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County ZIP codes · Kansas · FIPS 20075

Hamilton County, KS ZIP Codes

Hamilton County, Kansas has 4 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 3 of the residential ones lie mainly in Hamilton County and 1 mainly in a neighboring county; 3 cross the county line.

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Hamilton County?

67836 · Coolidge: $81k67857 · Kendall: –67878 · Syracuse: $72k67880 · Ulysses: $67k6787867880678576783667836 · Coolidge: $81k67857 · Kendall: –67878 · Syracuse: $72k67880 · Ulysses: $67k6787867880678576783667836 · Coolidge: $81k67857 · Kendall: –67878 · Syracuse: $72k67880 · Ulysses: $67k678786788067857
The residential ZIP codes of Hamilton 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).

All 4 residential ZIP codes in Hamilton County

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

Residential ZIP codes mainly in Hamilton County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
67878 Syracuse 2,316 3 $72k $119k 96%
67857 Kendall 172 1 – $82k 53%
67836 Coolidge 44 0 $81k – 100%

Partly in Hamilton County

Residential ZIP codes mainly in another county that reach at least 1% into Hamilton County, by their share here
In this county
67880 Ulysses 7,293 11 $67k $111k 2%

Download the 4 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?

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

Share of each ZIP code's land in Hamilton County and in the neighboring counties
ZIPIn HamiltonElsewhere
678802%Grant County80%; Kearny County18%
6787896%Stanton County4%
6785753%Kearny County47%

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

Which first three digits do Hamilton 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 Hamilton County starts with 678.

Three-digit prefixes of Hamilton 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 Hamilton County's
PrefixSectional centerHereAll codes
678Wichita, KS (SCF 670)439

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