22121

ZIP 22121 is Mount Vernon, Virginia, in Fairfax County; area codes 703 and 571; Eastern time.

Type: No street area
Time zone: America/New_York
County: Fairfax
Metro area: Washington-Arlington-Alexandria, DC-VA-MD-WV
Coordinates: 38.7192, -77.1073

The Census map gives this ZIP code no delivery area of its own, which usually means it serves post office boxes, a single organization or a post office rather than streets of homes.

This ZIP code has no Census tabulation area of its own. Its point falls inside ZCTA 22309, whose figures describe that area — not this ZIP code.

☼ Live from 22121 — Mount Vernon, VA

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Where 22121 is

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This ZIP code has no Census tabulation area, so there is no boundary to draw — the marker is its published point location.

★ Weird and wonderful facts about 22121

🔢 Type 22121 into a pocket calculator and turn it upside down: IZIZZ — not quite a word, sorry.
➕ As a number, 22,121 = 11 × 2011. Its digits add up to 8, a total 251 other ZIP codes share.
💾In binary, the way a computer stores it: 101011001101001
🏠 Its numerical neighbours: 22119 (Merrifield, VA, 12 mi away) and 22122 (Newington, VA, 4 mi away).
🔄 Backwards, 22121 becomes 12122 — and that is a real ZIP code: Middleburgh, NY, 302 miles away.
👥 7 other ZIP codes are made of exactly the same digits (11222, 12122, 12212, 21122, 21212, 21221, …). The farthest-flung twin is 12212 in Albany, NY, 326 miles away.
🧭 Farther south than 53% of all ZIP codes, and farther east than 81%.
🎯1,148 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
🌏 Dig straight through the Earth from 22121 and you would come out at 38.72°S, 102.89°E — 866 miles from Perth, Australia, the nearest big city to that spot.
☀Longest day of the year: 14h 53m of daylight. Shortest: 9h 27m.

🌙 The sky over 22121 today

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Source: USGS.

Business and tax activity

Business establishments	6This ZIP6
Employees	660This ZIP660
Annual payroll	$25,648,000This ZIP$25,648,000

Land area

ZIP codes near 22121

ZIP	City	Distance
`22309`	Alexandria, VA	0.1 mi
`22036`	Fairfax, VA	1.8 mi
`22306`	Alexandria, VA	2.1 mi
`22308`	Alexandria, VA	2.6 mi
`22060`	Fort Belvoir, VA	3.0 mi
`22315`	Alexandria, VA	3.4 mi
`20616`	Bryans Road, MD	4.0 mi
`22307`	Alexandria, VA	4.4 mi
`22122`	Newington, VA	4.4 mi
`22310`	Alexandria, VA	4.6 mi

Find every ZIP code within 10 miles of 22121 →

Questions about this ZIP code

Where is ZIP code 22121?

22121 is in Mount Vernon, Virginia, in Fairfax County, part of the Washington-Arlington-Alexandria, DC-VA-MD-WV metropolitan area. Its published point location is 38.7192, -77.1073.

What county is 22121 in?

22121 lies in Fairfax County.

What area code is 22121?

Mount Vernon uses area codes 703 and 571, from NANPA's telephone records.

What time zone is 22121 in?

22121 uses America/New_York.

What ZIP codes are near 22121?

The closest are 22309 (0.1 mi), 22036 (1.8 mi), 22306 (2.1 mi), 22308 (2.6 mi) and 22060 (3 mi).

Is 22121 a PO Box ZIP code?

Possibly. The Census map gives this ZIP code no delivery area of its own, which usually means it serves post office boxes, a single organization or a post office rather than streets of homes.

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Cite this page

zipcodes.pro. “22121 ZIP Code — Mount Vernon, Virginia (Fairfax County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/22121

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/22121.json

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