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zipcodes.pro — ZIP/21911

21911

ZIP 21911 is Rising Sun, Maryland, in Cecil County; area codes 410 and 667; Eastern time.

Type
Standard
Time zone
America/New_York
County
Cecil
Population
10,551
Coordinates
39.6951, -76.0318
☼ Live from 21911 — Rising Sun, MD

Weather right now

Asking the National Weather Service…

NEXRAD radar
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Local time: —

Where 21911 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 21911
  • 🔢 Type 21911 into a pocket calculator and turn it upside down: IIGIZ — not quite a word, sorry.
  • ➕ 21911 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 14, a total 1,416 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 101010110010111
  • 🏠 Its numerical neighbours: 21904 (Port Deposit, MD, 6 mi away) and 21912 (Warwick, MD, 22 mi away).
  • 🔄 Backwards, 21911 becomes 11912, which is not a ZIP code at all.
  • 👥 7 other ZIP codes are made of exactly the same digits (11219, 12911, 19112, 19121, 29111, 91121, …). The farthest-flung twin is 91121 in Pasadena, CA, 2,336 miles away.
  • 🧭 Farther north than 54% of all ZIP codes, and farther east than 85%.
  • 🎯1,194 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 21911 and you would come out at 39.70°S, 103.97°E — 853 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 59m of daylight. Shortest: 9h 21m.
  • 📏 At 37.4 square miles of land, 21911 is bigger than 51% of ZIP codes — room for about 28 Central Parks.
🌙 The sky over 21911 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population10,551This ZIP10,551
Households3,953This ZIP3,953
Housing units4,159This ZIP4,159
Median age41.9This ZIP41.9Maryland39.4US 38.9
Median household income$104,673This ZIP$104,673Maryland$103,678US $80,734
Median home value$359,000This ZIP$359,000Maryland$419,900US $332,700
Median gross rent$1,218This ZIP$1,218Maryland$1,705US $1,413
Bachelor's degree or higher25.2%This ZIP25.2%
Mean commute28.5 minThis ZIP28.5 min
Population density281.8 / sq miThis ZIP281.8 / sq mi

Business and tax activity

Business establishments188This ZIP188
Employees1,581This ZIP1,581
Annual payroll$63,732,000This ZIP$63,732,000
Tax returns filed5,220This ZIP5,220
Total adjusted gross income$385,974,000This ZIP$385,974,000

Land area

Land area37.44 sq miThis ZIP37.44 sq mi
Water area0.27 sq miThis ZIP0.27 sq mi

Other place names in 21911

Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.

ZIP codes near 21911

ZIPCityDistance
21917 Colora, MD 3.8 mi
19362 Nottingham, PA 4.4 mi
21904 Port Deposit, MD 5.8 mi
19363 Oxford, PA 7.2 mi
21918 Conowingo, MD 7.7 mi
21903 Perryville, MD 8.4 mi
21901 North East, MD 8.5 mi
19351 Lewisville, PA 8.6 mi
21914 Charlestown, MD 8.7 mi
21916 Childs, MD 9.2 mi

Find every ZIP code within 10 miles of 21911 →

Questions about this ZIP code

Where is ZIP code 21911?

21911 is in Rising Sun, Maryland, in Cecil County, part of the Philadelphia-Camden-Wilmington, PA-NJ-DE-MD metropolitan area. Its published point location is 39.6951, -76.0318.

What county is 21911 in?

21911 lies in Cecil County.

What area code is 21911?

Rising Sun uses area codes 410 and 667, from NANPA's telephone records.

What time zone is 21911 in?

21911 uses America/New_York.

How many people live in 21911?

About 10,551 people live in ZIP code 21911, in 3,953 households, at 281.8 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 21911?

$104,673 a year, against $103,678 across Maryland.

What ZIP codes are near 21911?

The closest are 21917 (3.8 mi), 19362 (4.4 mi), 21904 (5.8 mi), 19363 (7.2 mi) and 21918 (7.7 mi).

Is 21911 a PO Box ZIP code?

21911 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “21911 ZIP Code — Rising Sun, Maryland (Cecil County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21911

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