Plain

County ZIP codes · Missouri · FIPS 29003

Andrew County, MO ZIP Codes

Andrew County, Missouri has 17 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 10 of the residential ones lie mainly in Andrew County and 7 mainly in a neighboring county; 10 cross the county line. Median household income ranges from $59,219 in 64463 (King City) to $73,298 in 64505 (Saint Joseph) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Andrew County?

64421 · Amazonia: $53k64423 · Barnard: $59k64427 · Bolckow: $63k64430 · Clarksdale: $76k64436 · Cosby: $114k64449 · Fillmore: $72k64455 · Graham: $54k64457 · Guilford: $62k64459 · Helena: $79k64463 · King City: $59k64480 · Rea: $116k64483 · Rosendale: $74k64485 · Savannah: $68k64494 · Union Star: $66k64505 · Saint Joseph: $73k64506 · Saint Joseph: $66k64507 · Saint Joseph: $61k644636448564494644236450764427644556450564449644306445764483644216448064436644596450664421 · Amazonia: $53k64423 · Barnard: $59k64427 · Bolckow: $63k64430 · Clarksdale: $76k64436 · Cosby: $114k64449 · Fillmore: $72k64455 · Graham: $54k64457 · Guilford: $62k64459 · Helena: $79k64463 · King City: $59k64480 · Rea: $116k64483 · Rosendale: $74k64485 · Savannah: $68k64494 · Union Star: $66k64505 · Saint Joseph: $73k64506 · Saint Joseph: $66k64507 · Saint Joseph: $61k644636448564494644236450764427644556450564449644306445764483644216448064436644596450664421 · Amazonia: $53k64423 · Barnard: $59k64427 · Bolckow: $63k64430 · Clarksdale: $76k64436 · Cosby: $114k64449 · Fillmore: $72k64455 · Graham: $54k64457 · Guilford: $62k64459 · Helena: $79k64463 · King City: $59k64480 · Rea: $116k64483 · Rosendale: $74k64485 · Savannah: $68k64494 · Union Star: $66k64505 · Saint Joseph: $73k64506 · Saint Joseph: $66k64507 · Saint Joseph: $61k64463644856449464423645076442764455645056444964430644576448364421644806443664459
The residential ZIP codes of Andrew County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024). <$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 its ZIP codes?

The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $61,158 and $65,573.

They carry 15 postal town names.

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

All 17 residential ZIP codes in Andrew County

10 ZIP codes lie mainly in Andrew County; 7 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Andrew County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
64505 Saint Joseph 14,107 309 $73k $191k 77%
64485 Savannah 7,998 74 $68k $200k 100%
64494 Union Star 1,163 21 $66k $144k 53%
64436 Cosby 873 29 $114k $254k 100%
64421 Amazonia 817 33 $53k $90k 100%
64483 Rosendale 591 18 $74k $189k 100%
64427 Bolckow 582 9 $63k $209k 82%
64459 Helena 507 21 $79k $171k 100%
64449 Fillmore 491 13 $72k $89k 100%
64480 Rea 329 13 $116k $257k 100%

Partly in Andrew County

Residential ZIP codes mainly in another county that reach at least 1% into Andrew County, by their share here
In this county
64430 Clarksdale 823 19 $76k $202k 16%
64457 Guilford 308 8 $62k $106k 14%
64455 Graham 292 5 $54k $102k 9%
64463 King City 1,349 10 $59k $161k 8%
64506 Saint Joseph 21,461 2,141 $66k $240k 4%
64423 Barnard 777 11 $59k $177k 2%
64507 Saint Joseph 13,991 251 $61k $140k 1%

Download the 17 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).

Which ZIP codes cross the county line?

10 ZIP codes of Andrew County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Andrew County and in the neighboring counties
ZIPIn AndrewElsewhere
645064%Buchanan County 96%
6450577%Buchanan County 23%
645071%Buchanan County 99%
644638%Gentry County 66%; DeKalb County 26%
6449453%DeKalb County 47%
6443016%DeKalb County 85%
644232%Nodaway County 98%
6442782%Nodaway County 18%
6445714%Nodaway County 86%
644559%Nodaway County 91%

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

Which first three digits do Andrew County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Andrew County's ZIP codes use 2 prefixes: 644 and 645.

Three-digit prefixes of Andrew County'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 Andrew County's
PrefixSectional centerHereAll codes
644 Kansas City, MO (SCF 640) 14 70
645 Kansas City, MO (SCF 640) 3 8

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