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County ZIP codes · Kansas · FIPS 20117

Marshall County, KS ZIP Codes

Marshall County, Kansas has 12 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 11 of the residential ones lie mainly in Marshall County and 1 mainly in a neighboring county; 8 cross the county line. Median household income ranges from $55,636 in 66508 (Marysville) to $79,481 in 66427 (Frankfort) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Marshall County?

66403 · Axtell: $72k66404 · Baileyville: $90k66406 · Beattie: $68k66411 · Blue Rapids: $57k66412 · Bremen: $87k66427 · Frankfort: $80k66438 · Home: $76k66508 · Marysville: $56k66518 · Oketo: –66541 · Summerfield: $37k66544 · Vermillion: $97k66548 · Waterville: $71k66427665086641166548664036654466404665416640666412664386651866403 · Axtell: $72k66404 · Baileyville: $90k66406 · Beattie: $68k66411 · Blue Rapids: $57k66412 · Bremen: $87k66427 · Frankfort: $80k66438 · Home: $76k66508 · Marysville: $56k66518 · Oketo: –66541 · Summerfield: $37k66544 · Vermillion: $97k66548 · Waterville: $71k66427665086641166548664036654466404665416640666412664386651866403 · Axtell: $72k66404 · Baileyville: $90k66406 · Beattie: $68k66411 · Blue Rapids: $57k66412 · Bremen: $87k66427 · Frankfort: $80k66438 · Home: $76k66508 · Marysville: $56k66518 · Oketo: –66541 · Summerfield: $37k66544 · Vermillion: $97k66548 · Waterville: $71k6642766508664116654866403665446654166406664126643866518
The residential ZIP codes of Marshall 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 12 postal town names.

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

All 12 residential ZIP codes in Marshall County

11 ZIP codes lie mainly in Marshall County; 1 more reaches into it from a neighboring county and follows the first table.

Residential ZIP codes mainly in Marshall County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
66508 Marysville 3,987 22 $56k $135k 100%
66427 Frankfort 1,334 6 $80k $134k 90%
66411 Blue Rapids 1,127 10 $57k $86k 84%
66548 Waterville 975 12 $71k $90k 95%
66403 Axtell 801 9 $72k $252k 75%
66412 Bremen 644 13 $87k $179k 84%
66406 Beattie 365 6 $68k – 100%
66544 Vermillion 287 3 $97k $76k 84%
66541 Summerfield 234 5 $37k $81k 72%
66518 Oketo 211 5 – $153k 100%
66438 Home 200 6 $76k $358k 100%

Partly in Marshall County

Residential ZIP codes mainly in another county that reach at least 1% into Marshall County, by their share here
In this county
66404 Baileyville 481 8 $90k $180k 2%

Download the 12 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?

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

Share of each ZIP code's land in Marshall County and in the neighboring counties
ZIPIn MarshallElsewhere
6642790%Pottawatomie County 10%
6641184%Riley County 16%
6654895%Washington County 3%; Riley County 2%
6640375%Nemaha County 25%
6641284%Washington County 16%
664042%Nemaha County 98%
6654484%Nemaha County 16%
6654172%Pawnee County 28%

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

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Marshall County's ZIP codes use 2 prefixes: 664 and 665.

Three-digit prefixes of Marshall 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 Marshall County's
PrefixSectional centerHereAll codes
664 Kansas City, MO (SCF 640) 7 37
665 Kansas City, MO (SCF 640) 5 44

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