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/KY/COUNTY/FRANKLIN

Franklin County, KY ZIP codes

There are 9 ZIP codes in Franklin County, KY, from 40601 to 40622. The largest are 40601 (Frankfort), 40602 (Frankfort) and 40603 (Frankfort).

The county seat is Frankfort.

ZIP codes
9
Towns
1
County seat
Frankfort
County FIPS
21073
Population
51,842
Median household income
$65,298
Land area
208 sq mi
Area code
502
Metro area
Frankfort

Franklin County ZIP codes by town

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 Franklin County ZIP codes

406014060240603406044061840619406204062140622

The ZIP codes of Franklin 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.

Franklin County in numbers

About 51,842 people live in Franklin County, in 22,718 households, the 19th most populous of Kentucky's 120 counties. The median household income is $65,298 a year, about the same as the Kentucky median of $63,726 (US: $80,734). The median owner-occupied home is valued at $216,600 (5% above the Kentucky median), and median gross rent is $967 a month. The median age is 40.8; 31.9% of adults 25 and over hold a bachelor's degree or higher (27.6% across Kentucky); the average commute takes 20 minutes.

Population51,842Franklin51,842
Households22,718Franklin22,718
Median age40.8Franklin40.8Kentucky39.1US 38.9
Median household income$65,298Franklin$65,298Kentucky$63,726US $80,734
Median home value$216,600Franklin$216,600Kentucky$205,600US $332,700
Median gross rent$967Franklin$967Kentucky$967US $1,413
Bachelor's degree or higher31.9%Franklin31.9%Kentucky27.6%US 35.7%
Mean commute20.0 minFranklin20.0 minKentucky24.0 minUS 26.4 min
Population density249 / sq miFranklin249 / 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.

Neighbouring counties

Counties that share a ZIP code with Franklin County.

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

Every ZIP code in Franklin County, with figures

ZIP codes in Franklin County
ZIP City Type Population Median income Median home
40601 Frankfort , KY Standard 51,893 $65,732 $216,700
40602 Frankfort , KY No street area — — —
40603 Frankfort , KY No street area — — —
40604 Frankfort , KY No street area — — —
40618 Frankfort , KY No street area — — —
40619 Frankfort , KY No street area — — —
40620 Frankfort , KY No street area — — —
40621 Frankfort , KY No street area — — —
40622 Frankfort , KY No street area — — —

Cite this page

zipcodes.pro. “Franklin County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/ky/county/franklin

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