63021 ZIP Code — Ballwin, MO

Saint Louis County, Missouri

ZIP code 63021 is located in Ballwin, Missouri, within Saint Louis County. It covers approximately 21.82 square miles and serves a population of 55,944 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 636.

About ZIP code 63021

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1970s, giving the area an established character. Median home value is $308,700. Owner-occupancy is high at 79%, well above the national average.

Median household income is $108,854. The poverty rate of 4% is below the national average.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 25 minutes is near the national average.

Educational attainment is high — 60% of residents hold a bachelor's degree or higher, well above the national average of 33%.

Overall, ZIP code 63021 reflects a community defined by a highly educated population and high homeownership.

55,944

population

21.82

sq mi land

Standard

ZIP type

Central (CT)

timezone

63021 ZIP code map

Cities in ZIP code 63021

Below are the cities the US Postal Service accepts for ZIP code 63021. Using any city not on this list may result in mail delivery delays.

City	Status
Ballwin	Acceptable
Ballwin	Acceptable
Ballwin	Preferred

Nearby ZIP codes

63088 Valley Park (1.7 mi) 63011 Ballwin (3 mi) 63040 Wildwood (5.3 mi) 63131 Saint Louis (6 mi) 63026 Fenton (6 mi) 63122 Saint Louis (6 mi) 63049 High Ridge (6.3 mi) 63099 Fenton (6.4 mi) 63025 Eureka (6.8 mi) 63127 Saint Louis (7.1 mi) 63038 Wildwood (7.3 mi) 63017 Chesterfield (7.4 mi)

Demographics updated 07/2026

Population
Total population	55,944
Population density	2,564 / sq mi
State FIPS	29
County FIPS	189

Geography
Land area	21.82 sq mi
Water area	0.16 sq mi
Latitude	38.5647
Longitude	-90.5345
Timezone	Central (CT)
Area code	636

Total population by age

Gender

Race & ethnicity

Economics updated 07/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	23.3%	36.1%	43.8%
$50k – $100k	30.9%	30.6%	31.5%
$100k – $200k	31.6%	23.0%	19.5%
Over $200k	14.2%	10.4%	5.2%

Demographics & statistics

55,944

Population

2,564

People per sq mi

40.3

Median age

$108,854

Median household income

$52,775

Per capita income

$308,700

Median home value

$1,260

Median monthly rent

79.3%

Home ownership

4.2%

Poverty rate

3.3%

Unemployment

1,610

Housing units

60.4%

Bachelor's or higher

Age distribution

Male Female

1,567

Under 5

1,640

1,564

5–9

1,636

1,805

10–14

1,888

1,770

15–19

1,851

1,387

20–24

1,450

3,566

25–34

3,730

3,477

35–44

3,638

3,828

45–54

4,005

1,651

55–59

1,728

2,049

60–64

2,144

2,893

65–74

3,027

1,260

75–84

1,319

523

85+

548

← Male

Female →

Age summary

Group	Count	%
Under 18	12,478	22.3%
18 and over	43,466	77.7%
65 and over	9,570	17.1%
Median age	40.3 years

Race & ethnicity

White 75.2%

Asian 9.7%

Two or more races 7.2%

Hispanic or Latino 5.1%

Black or African American 2.1%

Other race 0.5%

American Indian / Alaska Native 0.2%

Group	Count	%
White	44,346	75.2%
Asian	5,698	9.7%
Two or more races	4,219	7.2%
Hispanic or Latino	3,017	5.1%
Black or African American	1,249	2.1%
Other race	292	0.5%
American Indian / Alaska Native	127	0.2%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	23.3%	36.1%	43.8%
$50k – $100k	30.9%	30.6%	31.5%
$100k – $200k	31.6%	23.0%	19.5%
Over $200k	14.2%	10.4%	5.2%

Under $10k 1.7%

$10k–$15k 1.4%

$15k–$25k 4.5%

$25k–$35k 4.9%

$35k–$50k 6.7%

$50k–$75k 14.8%

$75k–$100k 11.9%

$100k–$150k 22.3%

$150k–$200k 14.1%

$200k+ 17.6%

Range	% of households
Under $10k	1.7%
$10k–$15k	1.4%
$15k–$25k	4.5%
$25k–$35k	4.9%
$35k–$50k	6.7%
$50k–$75k	14.8%
$75k–$100k	11.9%
$100k–$150k	22.3%
$150k–$200k	14.1%
$200k+	17.6%
Median income	$108,854

Housing

Home values

Under $50k 1.3%

$50k–$100k 0.8%

$100k–$150k 3.4%

$150k–$200k 9.7%

$200k–$300k 32.6%

$300k–$500k 40.2%

$500k–$1M 11.7%

$1M+ 0.3%

Housing overview

Metric	Value
Median home value	$308,700
Median rent / month	$1,260
Owner occupied	79.3%
Renter occupied	20.7%
Vacant	3.5%
Single-family detached	72.2%
Large apartment buildings	3.8%
Mobile homes	0.0%
Median rooms	6.7
Avg household size (owned)	2.66

Year built

Era	%
2020 or later	0.1%
2010–2019	3.3%
2000–2009	9.8%
1990–1999	18.0%
1980–1989	24.0%
1970–1979	29.6%
1960–1969	9.3%
1950–1959	4.4%
1940–1949	0.6%
1939 or earlier	0.9%

Bedrooms

Size	% of units
No bedroom (studio)	0.4%
1 bedroom	6.5%
2 bedrooms	17.9%
3 bedrooms	38.9%
4 bedrooms	31.3%
5+ bedrooms	5.0%

Vehicles per household

Vehicles	% of households
No vehicle	2.9%
1 vehicle	28.3%
2 vehicles	47.7%
3 or more	21.2%

Heating fuel

Fuel type	%
Utility gas	75.7%
Electricity	22.9%
Propane / LP gas	0.9%
Fuel oil	0.3%
No fuel used	0.1%

Households & families

Household type	Count	%
Married-couple family	13,280	60.1%
Cohabiting couple	842	3.8%
Male householder, no spouse	3,010	13.6%
Female householder, no spouse	4,964	22.5%
Households with children under 18	7,328	33.2%
Households with seniors (65+)	6,811	30.8%
Average household size	2.52

Marital status

Status	Male	Female
Never married	28.3%	22.9%
Married	62.4%	57.7%
Separated	0.6%	1.4%
Widowed	1.8%	7.4%
Divorced	6.9%	10.6%

Education

Less than 9th grade 0.9%

Some HS, no diploma 1.8%

HS graduate 13.0%

Some college, no degree 16.6%

Associate's degree 7.4%

Bachelor's degree 36.4%

Graduate / professional 24.0%

Metric	%
HS diploma or higher	97.4%
Bachelor's or higher	60.4%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	804	5.9%
Kindergarten	689	5.0%
Elementary school	5,544	40.6%
High school	3,119	22.8%
College / grad school	3,512	25.7%

Employment

Industry of employment

Education & healthcare 25.1%

Professional & management 15.7%

Finance & real estate 11.5%

Retail trade 11.0%

Manufacturing 10.7%

Arts, food & hospitality 6.5%

Construction 5.5%

Other services 3.5%

Public administration 3.0%

Transportation & utilities 2.6%

Wholesale trade 2.4%

Information 2.2%

Agriculture & mining 0.2%

Occupation

Category	%
Management, business & arts	59.7%
Service	10.1%
Sales & office	19.5%
Natural resources & construction	5.2%
Production & transportation	5.6%

Employment type

Type	%
Private sector	87.3%
Government	9.1%
Self-employed	3.5%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	78.2%
Carpool	4.6%
Public transit	0.3%
Walk	0.4%
Work from home	15.9%
Other means	0.6%
Avg commute (minutes)	24.6

Poverty

All people 4.2%

Under 18 years 4.8%

18 and over 4.0%

Married-couple families 2.1%

Female-led households 9.4%

Income support

Source	% of households
Social Security	28.4%
Retirement income	25.9%
Supplemental Security	2.8%
Cash public assistance	0.9%
Food stamps / SNAP	1.7%

Health indicators

Condition	%
Obesity	24.8%
High blood pressure	26.6%
High cholesterol	29.4%
Diabetes	7.0%
Heart disease	4.8%
Stroke	2.1%
Asthma	8.5%
Arthritis	22.3%
Kidney disease	2.2%
Pulmonary disease	4.9%
Cancer	6.4%

Behavior / access	%
Smoking	12.5%
Binge drinking	19.3%
No physical activity	17.5%
Less than 7 hrs sleep	28.1%
Depression	19.7%
Fair or poor health	10.0%
Poor mental health	12.8%
Poor physical health	7.9%
No health insurance	10.1%
Visited doctor (checkup)	74.6%
Visited dentist	73.1%
Cholesterol screening	91.1%
Teeth loss	7.5%

Veterans & disability

Veterans	Count	%
Civilian veterans	2,242	5.2%

Disability	%
Any disability	9.0%
Under 18	2.9%
18–64 years	7.3%
65 and over	23.4%

Health insurance coverage

Type	%
Private insurance	83.2%
Public insurance	21.3%
No insurance	4.9%
Uninsured under 19	2.8%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	52,737	94.3%
Spanish	1,751	3.3%
Other Indo-European	383	0.7%
Asian & Pacific Islander	531	1.0%
Other languages	725	1.4%

Place of birth & citizenship

Origin	Count	%
Native born (US)	50,213	89.8%
Born in same state	49,732	88.9%
Born in different state	34,380	61.5%
Foreign born	481	0.9%
Naturalized citizen	5,731	10.2%
Not a US citizen	3,290	57.4%

Ancestry

Ancestry	Count	%
Italian	8,863	15.8%
French	6,168	11%
Arab	2,478	4.4%
English	453	0.8%

Ancestry	Count	%
Polish	416	0.7%
Irish	266	0.5%
German	160	0.3%
Dutch	155	0.3%

Technology access

Metric	% of households
Computer access	39.5%
Internet access	97.4%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 63021

What part of Ballwin is ZIP code 63021?

ZIP code 63021 covers a portion of Ballwin, Missouri, within Saint Louis County.

What county is ZIP code 63021 in?

ZIP code 63021 falls within Saint Louis County, Missouri.

How educated is the population of ZIP code 63021?

60% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

What is the median household income in ZIP code 63021?

The median household income in ZIP code 63021 is $108,854, above the national median of ~$75,000.

What is the typical home value in ZIP code 63021?

The median home value in ZIP code 63021 is $308,700.

What is the population of ZIP code 63021?

ZIP code 63021 has an estimated population of 55,944 residents, with a density of 2,564 people per square mile.

What timezone is ZIP code 63021 in?

ZIP code 63021 observes the CST timezone.