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, Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White

Black or African American

Other race

Two or more races

Asian

Native American

Native Hawaiian or Pacific Islander

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%
Native American	0	0%
Native Hawaiian or Pacific Islander	0	0%

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