US location post office
ZIP Code 63021
- Zip Code: 63021
- Type: Standard
- Official USPS city name: Ballwin
- Official USPS State Code: MO
- Official State Name: Missouri
- ZCTA: TRUE
- Population: 57112.0
- Density: 1000.3
- Primary Official County Code: 29189
- Primary Official County Name: St. Louis
- Official County Name: St. Louis
- Official County Code: 29189
- Imprecise: FALSE
- Military: FALSE
- Timezone: America/Chicago (11:01 AM Sunday, May 05 2024-05-05 (GMT -0500))
- Geo Point: 38.5688, -90.54644
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