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City ZIP codes · Missouri

Saint Joseph, MO ZIP Codes

8 ZIP codes use the postal name Saint Joseph, Missouri (Census 2020 ZCTAs and GeoNames postal codes, October 2026): 6 residential and 2 for PO boxes or a single organization. Median household income runs from $46,731 in 64501 to $73,298 in 64505, 1.6 times as much (Census Bureau, ACS 2020-2024). Saint Joseph's most populous ZIP code is 64506, with 21,461 people (ACS 2020-2024); 0% of its land is in the city of Saint Joseph.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are Saint Joseph's ZIP codes?

64501: $47k median household income64503: $53k median household income64504: $59k median household income64505: $73k median household income64506: $66k median household income64507: $61k median household income645076450564504645036450664501: $47k median household income64503: $53k median household income64504: $59k median household income64505: $73k median household income64506: $66k median household income64507: $61k median household income645076450564504645036450664501: $47k median household income64503: $53k median household income64504: $59k median household income64505: $73k median household income64506: $66k median household income64507: $61k median household income6450764505645046450364506
The 6 residential ZIP codes named Saint Joseph, 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 Saint Joseph's ZIP codes?

The highest median household income is in 64505 ($73,298), the lowest in 64501 ($46,731). Home values run from $98,600 in 64501 to $240,300 in 64506.

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

All 6 residential ZIP codes of Saint Joseph

Residential ZIP codes with the postal name Saint Joseph, MO, largest first (ACS 2020-2024); sort by any column
County
64506 Buchanan County 21,461 2,141 $66k $240k
64505 Andrew County 14,107 309 $73k $191k
64507 Buchanan County 13,991 251 $61k $140k
64503 Buchanan County 11,954 826 $53k $141k
64501 Buchanan County 10,689 2,879 $47k $99k
64504 Buchanan County 10,068 214 $59k $127k

Download the 8 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 Saint Joseph

2 ZIP codes named Saint Joseph 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.

Saint Joseph, 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
64502Buchanan County
64508Buchanan County

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

Which counties do Saint Joseph's ZIP codes reach?

Saint Joseph's residential ZIP codes lie in 2 counties: Buchanan County (5 ZIP codes mainly there), Andrew County (1 ZIP code mainly there).

Which places do Saint Joseph's ZIP codes cover?

A postal name is not a city limit. By the Census Bureau's places, Saint Joseph's residential ZIP codes cover 2 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 Saint Joseph'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 Saint Joseph starts with 645.

Three-digit prefixes of Saint Joseph'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 Saint Joseph's
PrefixSectional centerHereAll codes
645 Kansas City, MO (SCF 640) 8 8

All 8 ZIP codes that start with 645 are Saint Joseph's: 6 residential codes and 2 PO Box or unique codes, sorted at Kansas City, MO (SCF 640).

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