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zipcodes.pro — ZIP/21227

21227

ZIP 21227 is Halethorpe, Maryland, mostly in Baltimore County; area codes 410, 443 and 667; Eastern time.

Type
Standard
Time zone
America/New_York
County
Baltimore +1 more
Population
34,907
Coordinates
39.2400, -76.6795
☼ Live from 21227 — Halethorpe, MD

Weather right now

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Local time: —

Where 21227 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 21227
  • 🔢 Type 21227 into a pocket calculator and turn it upside down: LZZIZ — not quite a word, sorry.
  • ➕ 21227 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: 101001011101011
  • 🏠 Its numerical neighbours: 21226 (Curtis Bay, MD, 7 mi away) and 21228 (Catonsville, MD, 4 mi away).
  • 🔄 Backwards, 21227 becomes 72212 — and that is a real ZIP code: Little Rock, AR, 920 miles away.
  • 👥 12 other ZIP codes are made of exactly the same digits (12227, 12722, 17222, 21722, 22172, 22217, …). The farthest-flung twin is 71222 in Bernice, LA, 995 miles away.
  • 🧭 Farther north than 50% of all ZIP codes, and farther east than 83%.
  • 🎯1,165 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 21227 and you would come out at 39.24°S, 103.32°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 11.3 square miles of land, 21227 is bigger than 29% of ZIP codes — room for about 8.6 Central Parks.
🌙 The sky over 21227 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population34,907This ZIP34,907
Households13,396This ZIP13,396
Housing units14,095This ZIP14,095
Median age36.2This ZIP36.2Maryland39.4US 38.9
Median household income$85,986This ZIP$85,986Maryland$103,678US $80,734
Median home value$289,400This ZIP$289,400Maryland$419,900US $332,700
Median gross rent$1,420This ZIP$1,420Maryland$1,705US $1,413
Bachelor's degree or higher28.5%This ZIP28.5%
Mean commute27.5 minThis ZIP27.5 min
Population density3,080.1 / sq miThis ZIP3,080.1 / sq mi

Business and tax activity

Business establishments920This ZIP920
Employees20,296This ZIP20,296
Annual payroll$1,331,534,000This ZIP$1,331,534,000
Tax returns filed16,660This ZIP16,660
Total adjusted gross income$968,895,000This ZIP$968,895,000

Land area

Land area11.33 sq miThis ZIP11.33 sq mi
Water area0.21 sq miThis ZIP0.21 sq mi

Counties 21227 spans

A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.

CountyShare of this ZIP
Baltimore County 96.7%
Baltimore city 3.3%

Other place names in 21227

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

ZIP codes near 21227

ZIPCityDistance
21250 Baltimore, MD 2.0 mi
21090 Linthicum Heights, MD 2.2 mi
21229 Baltimore, MD 3.1 mi
21223 Baltimore, MD 3.3 mi
21230 Baltimore, MD 3.4 mi
21225 Brooklyn, MD 3.5 mi
21228 Catonsville, MD 4.3 mi
21203 Baltimore, MD 4.4 mi
21235 Baltimore, MD 4.4 mi
21241 Baltimore, MD 4.4 mi

Find every ZIP code within 10 miles of 21227 →

Questions about this ZIP code

Where is ZIP code 21227?

21227 is in Halethorpe, Maryland, in Baltimore County, part of the Baltimore-Columbia-Towson, MD metropolitan area. Its published point location is 39.2400, -76.6795.

What county is 21227 in?

21227 spans 2 counties: Baltimore County and Baltimore city. Most of it falls in Baltimore County, measured by overlapping land area — the county holding the most land in a ZIP code is not always the one holding the most residents.

What area code is 21227?

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

What time zone is 21227 in?

21227 uses America/New_York.

How many people live in 21227?

About 34,907 people live in ZIP code 21227, in 13,396 households, at 3,080.1 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 21227?

$85,986 a year, against $103,678 across Maryland.

What ZIP codes are near 21227?

The closest are 21250 (2 mi), 21090 (2.2 mi), 21229 (3.1 mi), 21223 (3.3 mi) and 21230 (3.4 mi).

Is 21227 a PO Box ZIP code?

21227 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “21227 ZIP Code — Halethorpe, Maryland (Baltimore County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21227

Machine-readable version of these facts:

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