Lake St. Louis, Missouri Population 2020

16,636

Lake St. Louis is a city located in Missouri. With a 2020 population of 16,636, it is the 46th largest city in Missouri and the 2142nd largest city in the United States. Lake St. Louis is currently growing at a rate of 1.24% annually and its population has increased by 14.38% since the most recent census, which recorded a population of 14,545 in 2010. Spanning over 9 miles, Lake St. Louis has a population density of 1,949 people per square mile.

The average household income in Lake St. Louis is $110,651 with a poverty rate of 3.92%. The median rental costs in recent years comes to $1,047 per month, and the median house value is $268,500. The median age in Lake St. Louis is 43.9 years, 42.3 years for males, and 45.3 years for females. For every 100 females there are 106.9 males.

Lake St. Louis Demographics

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

  • White: 93.21%
  • Two or more races: 2.29%
  • Black or African American: 2.26%
  • Asian: 1.56%
  • Native American: 0.34%
  • Other race: 0.23%
  • Native Hawaiian or Pacific Islander: 0.12%
The current population of Lake St. Louis, Missouri is 16,636, based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 16,230.The last official US Census in 2010 recorded the population at 14,545.

Lake St. Louis, Missouri Population 2020

Population by Race

Race Population Percentage
White14,58393.21%
Two or More Races3582.29%
Black or African American3532.26%
Asian2441.56%
American Indian and Alaska Native530.34%
Some Other Race360.23%
Native Hawaiian and Other Pacific Islander190.12%

Lake St. Louis Population Pyramid 2020

Lake St. Louis Median Age

43.9


Total

42.3


Male

45.3


Female

Lake St. Louis Adults

There are 12,329 adults, (3,230 of whom are seniors) in Lake St. Louis.

Lake St. Louis Age Dependency

72

Age Dependency Ratio

35.5

Old Age Dependency Ratio

36.5

Child Dependency Ratio

Lake St. Louis Sex Ratio

Female

7,561

48.33%

Male

8,085

51.67%

Lake St. Louis Households and Families

Lake St. Louis Renter vs Owner Occupied by Household Type

Lake St. Louis Household Types

Type Owner Renter
Married87.2%12.8%
Female81.8%18.2%
All80.2%19.8%
Male69.7%30.3%
Non Family66.1%33.9%

80.2%

Rate of Home Ownership

Type Count Average Size Owned
All6,0322.5980.2
Married3,7963.0487.2
Non Family1,7121.2166.1
Female2803.3781.8
Male2444.4169.7

3.08

Average Family Size

2.59

Average Household Size

6%

Unmarried (Opposite Sex)

1.4%

Unmarried (Same Sex)

Lake St. Louis Education

Education Attained Count Percentage
Less Than 9th Grade710.64%
9th to 12th Grade3092.79%
High School Graduate2,21419.99%
Some College2,39021.58%
Associates Degree1,17510.61%
Bachelors Degree3,18228.74%
Graduate Degree1,73215.64%

Lake St. Louis Educational Attainment by Race

Name Total High School Bachelors
White10,2289,9734,632
Hispanic398273105
Black28828854
Asian13213287
Native American361811
Multiple Races363636
Other Race272727
Islander199

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

The highest rate of bachelors degrees is among other race people with a rate of 100.00%.

Name Average Male Female
Overall$50,523$62,393$40,881
Less Than High School$$$
High School Grad$41,617$49,048$26,106
Some College$39,469$47,710$30,673
Bachelors Degree$66,750$111,205$43,125
Graduate Degree$74,205$106,786$62,645

$50,523

Average Earnings

$62,393

Average Male

$40,881

Average Female

Lake St. Louis Language

Lake St. Louis Language by Age

Lake St. Louis Language

95.32% of Lake St. Louis residents speak only English, while 4.68% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 2.78% of the population.

Lake St. Louis Poverty

Lake St. Louis Poverty by Race

Name Total In Poverty Poverty Rate
White14,0524122.93%
Hispanic68917925.98%
Multiple358236.42%
Black353215.95%

3.92%

Overall Poverty Rate

3.12%

Male Poverty Rate

4.76%

Female Poverty Rate

Poverty in Lake St. Louis

The race most likely to be in poverty in Lake St. Louis is Hispanic, with 25.98% below the poverty level.

The race least likely to be in poverty in Lake St. Louis is White, with 2.93% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 0.83%. Among those working part-time, it was 5.62%, and for those that did not work, the poverty rate was 7.17%.

Name Poverty
Less Than High School42.63%
High School3.39%
Bachelors or Greater2.24%
Some College1.74%
Name Poverty
Male Employed2.69%
Female Employed1.77%
Female Unemployed0.00%
Male Unemployed0.00%

Lake St. Louis Income

Lake St. Louis Income by Household Type

Name Median Mean
Households$88,750$110,651
Families$103,750$126,915
Married Families$107,250-
Non Families$53,526$64,849

Lake St. Louis Marital Status

Lake St. Louis Marital Status

Marriage Rates

59.6%

Overall Marriage Rate

57.8%

Male Marriage Rate

61.4%

Female Marriage Rate

Lake St. Louis Married by Age and Sex

Lake St. Louis Marriage

The age group where males are most likely to be married is 45-54, while the female age group most likely to be married is 55-64.

Lake St. Louis Marital Status by Race

Lake St. Louis Veterans

1,343

Number of Veterans

1,280

Male Veterans

63

Female Veterans

War Veterans
Vietnam558
First Gulf War226
Second Gulf War168
Korea149
World War II134
Age Group Veterans
65 to 74442
75+396
35 to 54215
55 to 64182
18 to 34108
Name Veterans % of Total
White1,24510.78%
Black9831.72%
Hispanic5710.22%

$Lake St. Louis Veterans by Education

0.00%

Veteran Poverty Rate

28.29%

Veteran Disability Rate

Lake St. Louis Employment Status

64.7%

Labor Force Participation

62.6%

Employment Rate

3.3%

Unemployment Rate

Lake St. Louis Place of Birth

Origin of Non-Citizens

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

Origin of Naturalized Citizens

58.88%

Born in Missouri

96.10%

Native Born

3.90%

Foreign Born

1.84%

Non Citizen

Place of Birth

96.10% of Lake St. Louis residents were born in the United States, with 58.88% having been born in Missouri. 1.84% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Europe.

Year Population Growth Annual Growth Rate
202016,6362031.24%
201916,4332031.25%
201816,2303041.91%
201715,9262031.29%
201615,7233872.52%
201515,3363202.13%
201415,0161761.19%
201314,840810.55%
201214,7591020.70%
201114,657370.25%
201014,6204,4513.70%
200010,1692,7693.23%
19907,4003,5576.77%
19803,8430.00%