Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — STATE/KS/COUNTY/HAMILTON

Hamilton County, KS ZIP codes

Hamilton County, KS has 3 ZIP codes, in 3 towns: 67878, 67836 and 67857.

The county seat is Syracuse.

ZIP codes
3
Towns
3
County seat
Syracuse
County FIPS
20075
State
Kansas
Population
2,471
Median household income
$70,250
Land area
997 sq mi

Hamilton County ZIP codes by town

Syracuse (county seat)
67878

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

Map of Hamilton County ZIP codes

678366785767878

The ZIP codes of Hamilton County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Hamilton County in numbers

About 2,471 people live in Hamilton County, in 757 households, the 93rd most populous of Kansas's 105 counties. The median household income is $70,250 a year, 5% below the Kansas median of $74,275 (US: $80,734). The median owner-occupied home is valued at $115,800 (47% below the Kansas median), and median gross rent is $909 a month. The median age is 32.1; 20.5% of adults 25 and over hold a bachelor's degree or higher (35.6% across Kansas); the average commute takes 15 minutes.

Population2,471Hamilton2,471
Households757Hamilton757
Median age32.1Hamilton32.1Kansas37.4US 38.9
Median household income$70,250Hamilton$70,250Kansas$74,275US $80,734
Median home value$115,800Hamilton$115,800Kansas$217,200US $332,700
Median gross rent$909Hamilton$909Kansas$1,060US $1,413
Bachelor's degree or higher20.5%Hamilton20.5%Kansas35.6%US 35.7%
Mean commute15.2 minHamilton15.2 minKansas19.7 minUS 26.4 min
Population density2 / sq miHamilton2 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Hamilton County

Largest towns in Hamilton County
TownZIP codesPopulation
Syracuse 1 1,699
Kendall 1 172
Coolidge 1 28

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Hamilton County.

Not sure you are in Hamilton County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Hamilton County, with figures

ZIP codes in Hamilton County
ZIP City Type Population Median income Median home
67836 Coolidge , KS Standard 44 $81,250 —
67857 Kendall , KS Standard 172 — $81,700
67878 Syracuse , KS Standard 2,316 $71,850 $118,800

Cite this page

zipcodes.pro. “Hamilton County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/ks/county/hamilton

Underlying data is public domain or openly licensed — sources, vintages and licences.