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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/40504

40504

ZIP 40504 is in Lexington, Kentucky, in Fayette County; area code 859; Eastern time. Lexington has 39 ZIP codes in all.

Type
Standard
Time zone
America/New_York
County
Fayette
Population
25,816
Coordinates
38.0424, -84.5440
☼ Live from 40504 — Lexington, KY

Weather right now

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NEXRAD radar
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Local time: —

Where 40504 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 40504
  • 🔢 Type 40504 into a pocket calculator and turn it upside down: hOSOh — not quite a word, sorry.
  • ⇆40504 reads the same backwards. It is one of only 412 palindromic ZIP codes.
  • ➕ As a number, 40,504 = 2 × 2 × 2 × 61 × 83. Its digits add up to 13, a total 1,179 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1001111000111000
  • 🏠 Its numerical neighbours: 40503 (Lexington, KY, 3 mi away) and 40505 (Lexington, KY, 5 mi away).
  • 👥 14 other ZIP codes are made of exactly the same digits (00544, 04054, 04450, 05404, 05440, 40045, …). The farthest-flung twin is 04450 in Kenduskeag, ME, 935 miles away.
  • 🧭 Farther south than 58% of all ZIP codes, and farther east than 58%.
  • 🎯764 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 40504 and you would come out at 38.04°S, 95.46°E — 1,226 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 48m of daylight. Shortest: 9h 31m.
  • 📏 At 6.2 square miles of land, 40504 is bigger than 21% of ZIP codes — room for about 4.7 Central Parks.
🌙 The sky over 40504 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population25,816This ZIP25,816
Households12,412This ZIP12,412
Housing units13,312This ZIP13,312
Median age29.6This ZIP29.6Kentucky39.1US 38.9
Median household income$46,055This ZIP$46,055Kentucky$63,726US $80,734
Median home value$222,600This ZIP$222,600Kentucky$205,600US $332,700
Median gross rent$970This ZIP$970Kentucky$967US $1,413
Bachelor's degree or higher33.1%This ZIP33.1%
Mean commute18.5 minThis ZIP18.5 min
Population density4,188.2 / sq miThis ZIP4,188.2 / sq mi

Business and tax activity

Business establishments684This ZIP684
Employees12,262This ZIP12,262
Annual payroll$706,621,000This ZIP$706,621,000
Tax returns filed10,610This ZIP10,610
Total adjusted gross income$550,478,000This ZIP$550,478,000

Land area

Land area6.16 sq miThis ZIP6.16 sq mi
Water area0.03 sq miThis ZIP0.03 sq mi

Other place names in 40504

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

ZIP codes near 40504

ZIPCityDistance
40536 Lexington, KY 2.2 mi
40508 Lexington, KY 2.2 mi
40506 Lexington, KY 2.2 mi
40526 Lexington, KY 2.5 mi
40598 Lexington, KY 2.5 mi
40503 Lexington, KY 2.6 mi
40507 Lexington, KY 2.6 mi
40510 Lexington, KY 2.9 mi
40513 Lexington, KY 3.8 mi
40502 Lexington, KY 4.0 mi

Find every ZIP code within 10 miles of 40504 →

Questions about this ZIP code

Where is ZIP code 40504?

40504 is in Lexington, Kentucky, in Fayette County, part of the Lexington-Fayette, KY metropolitan area. Its published point location is 38.0424, -84.5440.

What county is 40504 in?

40504 lies in Fayette County.

What area code is 40504?

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

What time zone is 40504 in?

40504 uses America/New_York.

How many people live in 40504?

About 25,816 people live in ZIP code 40504, in 12,412 households, at 4,188.2 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 40504?

$46,055 a year, against $63,726 across Kentucky.

What ZIP codes are near 40504?

The closest are 40536 (2.2 mi), 40508 (2.2 mi), 40506 (2.2 mi), 40526 (2.5 mi) and 40598 (2.5 mi).

Is 40504 a PO Box ZIP code?

40504 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “40504 ZIP Code — Lexington, Kentucky (Fayette County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/40504

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