Lake St. Louis, Missouri Population 2023

17,355

Lake St. Louis is a city located in St. Charles County Missouri. With a 2023 population of 17,355, it is the 50th largest city in Missouri and the 2623rd largest city in the United States.Lake St. Louis is currently growing at a rate of 1.26% annually and its population has increased by 3.88% 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 2,034 people per square mile.

The average household income in Lake St. Louis is $114,193 with a poverty rate of 4.58%. The median rental costs in recent years comes to - per month, and the median house value is -. The median age in Lake St. Louis is 45.1 years, 44.5 years for males, and 45.6 years for females.

Lake St. Louis Demographics

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

  • 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%
The current population of Lake St. Louis, Missouri is 17,355 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 2023

Population by Race

White

Two or more races

Black or African American

Asian

Other race

Native American

Native Hawaiian or Pacific Islander

Lake St. Louis Population by Race

Lake St. Louis Population Pyramid 2023

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

68.5

Age Dependency Ratio

35.2

Old Age Dependency Ratio

33.3

Child Dependency Ratio

Lake St. Louis Sex Ratio

Female8,18750.05%
Male8,17049.95%

Lake St. Louis Population by Age

Lake St. Louis Renter vs Owner Occupied by Household Type

2.89

Average Family Size

2.49

Average Household Size

81.4%

Rate of Home Ownership

Married

Male

Female

NonFamily

owner

renter

Lake St. Louis Households and Families

Male

Female

Less Than 9th Grade

9th to 12th Grade

High School Graduate

Some College

Associates Degree

Bachelors Degree

Graduate Degree

Lake St. Louis Educational Attainment by Sex (over 25)

Lake St. Louis Educational Attainment by Race

High School Graduation Rate

Bachelors Rate

The highest rate of high school graduation is among other race people with a rate of 100%.

The highest rate of bachelors degrees is among other race people with a rate of 100%.

Lake St. Louis Educational Attainment by Race

All

Male

Female

$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

Only English

Spanish

Other Indo-European Languages

Asian and Pacific Island Languages

Other Languages

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

rate

4.58%

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 Hispanic, with 23.38% below the poverty level.

The race least likely to be in poverty in Lake St. Louis is White, with 4.01% 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

Lake St. Louis Poverty Rate by Education

Lake St. Louis Poverty Rate by Employment Status and Sex

Lake St. Louis Income by Household Type

Households

Families

MarriedFamilies

NonFamilies

mean

median

Income by Household Type

Lake St. Louis Marital Status

Married

Widowed

Divorced

Separated

NeverMarried

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

male

female

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

Married

Widowed

Divorced

Separated

NeverMarried

Lake St. Louis Marital Status

Second Gulf War

First Gulf War

Vietnam

Korea

World War II

1,294

Number of Veterans

1,230

Male Veterans

64

Female Veterans

Lake St. Louis Veterans by War

Lake St. Louis Veterans by Age

count

Lake St. Louis Veterans by Race

Lake St. Louis Veterans by Education

Less Than 9th Grade

High School Graduate

Some College

Bachelors or Greater

9.66%

Veteran Poverty Rate

30.83%

Veteran Disability Rate

Lake St. Louis Veterans by Education

LaborForceParticipation

62.7%

Labor Force Participation

60.1%

Employment Rate

4.2%

Unemployment Rate

Lake St. Louis Employment by Age

LaborForceParticipation

Lake St. Louis Employment by Race

LaborForceParticipation

Lake St. Louis 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

62.2%

Born in Lake St. Louis

93.97%

Native Born

3.93%

Foreign Born

1.46%

Non Citizen

2.47%

Naturalized

Place of Birth

93.97% of Lake St. Louis residents were born in the United States, with 62.2% having been born in Missouri. 1.46% 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: data after 2020 is projected based on recent growth

Lake St. Louis Population by Year