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County ZIP codes · Kansas · FIPS 20087

Jefferson County, KS ZIP Codes

Jefferson County, Kansas has 15 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 9 of the residential ones lie mainly in Jefferson County and 6 mainly in a neighboring county; 11 cross the county line. Median household income ranges from $55,955 in 66044 (Lawrence) to $98,318 in 66086 (Tonganoxie) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Jefferson County?

66002 · Atchison: $61k66044 · Lawrence: $56k66054 · McLouth: $98k66060 · Nortonville: $77k66066 · Oskaloosa: $80k66070 · Ozawkie: $86k66073 · Perry: $87k66086 · Tonganoxie: $98k66088 · Valley Falls: $76k66097 · Winchester: $66k66419 · Denison: $100k66429 · Grantville: $69k66436 · Holton: $71k66512 · Meriden: $79k66617 · Topeka: $87k66002664366608866086660546661766066665126607366044660606607066097664196642966002 · Atchison: $61k66044 · Lawrence: $56k66054 · McLouth: $98k66060 · Nortonville: $77k66066 · Oskaloosa: $80k66070 · Ozawkie: $86k66073 · Perry: $87k66086 · Tonganoxie: $98k66088 · Valley Falls: $76k66097 · Winchester: $66k66419 · Denison: $100k66429 · Grantville: $69k66436 · Holton: $71k66512 · Meriden: $79k66617 · Topeka: $87k6600266436660886608666054666176606666512660736604466060660976642966002 · Atchison: $61k66044 · Lawrence: $56k66054 · McLouth: $98k66060 · Nortonville: $77k66066 · Oskaloosa: $80k66070 · Ozawkie: $86k66073 · Perry: $87k66086 · Tonganoxie: $98k66088 · Valley Falls: $76k66097 · Winchester: $66k66419 · Denison: $100k66429 · Grantville: $69k66436 · Holton: $71k66512 · Meriden: $79k66617 · Topeka: $87k660026643666088660866605466617660666651266073660446606066097
The residential ZIP codes of Jefferson 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 $71,016 and $86,641.

They carry 15 postal town names.

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

All 15 residential ZIP codes in Jefferson County

9 ZIP codes lie mainly in Jefferson County; 6 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Jefferson County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
66512 Meriden 3,678 55 $79k $214k 83%
66054 McLouth 2,777 36 $98k $244k 64%
66088 Valley Falls 2,697 22 $76k $196k 97%
66066 Oskaloosa 2,432 31 $80k $226k 100%
66073 Perry 2,263 35 $87k $217k 100%
66070 Ozawkie 1,944 63 $86k $220k 100%
66060 Nortonville 1,325 22 $77k $156k 51%
66097 Winchester 995 20 $66k $254k 96%
66429 Grantville 379 30 $69k $175k 100%

Partly in Jefferson County

Residential ZIP codes mainly in another county that reach at least 1% into Jefferson County, by their share here
In this county
66044 Lawrence 28,820 449 $56k $235k 33%
66419 Denison 600 30 $100k $116k 30%
66617 Topeka 8,903 206 $87k $233k 16%
66002 Atchison 13,276 70 $61k $149k 5%
66436 Holton 5,537 30 $71k $213k 1%
66086 Tonganoxie 10,940 115 $98k $326k 1%

Download the 15 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?

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

Share of each ZIP code's land in Jefferson County and in the neighboring counties
ZIPIn JeffersonElsewhere
6604433%Douglas County 38%; Leavenworth County 29%
660025%Atchison County 74%; Doniphan County 18%; Leavenworth County 4%
660861%Leavenworth County 99%
6661716%Shawnee County 83%; Jackson County 1%
664361%Jackson County 85%; Atchison County 14%
6651283%Jackson County 12%; Shawnee County 5%
6605464%Leavenworth County 36%
6608897%Atchison County 3%
6606051%Atchison County 49%
6609796%Leavenworth County 4%
6641930%Jackson County 70%

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

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Jefferson County's ZIP codes use 4 prefixes: 660, 664, 665 and 666.

Three-digit prefixes of Jefferson 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 Jefferson County's
PrefixSectional centerHereAll codes
660 Kansas City, MO (SCF 640) 10 71
664 Kansas City, MO (SCF 640) 3 37
665 Kansas City, MO (SCF 640) 1 44
666 Kansas City, MO (SCF 640) 1 31

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