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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/21794

21794

ZIP 21794 is West Friendship, Maryland, in Howard County; area codes 443, 667 and 410; Eastern time.

Type
Standard
Time zone
America/New_York
County
Howard
Population
2,192
Coordinates
39.2984, -76.9661
☼ Live from 21794 — West Friendship, MD

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Where 21794 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 21794
  • 🔢 Type 21794 into a pocket calculator and turn it upside down: hGLIZ — not quite a word, sorry.
  • ➕ As a number, 21,794 = 2 × 17 × 641. Its digits add up to 23, a total 2,533 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 101010100100010
  • 🏠 Its numerical neighbours: 21793 (Walkersville, MD, 24 mi away) and 21795 (Williamsport, MD, 50 mi away).
  • 🔄 Backwards, 21794 becomes 49712 — and that is a real ZIP code: Boyne City, MI, 579 miles away.
  • 👥 46 other ZIP codes are made of exactly the same digits (12749, 12974, 14729, 17249, 19472, 21749, …). The farthest-flung twin is 94127 in San Francisco, CA, 2,435 miles away.
  • 🧭 Farther north than 51% of all ZIP codes, and farther east than 82%.
  • 🎯1,149 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 21794 and you would come out at 39.30°S, 103.03°E — 880 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 56m of daylight. Shortest: 9h 24m.
  • 📏 At 8.2 square miles of land, 21794 is bigger than 25% of ZIP codes — room for about 6.2 Central Parks.
🌙 The sky over 21794 today
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🌋 Shake report
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Source: USGS.

People and housing

Population2,192This ZIP2,192
Households660This ZIP660
Housing units690This ZIP690
Median age43.4This ZIP43.4Maryland39.4US 38.9
Median household income$231,466This ZIP$231,466Maryland$103,678US $80,734
Median home value$999,400This ZIP$999,400Maryland$419,900US $332,700
Bachelor's degree or higher66.1%This ZIP66.1%
Mean commute33.1 minThis ZIP33.1 min
Population density268.7 / sq miThis ZIP268.7 / sq mi

Business and tax activity

Business establishments84This ZIP84
Employees413This ZIP413
Annual payroll$28,044,000This ZIP$28,044,000
Tax returns filed1,220This ZIP1,220
Total adjusted gross income$315,068,000This ZIP$315,068,000

Land area

Land area8.16 sq miThis ZIP8.16 sq mi
Water area0.03 sq miThis ZIP0.03 sq mi

ZIP codes near 21794

ZIPCityDistance
21723 Cooksville, MD 2.9 mi
21738 Glenwood, MD 3.5 mi
21042 Ellicott City, MD 4.1 mi
21104 Marriottsville, MD 4.4 mi
21041 Ellicott City, MD 4.5 mi
21150 Simpsonville, MD 4.5 mi
21737 Glenelg, MD 4.8 mi
21036 Dayton, MD 4.9 mi
21029 Clarksville, MD 5.9 mi
21797 Woodbine, MD 5.9 mi

Find every ZIP code within 10 miles of 21794 →

Questions about this ZIP code

Where is ZIP code 21794?

21794 is in West Friendship, Maryland, in Howard County, part of the Baltimore-Columbia-Towson, MD metropolitan area. Its published point location is 39.2984, -76.9661.

What county is 21794 in?

21794 lies in Howard County.

What area code is 21794?

West Friendship uses area codes 443, 667 and 410, from NANPA's telephone records.

What time zone is 21794 in?

21794 uses America/New_York.

How many people live in 21794?

About 2,192 people live in ZIP code 21794, in 660 households, at 268.7 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 21794?

$231,466 a year, against $103,678 across Maryland.

What ZIP codes are near 21794?

The closest are 21723 (2.9 mi), 21738 (3.5 mi), 21042 (4.1 mi), 21104 (4.4 mi) and 21041 (4.5 mi).

Is 21794 a PO Box ZIP code?

21794 is a standard ZIP code. A normal ZIP code with street delivery.

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zipcodes.pro. “21794 ZIP Code — West Friendship, Maryland (Howard County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21794

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