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Where 21811 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 21811 into a pocket calculator and turn it upside down: IIBIZ — not quite a word, sorry.
- ➕ As a number, 21,811 = 17 × 1283. Its digits add up to 13, a total 1,179 other ZIP codes share.
- 💾In binary, the way a computer stores it:
101010100110011 - 🏠 Its numerical neighbours: 21810 (Allen, MD, 25 mi away) and 21813 (Bishopville, MD, 7 mi away).
- 🔄 Backwards, 21811 becomes 11812, which is not a ZIP code at all.
- 👥 8 other ZIP codes are made of exactly the same digits (11218, 12118, 12181, 12811, 18211, 28111, …). The farthest-flung twin is 81121 in Arboles, CO, 1,754 miles away.
- 🧭 Farther south than 56% of all ZIP codes, and farther east than 87%.
- 🎯1,254 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 21811 and you would come out at 38.32°S, 104.78°E — 764 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 50m of daylight. Shortest: 9h 29m.
- 📏 At 101.5 square miles of land, 21811 is bigger than 78% of ZIP codes — room for about 77 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 24,377This ZIP24,377 |
|---|---|
| Households | 10,749This ZIP10,749 |
| Housing units | 15,491This ZIP15,491 |
| Median age | 54.9This ZIP54.9Maryland39.4US 38.9 |
| Median household income | $90,082This ZIP$90,082Maryland$103,678US $80,734 |
| Median home value | $388,900This ZIP$388,900Maryland$419,900US $332,700 |
| Median gross rent | $1,377This ZIP$1,377Maryland$1,705US $1,413 |
| Bachelor's degree or higher | 39.9%This ZIP39.9% |
| Mean commute | 24.2 minThis ZIP24.2 min |
| Population density | 240.2 / sq miThis ZIP240.2 / sq mi |
Business and tax activity
| Business establishments | 689This ZIP689 |
|---|---|
| Employees | 6,736This ZIP6,736 |
| Annual payroll | $311,814,000This ZIP$311,814,000 |
| Tax returns filed | 13,180This ZIP13,180 |
| Total adjusted gross income | $1,203,458,000This ZIP$1,203,458,000 |
Land area
| Land area | 101.50 sq miThis ZIP101.50 sq mi |
|---|---|
| Water area | 12.47 sq miThis ZIP12.47 sq mi |
Other place names in 21811
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 21811
| ZIP | City | Distance |
|---|---|---|
21862 | Showell, MD | 5.2 mi |
21813 | Bishopville, MD | 7.4 mi |
21841 | Newark, MD | 7.4 mi |
21843 | Ocean City, MD | 7.5 mi |
21872 | Whaleyville, MD | 7.7 mi |
21842 | Ocean City, MD | 8.0 mi |
21852 | Powellville, MD | 8.3 mi |
21874 | Willards, MD | 8.6 mi |
21850 | Pittsville, MD | 9.9 mi |
19975 | Selbyville, DE | 10.6 mi |
Find every ZIP code within 10 miles of 21811 →
Questions about this ZIP code
Where is ZIP code 21811?
21811 is in Berlin, Maryland, in Worcester County, part of the Ocean Pines, MD micropolitan area. Its published point location is 38.3211, -75.2222.
What county is 21811 in?
21811 lies in Worcester County.
What area code is 21811?
Berlin uses area codes 410, 443 and 667, from NANPA's telephone records.
What time zone is 21811 in?
21811 uses America/New_York.
How many people live in 21811?
About 24,377 people live in ZIP code 21811, in 10,749 households, at 240.2 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 21811?
$90,082 a year, against $103,678 across Maryland.
What ZIP codes are near 21811?
The closest are 21862 (5.2 mi), 21813 (7.4 mi), 21841 (7.4 mi), 21843 (7.5 mi) and 21872 (7.7 mi).
Is 21811 a PO Box ZIP code?
21811 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “21811 ZIP Code — Berlin, Maryland (Worcester County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21811
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/21811.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.