Plain

County ZIP codes · Missouri · FIPS 29079

Grundy County, MO ZIP Codes

Grundy County, Missouri has 7 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 4 of the residential ones lie mainly in Grundy County and 3 mainly in a neighboring county; 7 cross the county line. Median household income ranges from $52,109 in 64683 (Trenton) to $74,821 in 64648 (Jamesport) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Grundy County?

64635 · Chula: $78k64641 · Galt: $50k64642 · Gilman City: $64k64648 · Jamesport: $75k64652 · Laredo: $59k64679 · Spickard: $54k64683 · Trenton: $52k6468364648646426467964641646356465264635 · Chula: $78k64641 · Galt: $50k64642 · Gilman City: $64k64648 · Jamesport: $75k64652 · Laredo: $59k64679 · Spickard: $54k64683 · Trenton: $52k6468364648646426467964641646356465264635 · Chula: $78k64641 · Galt: $50k64642 · Gilman City: $64k64648 · Jamesport: $75k64652 · Laredo: $59k64679 · Spickard: $54k64683 · Trenton: $52k64683646486464264679646416463564652
The residential ZIP codes of Grundy 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?

They carry 7 postal town names: Trenton, Jamesport, Spickard, Gilman City, Galt, Chula, Laredo.

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

All 7 residential ZIP codes in Grundy County

4 ZIP codes lie mainly in Grundy County; 3 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Grundy County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
64683 Trenton 7,631 33 $52k $110k 92%
64679 Spickard 921 10 $54k $118k 88%
64641 Galt 625 8 $50k $138k 79%
64652 Laredo 346 8 $59k $176k 97%

Partly in Grundy County

Residential ZIP codes mainly in another county that reach at least 1% into Grundy County, by their share here
In this county
64648 Jamesport 2,396 21 $75k $108k 15%
64642 Gilman City 804 7 $64k $95k 12%
64635 Chula 508 8 $78k $140k 10%

Download the 7 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?

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

Share of each ZIP code's land in Grundy County and in the neighboring counties
ZIPIn GrundyElsewhere
6468392%Livingston County8%
6464815%Daviess County78%; Livingston County7%
6467988%Mercer County12%
6464212%Harrison County65%; Daviess County24%
6464179%Sullivan County21%
6463510%Livingston County74%; Linn County15%
6465297%Sullivan County2%

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

Which first three digits do Grundy County'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 Grundy County starts with 646.

Three-digit prefixes of Grundy 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 Grundy County's
PrefixSectional centerHereAll codes
646Kansas City, MO (SCF 640)755

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