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City ZIP codes · Missouri

Florissant, MO ZIP Codes

4 ZIP codes use the postal name Florissant, Missouri (Census 2020 ZCTAs and GeoNames postal codes, October 2026): 3 residential and 1 for PO boxes or a single organization. Median household income runs from $66,776 in 63033 to $103,905 in 63034, 1.6 times as much (Census Bureau, ACS 2020-2024). Florissant's most populous ZIP code is 63031, with 50,196 people (ACS 2020-2024); 53% of its land is in the city of Florissant.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are Florissant's ZIP codes?

63031: $71k median household income63033: $67k median household income63034: $104k median household income63031630346303363031: $71k median household income63033: $67k median household income63034: $104k median household income63031630346303363031: $71k median household income63033: $67k median household income63034: $104k median household income630316303463033
The 3 residential ZIP codes named Florissant, 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 Florissant's ZIP codes?

The highest median household income is in 63034 ($103,905), the lowest in 63033 ($66,776). Home values run from $154,300 in 63031 to $239,300 in 63034.

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

All 3 residential ZIP codes of Florissant

Residential ZIP codes with the postal name Florissant, MO, largest first (ACS 2020-2024); sort by any column
County
63031 St. Louis County 50,196 3,333 $71k $154k
63033 St. Louis County 43,056 3,544 $67k $174k
63034 St. Louis County 18,908 1,009 $104k $239k

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 Florissant

1 ZIP code named Florissant has 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.

Florissant, 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
63032St. 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 Florissant's ZIP codes reach?

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

Which places do Florissant's ZIP codes cover?

A postal name is not a city limit. By the Census Bureau's places, Florissant's residential ZIP codes cover Florissant itself and 3 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 Florissant'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 Florissant starts with 630.

Three-digit prefixes of Florissant'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 Florissant'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.