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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/21015

21015

ZIP 21015 is in Bel Air, Maryland, in Harford County; area codes 443, 410 and 667; Eastern time. Bel Air has 2 ZIP codes; the other is 21014.

Type
Standard
Time zone
America/New_York
County
Harford
Population
30,013
Coordinates
39.5442, -76.2925
☼ Live from 21015 — Bel Air, MD

Weather right now

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NEXRAD radar
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Local time: —

Where 21015 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 21015
  • 🔢 Type 21015 into a pocket calculator and turn it upside down: SIOIZ — not quite a word, sorry.
  • ➕ As a number, 21,015 = 3 × 3 × 5 × 467. Its digits add up to 9, a total 375 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 101001000010111
  • 🏠 Its numerical neighbours: 21014 (Bel Air, MD, 3 mi away) and 21017 (Belcamp, MD, 6 mi away).
  • 🔄 Backwards, 21015 becomes 51012 — and that is a real ZIP code: Cherokee, IA, 1,024 miles away.
  • 👥 37 other ZIP codes are made of exactly the same digits (01152, 01521, 02115, 02151, 10125, 10152, …). The farthest-flung twin is 51102 in Sioux City, IA, 1,060 miles away.
  • 🧭 Farther north than 53% of all ZIP codes, and farther east than 84%.
  • 🎯1,182 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 21015 and you would come out at 39.54°S, 103.71°E — 859 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 58m of daylight. Shortest: 9h 22m.
  • 📏 At 31.2 square miles of land, 21015 is bigger than 47% of ZIP codes — room for about 24 Central Parks.
🌙 The sky over 21015 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population30,013This ZIP30,013
Households11,012This ZIP11,012
Housing units11,408This ZIP11,408
Median age40.4This ZIP40.4Maryland39.4US 38.9
Median household income$137,281This ZIP$137,281Maryland$103,678US $80,734
Median home value$443,400This ZIP$443,400Maryland$419,900US $332,700
Median gross rent$1,752This ZIP$1,752Maryland$1,705US $1,413
Bachelor's degree or higher53.4%This ZIP53.4%
Mean commute31.6 minThis ZIP31.6 min
Population density960.4 / sq miThis ZIP960.4 / sq mi

Business and tax activity

Business establishments624This ZIP624
Employees6,216This ZIP6,216
Annual payroll$249,319,000This ZIP$249,319,000
Tax returns filed15,740This ZIP15,740
Total adjusted gross income$1,794,716,000This ZIP$1,794,716,000

Land area

Land area31.25 sq miThis ZIP31.25 sq mi
Water area0.22 sq miThis ZIP0.22 sq mi

Other place names in 21015

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

ZIP codes near 21015

ZIPCityDistance
21028 Churchville, MD 2.7 mi
21014 Bel Air, MD 3.2 mi
21009 Abingdon, MD 5.0 mi
21018 Benson, MD 5.5 mi
21001 Aberdeen, MD 5.6 mi
21017 Belcamp, MD 5.7 mi
21050 Forest Hill, MD 6.0 mi
21130 Perryman, MD 7.3 mi
21085 Joppa, MD 7.6 mi
21034 Darlington, MD 7.6 mi

Find every ZIP code within 10 miles of 21015 →

Questions about this ZIP code

Where is ZIP code 21015?

21015 is in Bel Air, Maryland, in Harford County, part of the Baltimore-Columbia-Towson, MD metropolitan area. Its published point location is 39.5442, -76.2925.

What county is 21015 in?

21015 lies in Harford County.

What area code is 21015?

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

What time zone is 21015 in?

21015 uses America/New_York.

How many people live in 21015?

About 30,013 people live in ZIP code 21015, in 11,012 households, at 960.4 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 21015?

$137,281 a year, against $103,678 across Maryland.

What ZIP codes are near 21015?

The closest are 21028 (2.7 mi), 21014 (3.2 mi), 21009 (5 mi), 21018 (5.5 mi) and 21001 (5.6 mi).

Is 21015 a PO Box ZIP code?

21015 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “21015 ZIP Code — Bel Air, Maryland (Harford County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21015

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