Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — ZIP/21801

21801

ZIP 21801 is in Salisbury, Maryland, in Wicomico County; area codes 410, 667 and 443; Eastern time. Salisbury has 4 ZIP codes; the others are 21802, 21803 and 21804.

Type
Standard
Time zone
America/New_York
County
Wicomico
Metro area
Salisbury, MD
Population
30,088
Coordinates
38.3494, -75.6785
☼ Live from 21801 — Salisbury, MD

Weather right now

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Local time: —

Where 21801 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 21801
  • 🔢 Type 21801 into a pocket calculator and turn it upside down: IOBIZ — not quite a word, sorry.
  • ➕ As a number, 21,801 = 3 × 13 × 13 × 43. Its digits add up to 12, a total 940 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 101010100101001
  • 🏠 Its numerical neighbours: 21798 (Woodsboro, MD, 120 mi away) and 21802 (Salisbury, MD, 4 mi away).
  • 🔄 Backwards, 21801 becomes 10812, which is not a ZIP code at all.
  • 👥 34 other ZIP codes are made of exactly the same digits (01128, 01812, 01821, 02118, 10128, 10281, …). The farthest-flung twin is 81120 in Antonito, CO, 1,669 miles away.
  • 🧭 Farther south than 56% of all ZIP codes, and farther east than 86%.
  • 🎯1,229 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 21801 and you would come out at 38.35°S, 104.32°E — 787 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 50m of daylight. Shortest: 9h 29m.
  • 📏 At 40.1 square miles of land, 21801 is bigger than 53% of ZIP codes — room for about 30 Central Parks.
🌙 The sky over 21801 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population30,088This ZIP30,088
Households11,348This ZIP11,348
Housing units12,296This ZIP12,296
Median age36.9This ZIP36.9Maryland39.4US 38.9
Median household income$71,313This ZIP$71,313Maryland$103,678US $80,734
Median home value$327,700This ZIP$327,700Maryland$419,900US $332,700
Median gross rent$1,114This ZIP$1,114Maryland$1,705US $1,413
Bachelor's degree or higher33.5%This ZIP33.5%
Mean commute22.6 minThis ZIP22.6 min
Population density749.8 / sq miThis ZIP749.8 / sq mi

Business and tax activity

Business establishments1,141This ZIP1,141
Employees20,295This ZIP20,295
Annual payroll$1,072,668,000This ZIP$1,072,668,000
Tax returns filed13,370This ZIP13,370
Total adjusted gross income$944,182,000This ZIP$944,182,000

Land area

Land area40.13 sq miThis ZIP40.13 sq mi
Water area1.55 sq miThis ZIP1.55 sq mi

Other place names in 21801

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

ZIP codes near 21801

ZIPCityDistance
21826 Fruitland, MD 3.5 mi
21802 Salisbury, MD 3.9 mi
21803 Salisbury, MD 3.9 mi
21810 Allen, MD 4.1 mi
21822 Eden, MD 4.3 mi
21830 Hebron, MD 4.5 mi
21856 Quantico, MD 6.4 mi
21804 Salisbury, MD 8.3 mi
21837 Mardela Springs, MD 8.7 mi
21865 Tyaskin, MD 9.3 mi

Find every ZIP code within 10 miles of 21801 →

Questions about this ZIP code

Where is ZIP code 21801?

21801 is in Salisbury, Maryland, in Wicomico County, part of the Salisbury, MD metropolitan area. Its published point location is 38.3494, -75.6785.

What county is 21801 in?

21801 lies in Wicomico County.

What area code is 21801?

Salisbury uses area codes 410, 667 and 443, from NANPA's telephone records.

What time zone is 21801 in?

21801 uses America/New_York.

How many people live in 21801?

About 30,088 people live in ZIP code 21801, in 11,348 households, at 749.8 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 21801?

$71,313 a year, against $103,678 across Maryland.

What ZIP codes are near 21801?

The closest are 21826 (3.5 mi), 21802 (3.9 mi), 21803 (3.9 mi), 21810 (4.1 mi) and 21822 (4.3 mi).

Is 21801 a PO Box ZIP code?

21801 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “21801 ZIP Code — Salisbury, Maryland (Wicomico County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21801

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