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zipcodes.pro — ZIP/21084

21084

ZIP 21084 is Jarrettsville, Maryland, in Harford County; area codes 443, 410 and 667; Eastern time.

Type
Standard
Time zone
America/New_York
County
Harford
Population
7,070
Coordinates
39.6136, -76.4664
☼ Live from 21084 — Jarrettsville, MD

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Where 21084 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 21084
  • 🔢 Type 21084 into a pocket calculator and turn it upside down: hBOIZ — not quite a word, sorry.
  • ➕ As a number, 21,084 = 2 × 2 × 3 × 7 × 251. Its digits add up to 15, a total 1,657 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 101001001011100
  • 🏠 Its numerical neighbours: 21082 (Hydes, MD, 9 mi away) and 21085 (Joppa, MD, 13 mi away).
  • 🔄 Backwards, 21084 becomes 48012 — and that is a real ZIP code: Birmingham, MI, 405 miles away.
  • 👥 58 other ZIP codes are made of exactly the same digits (01824, 01842, 02148, 02184, 02481, 02814, …). The farthest-flung twin is 84120 in West Valley City, UT, 1,865 miles away.
  • 🧭 Farther north than 53% of all ZIP codes, and farther east than 83%.
  • 🎯1,172 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 21084 and you would come out at 39.61°S, 103.53°E — 869 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 58m of daylight. Shortest: 9h 22m.
  • 📏 At 23.8 square miles of land, 21084 is bigger than 41% of ZIP codes — room for about 18 Central Parks.
🌙 The sky over 21084 today
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🌋 Shake report
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Source: USGS.

People and housing

Population7,070This ZIP7,070
Households2,724This ZIP2,724
Housing units2,765This ZIP2,765
Median age44.0This ZIP44.0Maryland39.4US 38.9
Median household income$121,509This ZIP$121,509Maryland$103,678US $80,734
Median home value$448,400This ZIP$448,400Maryland$419,900US $332,700
Bachelor's degree or higher42.9%This ZIP42.9%
Mean commute39.2 minThis ZIP39.2 min
Population density297.6 / sq miThis ZIP297.6 / sq mi

Business and tax activity

Business establishments191This ZIP191
Employees1,044This ZIP1,044
Annual payroll$52,539,000This ZIP$52,539,000
Tax returns filed3,830This ZIP3,830
Total adjusted gross income$402,455,000This ZIP$402,455,000

Land area

Land area23.76 sq miThis ZIP23.76 sq mi
Water area0.08 sq miThis ZIP0.08 sq mi

Other place names in 21084

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

ZIP codes near 21084

ZIPCityDistance
21050 Forest Hill, MD 4.4 mi
21132 Pylesville, MD 6.1 mi
21161 White Hall, MD 6.1 mi
21047 Fallston, MD 6.2 mi
21154 Street, MD 6.4 mi
21111 Monkton, MD 7.1 mi
21013 Baldwin, MD 7.2 mi
21014 Bel Air, MD 8.1 mi
21018 Benson, MD 8.4 mi
21082 Hydes, MD 9.4 mi

Find every ZIP code within 10 miles of 21084 →

Questions about this ZIP code

Where is ZIP code 21084?

21084 is in Jarrettsville, Maryland, in Harford County, part of the Baltimore-Columbia-Towson, MD metropolitan area. Its published point location is 39.6136, -76.4664.

What county is 21084 in?

21084 lies in Harford County.

What area code is 21084?

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

What time zone is 21084 in?

21084 uses America/New_York.

How many people live in 21084?

About 7,070 people live in ZIP code 21084, in 2,724 households, at 297.6 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 21084?

$121,509 a year, against $103,678 across Maryland.

What ZIP codes are near 21084?

The closest are 21050 (4.4 mi), 21132 (6.1 mi), 21161 (6.1 mi), 21047 (6.2 mi) and 21154 (6.4 mi).

Is 21084 a PO Box ZIP code?

21084 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “21084 ZIP Code — Jarrettsville, Maryland (Harford County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21084

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