63121 ZIP Code — Saint Louis, MO

Saint Louis County, Missouri

ZIP code 63121 is located in Saint Louis, Missouri, within Saint Louis County. It covers approximately 6.77 square miles and serves a population of 24,126 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 314.

About ZIP code 63121

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1950s, giving the area an established character. Median home value is $89,800. Owner-occupancy sits near the national average at 51%.

Median household income is $39,668. Poverty affects 20% of residents, above the national average. SNAP benefit usage at 20% of households reflects economic stress in the area. 34% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 22 minutes is near the national average.

Educational attainment is near the national average, with 23% of residents holding a bachelor's degree or higher.

Health indicators show elevated rates of diabetes (16%), smoking (23%) compared to national benchmarks.

Overall, ZIP code 63121 reflects a community defined by economic challenges above the national average, a significant Social Security-dependent population, and elevated reliance on food assistance.

24,126

population

6.77

sq mi land

Standard

ZIP type

Central (CT)

timezone

63121 ZIP code map

Cities in ZIP code 63121

Below are the cities the US Postal Service accepts for ZIP code 63121. Using any city not on this list may result in mail delivery delays.

City	Status
Saint Louis	Acceptable
Saint Louis	Acceptable
Saint Louis	Preferred

Nearby ZIP codes

63133 Saint Louis (1.8 mi) 63140 Saint Louis (2.4 mi) 63120 Saint Louis (2.6 mi) 63135 Saint Louis (2.6 mi) 63130 Saint Louis (3.1 mi) 63114 Saint Louis (3.1 mi) 63134 Saint Louis (3.3 mi) 63112 Saint Louis (3.4 mi) 63136 Saint Louis (3.4 mi) 63115 Saint Louis (3.7 mi) 63105 Saint Louis (4.5 mi) 63132 Saint Louis (4.5 mi)

Demographics updated 06/2026

Population
Total population	24,126
Population density	3,564 / sq mi
State FIPS	29
County FIPS	189

Geography
Land area	6.77 sq mi
Water area	0.00 sq mi
Latitude	38.7074
Longitude	-90.3030
Timezone	Central (CT)
Area code	314

Total population by age

Gender

Race & ethnicity

Economics updated 06/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	61.3%	36.1%	43.8%
$50k – $100k	29.4%	30.6%	31.5%
$100k – $200k	8.2%	23.0%	19.5%
Over $200k	1.2%	10.4%	5.2%

Demographics & statistics

24,126

Population

3,564

People per sq mi

38.3

Median age

$39,668

Median household income

$25,454

Per capita income

$89,800

Median home value

$889

Median monthly rent

51.0%

Home ownership

20.4%

Poverty rate

8.6%

Unemployment

7,706

Housing units

22.8%

Bachelor's or higher

Age distribution

Male Female

656

Under 5

775

689

5–9

814

645

10–14

763

635

15–19

750

903

20–24

1,068

1,561

25–34

1,845

1,255

35–44

1,483

1,037

45–54

1,226

590

55–59

697

1,046

60–64

1,236

1,276

65–74

1,508

542

75–84

640

223

85+

263

← Male

Female →

Age summary

Group	Count	%
Under 18	4,893	20.3%
18 and over	19,233	79.7%
65 and over	4,452	18.5%
Median age	38.3 years

Race & ethnicity

Black or African American 81.4%

White 12.8%

Two or more races 2.3%

Hispanic or Latino 1.4%

Asian 1.1%

Other race 0.9%

American Indian / Alaska Native 0.1%

Group	Count	%
Black or African American	19,921	81.4%
White	3,135	12.8%
Two or more races	562	2.3%
Hispanic or Latino	334	1.4%
Asian	259	1.1%
Other race	227	0.9%
American Indian / Alaska Native	22	0.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	61.3%	36.1%	43.8%
$50k – $100k	29.4%	30.6%	31.5%
$100k – $200k	8.2%	23.0%	19.5%
Over $200k	1.2%	10.4%	5.2%

Under $10k 10.1%

$10k–$15k 5.4%

$15k–$25k 12.6%

$25k–$35k 14.5%

$35k–$50k 19.2%

$50k–$75k 16.3%

$75k–$100k 9.3%

$100k–$150k 8.6%

$150k–$200k 2.4%

$200k+ 1.5%

Range	% of households
Under $10k	10.1%
$10k–$15k	5.4%
$15k–$25k	12.6%
$25k–$35k	14.5%
$35k–$50k	19.2%
$50k–$75k	16.3%
$75k–$100k	9.3%
$100k–$150k	8.6%
$150k–$200k	2.4%
$200k+	1.5%
Median income	$39,668

Housing

Home values

Under $50k 17.4%

$50k–$100k 40.0%

$100k–$150k 16.4%

$150k–$200k 8.5%

$200k–$300k 12.0%

$300k–$500k 4.8%

$500k–$1M 0.8%

$1M+ 0.1%

Housing overview

Metric	Value
Median home value	$89,800
Median rent / month	$889
Owner occupied	51.0%
Renter occupied	49.0%
Vacant	15.1%
Single-family detached	76.2%
Large apartment buildings	4.9%
Mobile homes	1.4%
Median rooms	5.3
Avg household size (owned)	2.13

Year built

Era	%
2020 or later	0.0%
2010–2019	1.6%
2000–2009	5.0%
1990–1999	2.3%
1980–1989	1.3%
1970–1979	7.0%
1960–1969	14.3%
1950–1959	27.7%
1940–1949	17.8%
1939 or earlier	23.1%

Bedrooms

Size	% of units
No bedroom (studio)	1.4%
1 bedroom	15.8%
2 bedrooms	40.0%
3 bedrooms	32.5%
4 bedrooms	9.8%
5+ bedrooms	0.5%

Vehicles per household

Vehicles	% of households
No vehicle	12.1%
1 vehicle	52.5%
2 vehicles	26.3%
3 or more	9.1%

Heating fuel

Fuel type	%
Utility gas	84.9%
Electricity	13.4%
Propane / LP gas	0.8%
Fuel oil	0.3%
Solar	0.3%
No fuel used	0.3%

Households & families

Household type	Count	%
Married-couple family	2,210	19.7%
Cohabiting couple	316	2.8%
Male householder, no spouse	3,383	30.2%
Female householder, no spouse	5,295	47.3%
Households with children under 18	2,417	21.6%
Households with seniors (65+)	3,356	30.0%
Average household size	2.08

Marital status

Status	Male	Female
Never married	49.5%	46.3%
Married	27.9%	23.3%
Separated	6.8%	3.4%
Widowed	3.3%	11.1%
Divorced	12.5%	15.9%

Education

Less than 9th grade 2.5%

Some HS, no diploma 6.7%

HS graduate 34.7%

Some college, no degree 25.6%

Associate's degree 7.7%

Bachelor's degree 13.5%

Graduate / professional 9.3%

Metric	%
HS diploma or higher	90.8%
Bachelor's or higher	22.8%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	206	3.4%
Kindergarten	201	3.3%
Elementary school	2,404	39.8%
High school	875	14.5%
College / grad school	2,359	39.0%

Employment

Industry of employment

Education & healthcare 27.2%

Professional & management 11.0%

Manufacturing 10.2%

Retail trade 10.2%

Other services 9.2%

Arts, food & hospitality 7.9%

Transportation & utilities 7.8%

Finance & real estate 6.4%

Construction 4.6%

Public administration 3.2%

Information 1.1%

Wholesale trade 0.8%

Agriculture & mining 0.5%

Occupation

Category	%
Management, business & arts	30.1%
Service	24.6%
Sales & office	20.2%
Natural resources & construction	6.4%
Production & transportation	18.6%

Employment type

Type	%
Private sector	84.6%
Government	11.9%
Self-employed	3.5%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	77.5%
Carpool	5.2%
Public transit	4.8%
Walk	3.0%
Work from home	8.4%
Other means	1.1%
Avg commute (minutes)	22.2

Poverty

All people 20.4%

Under 18 years 28.8%

18 and over 18.2%

Married-couple families 5.2%

Female-led households 24.3%

Income support

Source	% of households
Social Security	33.6%
Retirement income	25.8%
Supplemental Security	7.5%
Cash public assistance	1.4%
Food stamps / SNAP	20.0%

Health indicators

Condition	%
Obesity	39.7%
High blood pressure	43.0%
High cholesterol	29.6%
Diabetes	15.8%
Heart disease	7.2%
Stroke	5.1%
Asthma	12.3%
Arthritis	29.0%
Kidney disease	4.0%
Pulmonary disease	8.6%
Cancer	5.6%

Behavior / access	%
Smoking	22.5%
Binge drinking	13.6%
No physical activity	34.4%
Less than 7 hrs sleep	40.6%
Depression	19.3%
Fair or poor health	25.1%
Poor mental health	17.1%
Poor physical health	14.1%
No health insurance	20.2%
Visited doctor (checkup)	81.4%
Visited dentist	50.5%
Cholesterol screening	88.8%
Teeth loss	23.2%

Veterans & disability

Veterans	Count	%
Civilian veterans	1,104	5.7%

Disability	%
Any disability	14.4%
Under 18	1.9%
18–64 years	12.9%
65 and over	34.0%

Health insurance coverage

Type	%
Private insurance	57.0%
Public insurance	44.2%
No insurance	10.8%
Uninsured under 19	3.6%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	22,695	94.1%
Spanish	83	0.4%
Other Indo-European	34	0.1%
Asian & Pacific Islander	0	0.0%
Other languages	38	0.2%

Place of birth & citizenship

Origin	Count	%
Native born (US)	23,623	97.9%
Born in same state	23,575	97.7%
Born in different state	18,964	78.6%
Foreign born	48	0.2%
Naturalized citizen	503	2.1%
Not a US citizen	146	29.0%

Ancestry

Ancestry	Count	%
Arab	1,782	7.4%
Italian	670	2.8%
French	334	1.4%
English	24	0.1%

Ancestry	Count	%
Dutch	19	0.1%
Irish	5	0%
Polish	4	0%
German	2	0%

Technology access

Metric	% of households
Computer access	46.4%
Internet access	89.9%

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

Frequently asked questions about ZIP code 63121

What city is ZIP code 63121 in?

ZIP code 63121 is primarily assigned to Saint Louis, Missouri.

What county is ZIP code 63121 in?

ZIP code 63121 falls within Saint Louis County, Missouri.

What is the poverty rate in ZIP code 63121?

20% of residents in ZIP code 63121 live below the poverty line, above the national average.

What is the typical home value in ZIP code 63121?

The median home value in ZIP code 63121 is $89,800.

What are the health statistics for ZIP code 63121?

Health data for ZIP code 63121 shows elevated rates of diabetes (16%) and smoking (23%) compared to national benchmarks.

What is the median household income in ZIP code 63121?

The median household income in ZIP code 63121 is $39,668, below the national median of ~$75,000.

What timezone is ZIP code 63121 in?

ZIP code 63121 observes the CST timezone.