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County ZIP codes · Kansas · FIPS 20103

Leavenworth County, KS ZIP Codes

Leavenworth County, Kansas has 13 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 8 of the residential ones lie mainly in Leavenworth County and 5 mainly in a neighboring county; 7 cross the county line. Median household income ranges from $55,955 in 66044 (Lawrence) to $121,266 in 66007 (Basehor) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Leavenworth County?

66002 · Atchison: $61k66007 · Basehor: $121k66012 · Bonner Springs: $98k66020 · Easton: $79k66027 · Fort Leavenworth: $102k66043 · Lansing: $103k66044 · Lawrence: $56k66048 · Leavenworth: $73k66052 · Linwood: $82k66054 · McLouth: $98k66086 · Tonganoxie: $98k66097 · Winchester: $66k66109 · Kansas City: $103k66002660486608666054660446602066012660526609766109660076602766002 · Atchison: $61k66007 · Basehor: $121k66012 · Bonner Springs: $98k66020 · Easton: $79k66027 · Fort Leavenworth: $102k66043 · Lansing: $103k66044 · Lawrence: $56k66048 · Leavenworth: $73k66052 · Linwood: $82k66054 · McLouth: $98k66086 · Tonganoxie: $98k66097 · Winchester: $66k66109 · Kansas City: $103k660026604866086660546604466020660126605266097661096600766002 · Atchison: $61k66007 · Basehor: $121k66012 · Bonner Springs: $98k66020 · Easton: $79k66027 · Fort Leavenworth: $102k66043 · Lansing: $103k66044 · Lawrence: $56k66048 · Leavenworth: $73k66052 · Linwood: $82k66054 · McLouth: $98k66086 · Tonganoxie: $98k66097 · Winchester: $66k66109 · Kansas City: $103k66002660486608666054660446602066012660526609766109
The residential ZIP codes of Leavenworth 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 $72,734 and $102,208.

They carry 13 postal town names.

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

All 13 residential ZIP codes in Leavenworth County

8 ZIP codes lie mainly in Leavenworth County; 5 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Leavenworth County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
66048 Leavenworth 35,717 264 $73k $219k 100%
66043 Lansing 11,056 1,532 $103k $271k 100%
66086 Tonganoxie 10,940 115 $98k $326k 99%
66012 Bonner Springs 10,425 263 $98k $277k 56%
66007 Basehor 10,150 323 $121k $381k 100%
66027 Fort Leavenworth 7,365 793 $102k – 100%
66052 Linwood 2,090 51 $82k $340k 100%
66020 Easton 1,809 29 $79k $320k 100%

Partly in Leavenworth County

Residential ZIP codes mainly in another county that reach at least 1% into Leavenworth County, by their share here
In this county
66054 McLouth 2,777 36 $98k $244k 36%
66044 Lawrence 28,820 449 $56k $235k 29%
66109 Kansas City 28,355 618 $103k $274k 6%
66002 Atchison 13,276 70 $61k $149k 4%
66097 Winchester 995 20 $66k $254k 4%

Download the 13 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 Leavenworth County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Leavenworth County and in the neighboring counties
ZIPIn LeavenworthElsewhere
6604429%Douglas County 38%; Jefferson County 33%
661096%Wyandotte County 94%
660024%Atchison County 74%; Doniphan County 18%; Jefferson County 5%
6608699%Jefferson County 1%
6601256%Wyandotte County 44%
6605436%Jefferson County 64%
660974%Jefferson County 96%

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

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Leavenworth County's ZIP codes use 2 prefixes: 660 and 661.

Three-digit prefixes of Leavenworth 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 Leavenworth County's
PrefixSectional centerHereAll codes
660 Kansas City, MO (SCF 640) 12 71
661 Kansas City, MO (SCF 640) 1 16

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