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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/21223

21223

ZIP 21223 is in Baltimore, Maryland, in Baltimore City; area codes 410, 443 and 667; Eastern time. Baltimore has 42 ZIP codes in all.

Type
Standard
Time zone
America/New_York
Population
19,572
Coordinates
39.2830, -76.6539
☼ Live from 21223 — Baltimore, MD

Weather right now

Asking the National Weather Service…

NEXRAD radar
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Local time: —

Where 21223 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 21223
  • 🔢 Type 21223 into a pocket calculator and turn it upside down: EZZIZ — not quite a word, sorry.
  • ➕ As a number, 21,223 = 19 × 1117. Its digits add up to 10, a total 513 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 101001011100111
  • 🏠 Its numerical neighbours: 21222 (Dundalk, MD, 9 mi away) and 21224 (Baltimore, MD, 6 mi away).
  • 🔄 Backwards, 21223 becomes 32212 — and that is a real ZIP code: Jacksonville, FL, 687 miles away.
  • 👥 8 other ZIP codes are made of exactly the same digits (12223, 12232, 22213, 22312, 23221, 32122, …). The farthest-flung twin is 32122 in Daytona Beach, FL, 739 miles away.
  • 🧭 Farther north than 51% of all ZIP codes, and farther east than 83%.
  • 🎯1,166 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 21223 and you would come out at 39.28°S, 103.35°E — 865 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 56m of daylight. Shortest: 9h 24m.
  • 📏 At 2.6 square miles of land, 21223 is bigger than 13% of ZIP codes — room for about 2.0 Central Parks.
🌙 The sky over 21223 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population19,572This ZIP19,572
Households8,587This ZIP8,587
Housing units12,929This ZIP12,929
Median age38.6This ZIP38.6Maryland39.4US 38.9
Median household income$45,840This ZIP$45,840Maryland$103,678US $80,734
Median home value$110,600This ZIP$110,600Maryland$419,900US $332,700
Median gross rent$1,208This ZIP$1,208Maryland$1,705US $1,413
Bachelor's degree or higher15.6%This ZIP15.6%
Mean commute30.4 minThis ZIP30.4 min
Population density7,453.2 / sq miThis ZIP7,453.2 / sq mi

Business and tax activity

Business establishments373This ZIP373
Employees4,507This ZIP4,507
Annual payroll$221,162,000This ZIP$221,162,000
Tax returns filed7,780This ZIP7,780
Total adjusted gross income$263,260,000This ZIP$263,260,000

Land area

Land area2.63 sq miThis ZIP2.63 sq mi
Water area0.01 sq miThis ZIP0.01 sq mi

Other place names in 21223

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

ZIP codes near 21223

ZIPCityDistance
21290 Baltimore, MD 1.8 mi
21230 Baltimore, MD 1.8 mi
21203 Baltimore, MD 1.8 mi
21235 Baltimore, MD 1.8 mi
21241 Baltimore, MD 1.8 mi
21263 Baltimore, MD 1.8 mi
21264 Baltimore, MD 1.8 mi
21270 Baltimore, MD 1.8 mi
21273 Baltimore, MD 1.8 mi
21275 Baltimore, MD 1.8 mi

Find every ZIP code within 10 miles of 21223 →

Questions about this ZIP code

Where is ZIP code 21223?

21223 is in Baltimore, Maryland, in Baltimore city, part of the Baltimore-Columbia-Towson, MD metropolitan area. Its published point location is 39.2830, -76.6539.

What county is 21223 in?

21223 lies in Baltimore city.

What area code is 21223?

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

What time zone is 21223 in?

21223 uses America/New_York.

How many people live in 21223?

About 19,572 people live in ZIP code 21223, in 8,587 households, at 7,453.2 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 21223?

$45,840 a year, against $103,678 across Maryland.

What ZIP codes are near 21223?

The closest are 21290 (1.8 mi), 21230 (1.8 mi), 21203 (1.8 mi), 21235 (1.8 mi) and 21241 (1.8 mi).

Is 21223 a PO Box ZIP code?

21223 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “21223 ZIP Code — Baltimore, Maryland (Baltimore City).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21223

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