Zip Code 63021
Ballwin, Missouri — St. Louis County
📍 ZIP code 63021 is in Ballwin, St. Louis County, Missouri.
ZIP code 63021 is located in Ballwin, St. Louis County, Missouri. It is a zip code in the Central (CST/CDT) Time Zone with an estimated population of 56,297. The area code for ZIP code 63021 is 314.
Quick Answer
Zip code 63021 is in Ballwin, Missouri (St. Louis County). It has a population of 56,297, median household income of $113,822, and median home value of $324,300.
Population
56,297
Income
$113,822
Home Value
$324,300
Climate
89°F / 22°F
About Zip Code 63021
Zip code 63021 is located in Ballwin, Missouri, within St. Louis County. Home to approximately 56,297 residents, this area sits at an elevation of 527 ft and falls within the Central (CST/CDT) timezone. The local area code is 314.
The median household income is $113,822 per year, which is above the national median of $70,784. Homes in this zip code have a median value of $324,300, and the cost of living index is 124 (24% above the national average of 100).
Summers average a high of 89°F while winters drop to 22°F. The area receives about 42 in of rain and 8 in of snow annually. The zip code covers 22 square miles of land area and 0.2 square miles of water.
Key Statistics
56,297
$113,822
$324,300
Central (CST/CDT)
314
527 ft
22 sq mi
40.4
22,982
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Compare With Nearby Zip Codes
| Metric | 63021 | 63011 | 63088 | 63040 | 63017 | 63049 |
|---|---|---|---|---|---|---|
| City | Ballwin, MO | Ballwin, MO | Valley Park, MO | Wildwood, MO | Chesterfield, MO | Fenton, MO |
| Population | 56,297 | 36,274 | 8,423 | 8,826 | 43,074 | 17,480 |
| Median Income | $113,822 | $121,941 | $62,023 | $130,139 | $128,750 | $90,234 |
| Home Value | $324,300 | $373,600 | $231,700 | $408,800 | $452,000 | $209,200 |
| Cost of Living | 124 | 141 | 79 | 149 | 162 | 86 |
| Median Age | 40.4 | 44 | 39 | 42.3 | 47.6 | 43 |
Cost of Living
100 = National Average. Ballwin's cost of living is 24% above the national average.
vs. State Avg
Above
Affordability
Expensive
Income-to-Home
2.8x
Demographics
Zip code 63021 has a population of 56,297 people with a median age of 40.4. There are 22,982 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Ballwin (63021) population trend from 2010 to 2024
↓ -14.7%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
89°F
22°F
42 in
8 in
Ballwin experiences warm summers with average highs around 89°F. Winters are cool with lows averaging 22°F. The area receives about 8 in of snow per year.
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Housing & Economy
Median Home Value
$324,300
Median Household Income
$113,822
With 22,982 housing units across 22 square miles, 63021 has a housing density of 1,045 units per square mile. The home price-to-income ratio is 2.8x.
Location & Geography
Latitude
38.5698°
Longitude
-90.5457°
Land Area
22 sq mi
Water Area
0.2 sq mi
Nearby Zip Codes
Zip codes closest to 63021 (Ballwin, MO) with distances:
All Zip Codes in Ballwin, MO
Other zip codes serving Ballwin:
ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 63021's $113,822. A way to compare Ballwin to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 63021 (Ballwin, MO). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
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People Also Ask
What zip code is Ballwin, Missouri?
Ballwin, Missouri uses zip code 63021 along with 1 other zip codes.
What county is zip code 63021 in?
Zip code 63021 is located in St. Louis County, Missouri.
What is the population of zip code 63021?
The population of zip code 63021 is 56,297 with a median age of 40.4.
Is 63021 in Ballwin, Missouri?
Yes, zip code 63021 is in Ballwin, St. Louis County, Missouri. The area code is 314.
Frequently Asked Questions
What city is zip code 63021 in?
Zip code 63021 is in Ballwin, Missouri. It is part of St. Louis County and uses the Central (CST/CDT) timezone.
What is zip code 63021?
Zip code 63021 is a U.S. postal code in Ballwin, Missouri (St. Louis County). It has a population of 56,297 and covers 22 square miles.
What is the population of zip code 63021?
The population of zip code 63021 (Ballwin, MO) is 56,297 with a median age of 40.4. There are approximately 22,982 housing units in this area.
What is the median income in zip code 63021?
The median household income in zip code 63021 (Ballwin, MO) is $113,822 per year. The cost of living index is 124 (100 = national average).
What is the average home price in zip code 63021?
The median home value in zip code 63021 (Ballwin, MO) is $324,300. The cost of living index is 124 compared to the national average of 100.
What county is zip code 63021 in?
Zip code 63021 is located in St. Louis County, Missouri. The primary city is Ballwin.
What is the area code for zip code 63021?
Zip code 63021 in Ballwin, MO uses area code 314. It is located in the Central (CST/CDT) timezone.
Is zip code 63021 a good place to live?
Zip code 63021 (Ballwin, MO) has a cost of living index of 124 (100 = national average), a median household income of $113,822, and median home values of $324,300. The median age is 40.4. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 63021?
The cost of living index for zip code 63021 (Ballwin, MO) is 124, where 100 represents the national average. This area is above the national average. Median home value: $324,300.
What schools serve zip code 63021?
Zip code 63021 in Ballwin, Missouri is served by the local school district of St. Louis County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
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Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.