Postal Codes

63121 ZIP Code

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ZIP code 63121 covers Saint Louis, Missouri, with a population of about 24,571 and a median household income of $41,285.

Population
24,5713,629 per square mile
Median age
35.23.5 points below the US average
Median household income
$41,28540% below the Missouri median
Poverty rate
23.6%11.2 points above the US average
Typical home value
$88,008up 16.6% in five years
Median rent
$9386% below the Missouri median
Degree or higher
21.9%13.1 points below the US average
Homeownership
52.9%12.1 points below the US average
Time zone
Central UTC-06:00observes daylight saving time
Businesses
413

Where 63121 is

Saint Louis, Missouri — the area the Census Bureau draws for this ZIP code. ZIP codes are sets of delivery routes rather than areas, so this is the Census approximation of one, not a Postal Service boundary.

People and households

American Community Survey 2019–2023 five-year estimates

Population24,571
Median age35.2
Family households46.9%
Born outside the US2.4%
Speaks a language other than English at home4.4%
White (non-Hispanic)13.5%
Black (non-Hispanic)79.6%
Asian (non-Hispanic)1.6%
Hispanic or Latino1.7%
Veterans5.4%
Population by age
MaleFemale0-45-910-1415-1920-2425-3435-4445-5455-6465-7475-8485+
Income and poverty

American Community Survey 2019–2023 five-year estimates

Median household income$41,285
Income per person$25,648
Poverty rate23.6%
Households on SNAP or cash assistance22.4%

Household income distribution

Under $10k9.5%
$10–15k4.6%
$15–20k6.7%
$20–25k5.9%
$25–30k8.2%
$30–35k5.7%
$35–40k6.6%
$40–45k7.2%
$45–50k5.3%
$50–60k6.6%
$60–75k10.6%
$75–100k9.2%
$100–125k5.7%
$125–150k3.1%
$150–200k2.8%
$200k or more2.2%

Income as declared to the IRS

Filed returns rather than survey responses, so this counts tax units and not households.

Tax returns filed10,310
Mean adjusted gross income$41,084
Returns declaring $200,000 or more1.2%
Returns, under $25k43.5%
Returns, $25k–$50k30.8%
Returns, $50k–$75k12.9%
Returns, $75k–$100k5.7%
Returns, $100k–$200k5.8%
Returns, $200k or more1.2%
Housing

American Community Survey 2019–2023 five-year estimates

Median home value$93,900
Median gross rent$938
Rent as a share of household income33.3%
Owner-occupied52.9%
Vacant homes14.4%
Median year built1952

What the homes are

Detached house77.2%
Attached house0.9%
2 to 4 units4.6%
5 to 19 units12.2%
20 or more units3.8%
Mobile home1.4%
Home values and rents today

Zillow Home Value Index and Zillow Observed Rent Index, courtesy of Zillow. Monthly and current, where the Census figures above are a five-year average and are capped at $2,000,000.

Typical home value$88,008as of 2026-07
Typical home value, 1 yearup 0.2%
Typical home value, 5 yearsup 16.6%
Typical home value, 10 yearsup 109.7%
Typical asking rent$1,078as of 2026-07
Typical asking rent, 1 yearup 0.7%
Typical home value since 2000
200020132026$122,853$40,917

$86,583 in 2000 to $88,008 in 2026.

Typical asking rent
202220242026$1,078$835

$835 in 2022 to $1,078 in 2026.

Work, commuting and education

American Community Survey 2019–2023 five-year estimates

Unemployment rate12.1%
Bachelor's degree or higher21.9%
High school diploma or higher91.3%
Works from home9.3%
Drives to work alone73.4%
Takes public transport5.1%
Commutes 45 minutes or more6.6%
Health

CDC PLACES 2025 release, model-based estimates. These are modelled small-area estimates for adults, not counts of diagnosed cases.

Obesity43% 9.6 pts above the national average of 33.4%
Diagnosed diabetes19.9% 7.9 pts above the national average of 12%
Currently smokes20.7% 7.5 pts above the national average of 13.2%
High blood pressure49% 14.9 pts above the national average of 34.1%
Fair or poor general health30.8% 10.5 pts above the national average of 20.3%
No health insurance (18–64)11.1% same as the national average of 11.3%
Depression21.2% 0.7 pts below the national average of 21.9%
No leisure-time physical activity39.6% 14.2 pts above the national average of 25.4%
Arthritis32.1% 7 pts above the national average of 25.1%
Binge drinking11.7% 4.3 pts below the national average of 16%
Taking blood pressure medication81.9% 7.2 pts above the national average of 74.7%
Cancer (non-skin)5.9% 1.8 pts below the national average of 7.7%
Current asthma13.1% 2.7 pts above the national average of 10.4%
Coronary heart disease8.1% 1.9 pts above the national average of 6.2%
Routine check-up in past year82.2% 5.5 pts above the national average of 76.7%
Cholesterol screening84.4% 1.5 pts below the national average of 85.9%
Cognitive disability20.9% 6.1 pts above the national average of 14.8%
Colorectal screening66% 1.7 pts above the national average of 64.3%
COPD10% 3.4 pts above the national average of 6.6%
Visited a dentist50.2% 11.1 pts below the national average of 61.3%
Any disability44.8% 14.1 pts above the national average of 30.7%
Lacks emotional support28.6% 3.8 pts above the national average of 24.8%
Food insecurity31.5% 14.4 pts above the national average of 17.1%
Received food stamps30.5% 16.2 pts above the national average of 14.3%
Hearing disability7.1% same as the national average of 6.7%
High cholesterol36.6% same as the national average of 36.2%
Housing insecurity26.5% 12.7 pts above the national average of 13.8%
Independent living disability14.3% 5.9 pts above the national average of 8.4%
Lacks transport17.4% 8.2 pts above the national average of 9.2%
Loneliness38.9% 4.5 pts above the national average of 34.4%
Mammography use78.8% 2.9 pts above the national average of 75.9%
Poor mental health (14+ days)19.8% 3 pts above the national average of 16.8%
Mobility disability24.1% 10.1 pts above the national average of 14%
Poor physical health (14+ days)17.1% 3.6 pts above the national average of 13.5%
Self-care disability7.6% 3.6 pts above the national average of 4%
Utility shut-off threat21.7% 12.9 pts above the national average of 8.8%
Sleeps under 7 hours43% 6.6 pts above the national average of 36.4%
Stroke6.1% 2.7 pts above the national average of 3.4%
All natural teeth lost24.8% 11.8 pts above the national average of 13%
Vision disability9.8% 4.2 pts above the national average of 5.6%
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Business and employment

Census ZIP Code Business Patterns 2022

Business establishments413
People employed4,099
Annual payroll$340,148,000
Natural hazard risk

FEMA National Risk Index, estimated for this ZIP code from census tract data — the NRI is not published per ZIP.

Overall riskHigher than 86.6% of US census tracts
FEMA ratingRelatively Moderate to Relatively High across the 10 census tracts this ZIP code covers
Expected annual loss80.3 out of 100
Community resilience71.8 out of 100

By hazard

Score is out of 100 and is the area-weighted average across the census tracts this ZIP code covers. The rating beside it is the highest any one of those tracts carries.

Heat wave98.3Very High at its worst in this ZIP code
Hail93.7Relatively High at its worst in this ZIP code
Earthquake91.2Relatively High at its worst in this ZIP code
Ice storm78.3Relatively Moderate at its worst in this ZIP code
Cold wave77.5Relatively High at its worst in this ZIP code
Landslide70.9Very Low at its worst in this ZIP code
Winter weather70.9Relatively High at its worst in this ZIP code
Lightning69.7Relatively High at its worst in this ZIP code
Tornado65.3Relatively High at its worst in this ZIP code
River flooding45.6Relatively High at its worst in this ZIP code
Strong wind35.6Relatively Low at its worst in this ZIP code
Wildfire28.7Very Low at its worst in this ZIP code
Hurricane23.3Very Low at its worst in this ZIP code
Compared with Missouri and the United States

State and national columns are figures for those areas, not for this ZIP code. American Community Survey 2019–2023 five-year estimates

This ZIPMissouriUnited States
Median household income$41,285$68,920$78,538
Income per person$25,648$38,497$43,289
Poverty rate23.6%12.6%12.4%
Median home value$93,900$215,600$303,400
Median gross rent$938$996$1,348
Homeownership52.9%67.9%65%
Bachelor's degree or higher21.9%31.9%35%
Unemployment rate12.1%4.1%5.2%
Works from home9.3%11.6%13.5%
Born outside the US2.4%4.4%13.9%
Median age35.238.938.7
Climate

NOAA US Climate Normals 1991-2020, from the nearest weather station with a full year of records. The station and its distance are named above, because a station forty kilometres away describes somewhere else.

Weather stationST LOUIS LAMBERT INTL AP, MO US7.8 km away
Rain in a year42 in
Snow in a year17 in

Average high and low by month

January40.4°F / 23.8°F2.59 in rain, 5.7 in snow
February45.8°F / 27.6°F2.23 in rain, 4.3 in snow
March56.6°F / 36.7°F3.5 in rain, 2.3 in snow
April68°F / 47°F4.73 in rain, 0.2 in snow
May77.1°F / 57.9°F4.82 in rain
June85.9°F / 67.2°F4.49 in rain
July89.6°F / 71.1°F3.93 in rain
August88.3°F / 69.3°F3.38 in rain
September81.1°F / 60.9°F2.96 in rain
October69.2°F / 49.1°F3.15 in rain
November55.5°F / 37.4°F3.42 in rain, 0.9 in snow
December44.5°F / 28.5°F2.5 in rain, 3.2 in snow
Access to food

USDA Food Access Research Atlas, estimated for this ZIP code from census tract data. Each figure is the share of the ZIP code's land area that falls in a tract carrying that flag.

Low income and far from a supermarket24% of this ZIP code's area
Far from a supermarket24% of this ZIP code's area
No vehicle and far from a supermarket91% of this ZIP code's area
School districts

NCES Geographic Relationship File 2025, which states the association between each district and each ZIP code tabulation area directly. Elementary and secondary districts can cover the same ground, so shares need not total 100%.

This ZIP code is served by 2 school districts, so the address decides which one, not the ZIP code.

Normandy Schools Collaborative86.2% of this ZIP code's land area
Ferguson-Florissant R-II School District13.5% of this ZIP code's land area
Community and walkability

CDC/ATSDR Social Vulnerability Index 2022 and the EPA National Walkability Index, both estimated for this ZIP code from census tract data. Vulnerability figures are national percentile ranks, not measurements.

Overall social vulnerability68more vulnerable than 68% of US census tracts
Socioeconomic status75more vulnerable than 75% of US census tracts
Household characteristics49more vulnerable than 49% of US census tracts
Racial and ethnic minority status87more vulnerable than 87% of US census tracts
Housing type and transport54more vulnerable than 54% of US census tracts
Walkability12.4 out of 20Above average
Nearby ZIP codes

The closest ZIP codes by centre point, which is not the same as sharing a border.

63133 Saint Louis, MO3.3 km away
63136 Saint Louis, MO3.4 km away
63140 Saint Louis, MO3.8 km away
63120 Saint Louis, MO4.4 km away
63130 Saint Louis, MO4.7 km away
63135 Saint Louis, MO4.8 km away
63134 Saint Louis, MO5.1 km away
63114 Saint Louis, MO5.1 km away
Location, counties and time zone

County shares from Census 2020 ZCTA relationship files. Time zone from the USDOT National Transportation Atlas, which renders the boundaries written into 49 CFR Part 71.

St. Louis County100% of this ZIP code's land area
Time zoneCentral (UTC-06:00 standard)
Daylight saving timeObserved
Land area6.77 sq mi
Population density3,629 people per sq mi
Latitude, longitude38.7071, -90.3055

Figures are published for this ZIP code or its Census tabulation area unless a section says otherwise. Estimates whose margin of error made them unreliable are omitted rather than shown. Sources: US Census Bureau, CDC, IRS.

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