St. John

County:: St. Louis County
County Seat:: No
Area (mi²):: 1.424
State:: Missouri

St. John is a city located in St. Louis County, Missouri. St. John has a 2025 population of 6,347. St. John is currently declining at a rate of -0.87% annually and its population has decreased by -4.25% since the most recent census, which recorded a population of 6,629 in 2020.

The average household income in St. John is $63,376 with a poverty rate of 13.97%.The median age in St. John is 38.7 years: 38.6 years for males, and 38.9 years for females.

Demographics

The racial composition of St. John includes 41.37% White, 37.7% Black or African American, 13.85% other race, and smaller percentages for Asian and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	2,715	41.37%
Black or African American	2,474	37.7%
Other race	909	13.85%
Two or more races	319	4.86%
Asian	145	2.21%

St. John Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

St. John's average per capita income is $39,554. Household income levels show a median of $50,429. The poverty rate stands at 13.97%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.

Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.

Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.

Name	Median	Mean
Married Families	$52,410	-
Families	$51,943	$71,760
Households	$50,429	$63,376
Non Families	$40,716	$47,060

$39,554

Average Income

$50,429

Median Household Income

13.97%

Poverty Rate