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 — CITY/KS/FRANKFORT

Frankfort ZIP code, Kansas

The ZIP code for Frankfort, KS is 66427, and its area code is 785.

USPS city name
1 ZIP code
Population
726
Area code
785
State
Kansas

Frankfort in numbers

About 726 people live in Frankfort, in 318 households. The median household income is $70,000 a year, 6% below the Kansas median of $74,275 (US: $80,734). The median owner-occupied home is valued at $89,100 (59% below the Kansas median), and median gross rent is $771 a month. The median age is 45.5; 23.1% of adults 25 and over hold a bachelor's degree or higher (35.6% across Kansas); the average commute takes 20 minutes.

Population726Frankfort726
Households318Frankfort318
Median age45.5Frankfort45.5Kansas37.4US 38.9
Median household income$70,000Frankfort$70,000Kansas$74,275US $80,734
Median home value$89,100Frankfort$89,100Kansas$217,200US $332,700
Median gross rent$771Frankfort$771Kansas$1,060US $1,413
Bachelor's degree or higher23.1%Frankfort23.1%Kansas35.6%US 35.7%
Mean commute19.5 minFrankfort19.5 minKansas19.7 minUS 26.4 min
Population density721 / sq miFrankfort721 / sq mi

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

ZIP codes addressed as Frankfort

ZIP codes with the USPS city name Frankfort
ZIP City Type Population Median income Median home
66427 Frankfort , KS Standard 1,334 $79,481 $133,600

Map of Frankfort ZIP codes

66427

The ZIP codes of Frankfort, KS, 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.

Towns near Frankfort

The nearest larger towns are Blue Rapids (870 people, 13 mi), Marysville (3,422 people, 15 mi) and Waterville (748 people, 18 mi).

Towns near Frankfort
TownPopulationDistance
Marysville 3,422 15.2 mi

More nearby: every ZIP code in Marshall County · Kansas ZIP codes

Cite this page

zipcodes.pro. “Frankfort, KS ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ks/frankfort

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