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Where 21716 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 21716 into a pocket calculator and turn it upside down: gILIZ — not quite a word, sorry.
- ➕ As a number, 21,716 = 2 × 2 × 61 × 89. Its digits add up to 17, a total 2,133 other ZIP codes share.
- 💾In binary, the way a computer stores it:
101010011010100 - 🏠 Its numerical neighbours: 21715 (Brownsville, MD, 5 mi away) and 21717 (Buckeystown, MD, 11 mi away).
- 🔄 Backwards, 21716 becomes 61712, which is not a ZIP code at all.
- 👥 25 other ZIP codes are made of exactly the same digits (11726, 11762, 12167, 12176, 16127, 16172, …). The farthest-flung twin is 76121 in Fort Worth, TX, 1,185 miles away.
- 🧭 Farther north than 51% of all ZIP codes, and farther east than 79%.
- 🎯1,114 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 21716 and you would come out at 39.32°S, 102.37°E — 911 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 56m of daylight. Shortest: 9h 24m.
- 📏 At 2.7 square miles of land, 21716 is bigger than 14% of ZIP codes — room for about 2.1 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 7,200This ZIP7,200 |
|---|---|
| Households | 2,924This ZIP2,924 |
| Housing units | 3,077This ZIP3,077 |
| Median age | 38.5This ZIP38.5Maryland39.4US 38.9 |
| Median household income | $109,382This ZIP$109,382Maryland$103,678US $80,734 |
| Median home value | $361,300This ZIP$361,300Maryland$419,900US $332,700 |
| Median gross rent | $1,195This ZIP$1,195Maryland$1,705US $1,413 |
| Bachelor's degree or higher | 33.6%This ZIP33.6% |
| Mean commute | 38.5 minThis ZIP38.5 min |
| Population density | 2,636.4 / sq miThis ZIP2,636.4 / sq mi |
Business and tax activity
| Business establishments | 101This ZIP101 |
|---|---|
| Employees | 828This ZIP828 |
| Annual payroll | $27,616,000This ZIP$27,616,000 |
| Tax returns filed | 3,750This ZIP3,750 |
| Total adjusted gross income | $330,763,000This ZIP$330,763,000 |
Land area
| Land area | 2.73 sq miThis ZIP2.73 sq mi |
|---|---|
| Water area | 0.30 sq miThis ZIP0.30 sq mi |
Other place names in 21716
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 21716
| ZIP | City | Distance |
|---|---|---|
21758 | Knoxville, MD | 2.9 mi |
20180 | Lovettsville, VA | 3.4 mi |
21755 | Jefferson, MD | 4.3 mi |
21715 | Brownsville, MD | 4.6 mi |
21718 | Burkittsville, MD | 5.2 mi |
21777 | Point Of Rocks, MD | 5.9 mi |
21779 | Rohrersville, MD | 7.5 mi |
21790 | Tuscarora, MD | 7.6 mi |
25425 | Harpers Ferry, WV | 7.9 mi |
20197 | Waterford, VA | 8.5 mi |
Find every ZIP code within 10 miles of 21716 →
Questions about this ZIP code
Where is ZIP code 21716?
21716 is in Brunswick, Maryland, in Frederick County, part of the Washington-Arlington-Alexandria, DC-VA-MD-WV metropolitan area. Its published point location is 39.3178, -77.6267.
What county is 21716 in?
21716 lies in Frederick County.
What area code is 21716?
Brunswick uses area codes 240, 301 and 227, from NANPA's telephone records.
What time zone is 21716 in?
21716 uses America/New_York.
How many people live in 21716?
About 7,200 people live in ZIP code 21716, in 2,924 households, at 2,636.4 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 21716?
$109,382 a year, against $103,678 across Maryland.
What ZIP codes are near 21716?
The closest are 21758 (2.9 mi), 20180 (3.4 mi), 21755 (4.3 mi), 21715 (4.6 mi) and 21718 (5.2 mi).
Is 21716 a PO Box ZIP code?
21716 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “21716 ZIP Code — Brunswick, Maryland (Frederick County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21716
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/21716.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.