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Where 21856 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.
- 🔢 Type 21856 into a pocket calculator and turn it upside down: gSBIZ — not quite a word, sorry.
- ➕ As a number, 21,856 = 2 × 2 × 2 × 2 × 2 × 683. Its digits add up to 22, a total 2,607 other ZIP codes share.
- 💾In binary, the way a computer stores it:
101010101100000 - 🏠 Its numerical neighbours: 21853 (Princess Anne, MD, 10 mi away) and 21857 (Rehobeth, MD, 21 mi away).
- 🔄 Backwards, 21856 becomes 65812, which is not a ZIP code at all.
- 👥 54 other ZIP codes are made of exactly the same digits (12568, 12586, 12856, 12865, 15268, 15286, …). The farthest-flung twin is 85261 in Scottsdale, AZ, 2,034 miles away.
- 🧭 Farther south than 56% of all ZIP codes, and farther east than 85%.
- 🎯1,223 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 21856 and you would come out at 38.33°S, 104.21°E — 791 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 50m of daylight. Shortest: 9h 29m.
- 📏 At 33.5 square miles of land, 21856 is bigger than 48% of ZIP codes — room for about 25 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 1,037This ZIP1,037 |
|---|---|
| Households | 377This ZIP377 |
| Housing units | 423This ZIP423 |
| Median age | 42.6This ZIP42.6Maryland39.4US 38.9 |
| Median household income | $88,045This ZIP$88,045Maryland$103,678US $80,734 |
| Median home value | $380,600This ZIP$380,600Maryland$419,900US $332,700 |
| Bachelor's degree or higher | 14.3%This ZIP14.3% |
| Mean commute | 25.7 minThis ZIP25.7 min |
| Population density | 31.0 / sq miThis ZIP31.0 / sq mi |
Business and tax activity
| Business establishments | 13This ZIP13 |
|---|---|
| Employees | 72This ZIP72 |
| Annual payroll | $2,439,000This ZIP$2,439,000 |
| Tax returns filed | 410This ZIP410 |
| Total adjusted gross income | $33,577,000This ZIP$33,577,000 |
Land area
| Land area | 33.48 sq miThis ZIP33.48 sq mi |
|---|---|
| Water area | 3.56 sq miThis ZIP3.56 sq mi |
Other place names in 21856
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 21856
| ZIP | City | Distance |
|---|---|---|
21865 | Tyaskin, MD | 3.7 mi |
21830 | Hebron, MD | 5.6 mi |
21814 | Bivalve, MD | 6.2 mi |
21810 | Allen, MD | 6.4 mi |
21801 | Salisbury, MD | 6.4 mi |
21869 | Vienna, MD | 7.6 mi |
21822 | Eden, MD | 7.8 mi |
21840 | Nanticoke, MD | 8.0 mi |
21837 | Mardela Springs, MD | 8.7 mi |
21826 | Fruitland, MD | 9.2 mi |
Find every ZIP code within 10 miles of 21856 →
Questions about this ZIP code
Where is ZIP code 21856?
21856 is in Quantico, Maryland, in Wicomico County, part of the Salisbury, MD metropolitan area. Its published point location is 38.3307, -75.7949.
What county is 21856 in?
21856 lies in Wicomico County.
What area code is 21856?
Quantico uses area codes 410, 667 and 443, from NANPA's telephone records.
What time zone is 21856 in?
21856 uses America/New_York.
How many people live in 21856?
About 1,037 people live in ZIP code 21856, in 377 households, at 31.0 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 21856?
$88,045 a year, against $103,678 across Maryland.
What ZIP codes are near 21856?
The closest are 21865 (3.7 mi), 21830 (5.6 mi), 21814 (6.2 mi), 21810 (6.4 mi) and 21801 (6.4 mi).
Is 21856 a PO Box ZIP code?
21856 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “21856 ZIP Code — Quantico, Maryland (Wicomico County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21856
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/21856.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.