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zipcodes.pro — ZIP/21043

21043

ZIP 21043 is in Ellicott City, Maryland, mostly in Howard County; area codes 410, 443 and 667; Eastern time. Ellicott City has 3 ZIP codes; the others are 21041 and 21042.

Type
Standard
Time zone
America/New_York
County
Howard +1 more
Population
48,525
Coordinates
39.2558, -76.8015
☼ Live from 21043 — Ellicott City, MD

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Local time: —

Where 21043 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 21043
  • 🔢 Type 21043 into a pocket calculator and turn it upside down: EhOIZ — not quite a word, sorry.
  • ➕ As a number, 21,043 = 11 × 1913. Its digits add up to 10, a total 513 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 101001000110011
  • 🏠 Its numerical neighbours: 21042 (Ellicott City, MD, 5 mi away) and 21044 (Columbia, MD, 5 mi away).
  • 🔄 Backwards, 21043 becomes 34012, which is not a ZIP code at all.
  • 👥 68 other ZIP codes are made of exactly the same digits (01243, 01342, 01432, 02134, 02143, 02341, …). The farthest-flung twin is 34021 in APO AA, a military post office, 1,961 miles away.
  • 🧭 Farther north than 51% of all ZIP codes, and farther east than 82%.
  • 🎯1,158 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 21043 and you would come out at 39.26°S, 103.20°E — 871 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 56m of daylight. Shortest: 9h 24m.
  • 📏 At 17.1 square miles of land, 21043 is bigger than 35% of ZIP codes — room for about 13 Central Parks.
🌙 The sky over 21043 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population48,525This ZIP48,525
Households17,568This ZIP17,568
Housing units18,133This ZIP18,133
Median age40.3This ZIP40.3Maryland39.4US 38.9
Median household income$148,125This ZIP$148,125Maryland$103,678US $80,734
Median home value$620,900This ZIP$620,900Maryland$419,900US $332,700
Median gross rent$2,094This ZIP$2,094Maryland$1,705US $1,413
Bachelor's degree or higher64.2%This ZIP64.2%
Mean commute28.1 minThis ZIP28.1 min
Population density2,838.2 / sq miThis ZIP2,838.2 / sq mi

Business and tax activity

Business establishments1,131This ZIP1,131
Employees10,059This ZIP10,059
Annual payroll$659,281,000This ZIP$659,281,000
Tax returns filed23,150This ZIP23,150
Total adjusted gross income$2,932,547,000This ZIP$2,932,547,000

Land area

Land area17.10 sq miThis ZIP17.10 sq mi
Water area0.07 sq miThis ZIP0.07 sq mi

Counties 21043 spans

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

CountyShare of this ZIP
Howard County 96.8%
Baltimore County 3.2%

Other place names in 21043

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

ZIP codes near 21043

ZIPCityDistance
21228 Catonsville, MD 3.1 mi
21045 Columbia, MD 3.7 mi
21075 Elkridge, MD 4.5 mi
21250 Baltimore, MD 4.8 mi
21042 Ellicott City, MD 5.2 mi
21044 Columbia, MD 5.4 mi
21244 Windsor Mill, MD 5.6 mi
21046 Columbia, MD 5.9 mi
21163 Woodstock, MD 6.2 mi
21229 Baltimore, MD 6.2 mi

Find every ZIP code within 10 miles of 21043 →

Questions about this ZIP code

Where is ZIP code 21043?

21043 is in Ellicott City, Maryland, in Howard County, part of the Baltimore-Columbia-Towson, MD metropolitan area. Its published point location is 39.2558, -76.8015.

What county is 21043 in?

21043 spans 2 counties: Howard County and Baltimore County. Most of it falls in Howard 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 21043?

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

What time zone is 21043 in?

21043 uses America/New_York.

How many people live in 21043?

About 48,525 people live in ZIP code 21043, in 17,568 households, at 2,838.2 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 21043?

$148,125 a year, against $103,678 across Maryland.

What ZIP codes are near 21043?

The closest are 21228 (3.1 mi), 21045 (3.7 mi), 21075 (4.5 mi), 21250 (4.8 mi) and 21042 (5.2 mi).

Is 21043 a PO Box ZIP code?

21043 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “21043 ZIP Code — Ellicott City, Maryland (Howard County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21043

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