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 — ZIP/40330

40330

ZIP 40330 is Harrodsburg, Kentucky, mostly in Mercer County; area code 859; Eastern time.

Type
Standard
Time zone
America/New_York
County
Mercer +1 more
Metro area
none
Population
21,250
Coordinates
37.7877, -84.8881
☼ Live from 40330 — Harrodsburg, KY

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 40330 is

Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.

★ Weird and wonderful facts about 40330
  • 🔢 Type 40330 into a pocket calculator and turn it upside down: OEEOh — not quite a word, sorry.
  • ➕ As a number, 40,330 = 2 × 5 × 37 × 109. Its digits add up to 10, a total 513 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1001110110001010
  • 🏠 Its numerical neighbours: 40328 (Gravel Switch, KY, 16 mi away) and 40334 (Hope, KY, 64 mi away).
  • 🔄 Backwards, 40330 becomes 03304 — and that is a real ZIP code: Bow, NH, 792 miles away.
  • 👥 16 other ZIP codes are made of exactly the same digits (03034, 03043, 03304, 04033, 04330, 30034, …). The farthest-flung twin is 34030 in APO AA, a military post office, 4,992 miles away.
  • 🧭 Farther south than 60% of all ZIP codes, and farther east than 57%.
  • 🎯750 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 40330 and you would come out at 37.79°S, 95.11°E — 1,240 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 47m of daylight. Shortest: 9h 33m.
  • 📏 At 220.7 square miles of land, 40330 is bigger than 92% of ZIP codes — room for about 168 Central Parks.
🌙 The sky over 40330 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population21,250This ZIP21,250
Households8,532This ZIP8,532
Housing units9,674This ZIP9,674
Median age42.5This ZIP42.5Kentucky39.1US 38.9
Median household income$63,992This ZIP$63,992Kentucky$63,726US $80,734
Median home value$199,500This ZIP$199,500Kentucky$205,600US $332,700
Median gross rent$824This ZIP$824Kentucky$967US $1,413
Bachelor's degree or higher25.3%This ZIP25.3%
Mean commute25.7 minThis ZIP25.7 min
Population density96.3 / sq miThis ZIP96.3 / sq mi

Business and tax activity

Business establishments328This ZIP328
Employees5,176This ZIP5,176
Annual payroll$273,896,000This ZIP$273,896,000
Tax returns filed8,950This ZIP8,950
Total adjusted gross income$545,004,000This ZIP$545,004,000

Land area

Land area220.73 sq miThis ZIP220.73 sq mi
Water area3.34 sq miThis ZIP3.34 sq mi

Counties 40330 spans

A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.

CountyShare of this ZIP
Mercer County 88.3%
Washington County 11.7%

Other place names in 40330

Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.

ZIP codes near 40330

ZIPCityDistance
40310 Burgin, KY 6.8 mi
40372 Salvisa, KY 8.6 mi
40040 Mackville, KY 9.9 mi
40468 Perryville, KY 10.7 mi
40422 Danville, KY 10.9 mi
40423 Danville, KY 11.7 mi
40390 Wilmore, KY 12.5 mi
40452 Mitchellsburg, KY 13.2 mi
40410 Bryantsville, KY 14.0 mi
40078 Willisburg, KY 14.3 mi

Find every ZIP code within 10 miles of 40330 →

Questions about this ZIP code

Where is ZIP code 40330?

40330 is in Harrodsburg, Kentucky, in Mercer County. Its published point location is 37.7877, -84.8881.

What county is 40330 in?

40330 spans 2 counties: Mercer County and Washington County. Most of it falls in Mercer County, measured by overlapping land area — the county holding the most land in a ZIP code is not always the one holding the most residents.

What area code is 40330?

Harrodsburg uses area code 859, from NANPA's telephone records.

What time zone is 40330 in?

40330 uses America/New_York.

How many people live in 40330?

About 21,250 people live in ZIP code 40330, in 8,532 households, at 96.3 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.

What is the median household income in 40330?

$63,992 a year, against $63,726 across Kentucky.

What ZIP codes are near 40330?

The closest are 40310 (6.8 mi), 40372 (8.6 mi), 40040 (9.9 mi), 40468 (10.7 mi) and 40422 (10.9 mi).

Is 40330 a PO Box ZIP code?

40330 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “40330 ZIP Code — Harrodsburg, Kentucky (Mercer County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/40330

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/40330.json

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