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 — METRO/23190-FRANKLIN

Franklin, KY

ZIP codes
2
CBSA code
23190
Type
Micropolitan statistical area
States
KY
Population
19,972
Combined area
Bowling Green-Glasgow-Franklin, KY

Metro areas are defined by the Office of Management and Budget as whole counties, so every ZIP code in a member county is listed here.

Franklin in numbers

About 19,972 people live in the Franklin micropolitan area. The median household income is $59,858 a year (US: $80,734). The median owner-occupied home is valued at $229,400, and median gross rent is $1,012 a month.

Population19,972Franklin19,972
Median household income$59,858Franklin$59,858US $80,734
Median home value$229,400Franklin$229,400US $332,700
Median gross rent$1,012Franklin$1,012US $1,413

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.

Its county

Counties in Franklin, KY
CountyZIP codesPopulationMedian income
Simpson County, KY 2 19,972 $59,858

ZIP codes in Franklin

ZIP codes in Franklin, KY
ZIP City Type Population Median income Median home
42134 Franklin , KY Standard 19,380 $59,113 $226,800
42135 Franklin , KY No street area — — —

Cite this page

zipcodes.pro. “Franklin, KY.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/metro/23190-franklin

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