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City ZIP codes · Missouri

Ballwin, MO ZIP Codes

4 ZIP codes use the postal name Ballwin, Missouri (Census 2020 ZCTAs and GeoNames postal codes, October 2026): 2 residential and 2 for PO boxes or a single organization. Median household income runs from $120,177 in 63021 to $124,454 in 63011 (Census Bureau, ACS 2020-2024). Ballwin's most populous ZIP code is 63021, with 55,666 people (ACS 2020-2024); 17% of its land is in the city of Ballwin.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are Ballwin's ZIP codes?

63011: $125k median household income63021: $120k median household income630216301163011: $125k median household income63021: $120k median household income630216301163011: $125k median household income63021: $120k median household income6302163011
The 2 residential ZIP codes named Ballwin, shaded by median household income in national fifths (ACS 2020-2024). Select a ZIP to open it. <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are Ballwin's ZIP codes?

The highest median household income is in 63011 ($124,454), the lowest in 63021 ($120,177). Home values run from $349,500 in 63021 to $400,900 in 63011.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013, B25077, B01003).

All 2 residential ZIP codes of Ballwin

Residential ZIP codes with the postal name Ballwin, MO, largest first (ACS 2020-2024); sort by any column
County
63021 St. Louis County 55,666 2,551 $120k $350k
63011 St. Louis County 35,920 2,518 $125k $401k

Download the 4 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; 2023 Gazetteer land areas (2020 ZCTAs); town names from simplemaps US ZIP Codes (CC BY 4.0) and GeoNames (CC BY 4.0).

PO Box and single-organization ZIP codes in Ballwin

2 ZIP codes named Ballwin have no residential delivery area: post office boxes, or one organization (a large employer, an agency, a university) with its own code. The Census Bureau publishes no figures for them.

Ballwin, MO: ZIP codes without a residential area, for PO boxes or one organization (GeoNames postal codes; USPS does not publish openly which is which)
ZIPCounty
63022St. Louis County
63024St. Louis County

Source: GeoNames postal codes (CC BY 4.0); a ZIP code with no Census ZCTA has no residential delivery area.

Which counties do Ballwin's ZIP codes reach?

Ballwin's residential ZIP codes lie in St. Louis County.

Which places do Ballwin's ZIP codes cover?

A postal name is not a city limit. By the Census Bureau's places, Ballwin's residential ZIP codes cover Ballwin itself and 5 other places, each listed with the ZIP codes that have at least 5% of their land in it or hold most of the place:

Source: U.S. Census Bureau, 2020 ZCTA-to-place relationship file (shares of land).

Which first three digits do Ballwin's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Ballwin starts with 630.

Three-digit prefixes of Ballwin's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Ballwin's
PrefixSectional centerHereAll codes
630 St Louis, MO (SCF 630) 4 65

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.