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County ZIP codes · Kansas · FIPS 20013

Brown County, KS ZIP Codes

Brown 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 Brown County and 5 mainly in a neighboring county; 9 cross the county line. Median household income ranges from $53,348 in 66439 (Horton) to $76,613 in 66434 (Hiawatha) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Brown County?

66017 · Denton: $69k66041 · Lancaster: $57k66094 · White Cloud: $72k66424 · Everest: $59k66425 · Fairview: $61k66434 · Hiawatha: $77k66439 · Horton: $53k66515 · Morrill: $89k66516 · Netawaka: $81k66527 · Powhattan: $61k66532 · Robinson: $77k66534 · Sabetha: $73k66550 · Wetmore: $60k6643466534664396653266516660416655066094664246642566017665276651566017 · Denton: $69k66041 · Lancaster: $57k66094 · White Cloud: $72k66424 · Everest: $59k66425 · Fairview: $61k66434 · Hiawatha: $77k66439 · Horton: $53k66515 · Morrill: $89k66516 · Netawaka: $81k66527 · Powhattan: $61k66532 · Robinson: $77k66534 · Sabetha: $73k66550 · Wetmore: $60k6643466534664396653266516660416655066094664246642566017665276651566017 · Denton: $69k66041 · Lancaster: $57k66094 · White Cloud: $72k66424 · Everest: $59k66425 · Fairview: $61k66434 · Hiawatha: $77k66439 · Horton: $53k66515 · Morrill: $89k66516 · Netawaka: $81k66527 · Powhattan: $61k66532 · Robinson: $77k66534 · Sabetha: $73k66550 · Wetmore: $60k66434665346643966532665166604166550660946642466425660176652766515
The residential ZIP codes of Brown 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 13 postal town names.

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

All 13 residential ZIP codes in Brown County

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

Residential ZIP codes mainly in Brown County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
66434 Hiawatha 4,740 22 $77k $143k 100%
66439 Horton 2,578 30 $53k $91k 58%
66532 Robinson 527 6 $77k $119k 79%
66424 Everest 486 9 $59k $131k 68%
66094 White Cloud 437 9 $72k $141k 53%
66425 Fairview 391 9 $61k $108k 100%
66515 Morrill 362 10 $89k $99k 100%
66527 Powhattan 244 6 $61k $69k 100%

Partly in Brown County

Residential ZIP codes mainly in another county that reach at least 1% into Brown County, by their share here
In this county
66516 Netawaka 408 8 $81k $174k 30%
66534 Sabetha 3,381 23 $73k $199k 20%
66550 Wetmore 552 8 $60k $130k 10%
66017 Denton 219 5 $69k $134k 7%
66041 Lancaster 614 11 $57k $129k 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?

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

Share of each ZIP code's land in Brown County and in the neighboring counties
ZIPIn BrownElsewhere
6653420%Nemaha County 80%
6643958%Atchison County 39%; Jackson County 4%
660414%Atchison County 87%; Doniphan County 9%
6655010%Nemaha County 79%; Jackson County 11%
6653279%Doniphan County 21%
6642468%Atchison County 32%
6609453%Doniphan County 47%
6651630%Jackson County 70%
660177%Doniphan County 93%

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

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

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Brown County's ZIP codes use 3 prefixes: 660, 664 and 665.

Three-digit prefixes of Brown 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 Brown County's
PrefixSectional centerHereAll codes
660 Kansas City, MO (SCF 640) 3 71
664 Kansas City, MO (SCF 640) 4 37
665 Kansas City, MO (SCF 640) 6 44

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