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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/10504

10504

ZIP 10504 is Armonk, New York, in Westchester County; area code 914; Eastern time.

Type
Standard
Time zone
America/New_York
County
Westchester
Population
7,665
Coordinates
41.1285, -73.7075
☼ Live from 10504 — Armonk, NY

Weather right now

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Local time: —

Where 10504 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 10504
  • 🔢 Type 10504 into a pocket calculator and turn it upside down: hOSOI — not quite a word, sorry.
  • ➕ As a number, 10,504 = 2 × 2 × 2 × 13 × 101. Its digits add up to 10, a total 513 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10100100001000
  • 🏠 Its numerical neighbours: 10503 (Ardsley On Hudson, NY, 11 mi away) and 10505 (Baldwin Place, NY, 15 mi away).
  • 🔄 Backwards, 10504 becomes 40501, which is not a ZIP code at all.
  • 👥 27 other ZIP codes are made of exactly the same digits (01054, 01450, 01504, 01540, 04015, 04051, …). The farthest-flung twin is 51040 in Onawa, IA, 1,154 miles away.
  • 🧭 Farther north than 68% of all ZIP codes, and farther east than 92%.
  • 🎯1,306 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 10504 and you would come out at 41.13°S, 106.29°E — 826 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 08m of daylight. Shortest: 9h 12m.
  • 📏 At 16.1 square miles of land, 10504 is bigger than 34% of ZIP codes — room for about 12 Central Parks.
🌙 The sky over 10504 today
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🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population7,665This ZIP7,665
Households2,458This ZIP2,458
Housing units2,629This ZIP2,629
Median age44.2This ZIP44.2New York39.8US 38.9
Median household income$250,000+This ZIP$250,000+New York$85,974US $80,734
Median home value$1,243,100This ZIP$1,243,100New York$423,800US $332,700
Median gross rent$3,131This ZIP$3,131New York$1,621US $1,413
Bachelor's degree or higher80.2%This ZIP80.2%
Mean commute37.9 minThis ZIP37.9 min
Population density475.1 / sq miThis ZIP475.1 / sq mi

Business and tax activity

Business establishments453This ZIP453
Employees11,979This ZIP11,979
Annual payroll$1,703,710,000This ZIP$1,703,710,000
Tax returns filed3,890This ZIP3,890
Total adjusted gross income$2,124,284,000This ZIP$2,124,284,000

Land area

Land area16.13 sq miThis ZIP16.13 sq mi
Water area1.80 sq miThis ZIP1.80 sq mi

Other place names in 10504

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

ZIP codes near 10504

ZIPCityDistance
10610 White Plains, NY 1.5 mi
10594 Thornwood, NY 3.4 mi
06831 Greenwich, CT 3.7 mi
10570 Pleasantville, NY 4.3 mi
10514 Chappaqua, NY 4.4 mi
10604 West Harrison, NY 4.4 mi
10595 Valhalla, NY 4.7 mi
10549 Mount Kisco, NY 5.1 mi
10532 Hawthorne, NY 5.2 mi
10506 Bedford, NY 5.5 mi

Find every ZIP code within 10 miles of 10504 →

Questions about this ZIP code

Where is ZIP code 10504?

10504 is in Armonk, New York, in Westchester County, part of the New York-Newark-Jersey City, NY-NJ metropolitan area. Its published point location is 41.1285, -73.7075.

What county is 10504 in?

10504 lies in Westchester County.

What area code is 10504?

Armonk uses area code 914, from NANPA's telephone records.

What time zone is 10504 in?

10504 uses America/New_York.

How many people live in 10504?

About 7,665 people live in ZIP code 10504, in 2,458 households, at 475.1 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 10504?

$250,000+ a year, against $85,974 across New York.

What ZIP codes are near 10504?

The closest are 10610 (1.5 mi), 10594 (3.4 mi), 06831 (3.7 mi), 10570 (4.3 mi) and 10514 (4.4 mi).

Is 10504 a PO Box ZIP code?

10504 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “10504 ZIP Code — Armonk, New York (Westchester County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/10504

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