.1%

Employment Rate

4.2%

Unemployment Rate

Lake St. Louis Employment by Age

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Lake St. Louis Employment by Race

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Lake St. Louis 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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63.53%

Born in Lake St. Louis

95.98%

Native Born

4.02%

Foreign Born

1.49%

Non Citizen

2.52%

Naturalized

Place of Birth

95.98% of Lake St. Louis residents were born in the United States, with 63.53% having been born in Missouri. 1.49% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Europe.

Lake St. Louis Place of Birth

Note: 2021 and 2022 data is projected
Year Population Growth Annual Growth Rate
19803,8430.00%
19907,4003,5576.77%
200010,1692,7693.23%
201014,5454,3763.64%
201114,7612161.49%
201214,9772161.46%
201315,1932161.44%
201415,4092161.42%
201515,6252161.40%
201615,8412161.38%
201716,0572161.36%
201816,2732161.35%
201916,4892161.33%
202016,7072181.32%
202116,9232161.29%
202217,1392161.28%

Lake St. Louis Population by Year