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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/21201

21201

ZIP 21201 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
18,307
Coordinates
39.2950, -76.6223
☼ Live from 21201 — Baltimore, MD

Weather right now

Asking the National Weather Service…

NEXRAD radar
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Local time: —

Where 21201 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 21201
  • 🔢 Type 21201 into a pocket calculator and turn it upside down: IOZIZ — not quite a word, sorry.
  • ➕ As a number, 21,201 = 3 × 37 × 191. Its digits add up to 6, a total 90 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 101001011010001
  • 🏠 Its numerical neighbours: 21163 (Woodstock, MD, 12 mi away) and 21202 (Baltimore, MD, 1 mi away).
  • 🔄 Backwards, 21201 becomes 10212 — and that is a real ZIP code: New York, NY, 170 miles away.
  • 👥 19 other ZIP codes are made of exactly the same digits (02112, 02121, 02211, 10122, 10212, 11022, …). The farthest-flung twin is 02112 in Boston, MA, 360 miles away.
  • 🧭 Farther north than 51% of all ZIP codes, and farther east than 83%.
  • 🎯1,167 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 21201 and you would come out at 39.29°S, 103.38°E — 864 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 56m of daylight. Shortest: 9h 24m.
  • 📏 At 1.3 square miles of land, 21201 is bigger than 9% of ZIP codes — about 615 football fields.
🌙 The sky over 21201 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population18,307This ZIP18,307
Households11,345This ZIP11,345
Housing units12,185This ZIP12,185
Median age33.6This ZIP33.6Maryland39.4US 38.9
Median household income$45,640This ZIP$45,640Maryland$103,678US $80,734
Median home value$275,300This ZIP$275,300Maryland$419,900US $332,700
Median gross rent$1,346This ZIP$1,346Maryland$1,705US $1,413
Bachelor's degree or higher45.8%This ZIP45.8%
Mean commute23.4 minThis ZIP23.4 min
Population density14,415.0 / sq miThis ZIP14,415.0 / sq mi

Business and tax activity

Business establishments1,166This ZIP1,166
Employees37,672This ZIP37,672
Annual payroll$3,048,912,000This ZIP$3,048,912,000
Tax returns filed7,360This ZIP7,360
Total adjusted gross income$389,921,000This ZIP$389,921,000

Land area

Land area1.27 sq miThis ZIP1.27 sq mi
Water area0.00 sq mi

Other place names in 21201

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

ZIP codes near 21201

ZIPCityDistance
21290 Baltimore, MD 0.1 mi
21203 Baltimore, MD 0.7 mi
21235 Baltimore, MD 0.7 mi
21241 Baltimore, MD 0.7 mi
21263 Baltimore, MD 0.7 mi
21264 Baltimore, MD 0.7 mi
21270 Baltimore, MD 0.7 mi
21273 Baltimore, MD 0.7 mi
21275 Baltimore, MD 0.7 mi
21278 Baltimore, MD 0.7 mi

Find every ZIP code within 10 miles of 21201 →

Questions about this ZIP code

Where is ZIP code 21201?

21201 is in Baltimore, Maryland, in Baltimore city, part of the Baltimore-Columbia-Towson, MD metropolitan area. Its published point location is 39.2950, -76.6223.

What county is 21201 in?

21201 lies in Baltimore city.

What area code is 21201?

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

What time zone is 21201 in?

21201 uses America/New_York.

How many people live in 21201?

About 18,307 people live in ZIP code 21201, in 11,345 households, at 14,415.0 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 21201?

$45,640 a year, against $103,678 across Maryland.

What ZIP codes are near 21201?

The closest are 21290 (0.1 mi), 21203 (0.7 mi), 21235 (0.7 mi), 21241 (0.7 mi) and 21263 (0.7 mi).

Is 21201 a PO Box ZIP code?

21201 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “21201 ZIP Code — Baltimore, Maryland (Baltimore City).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21201

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