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Where 21047 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.
- 🔢 Type 21047 into a pocket calculator and turn it upside down: LhOIZ — not quite a word, sorry.
- ➕ As a number, 21,047 = 13 × 1619. Its digits add up to 14, a total 1,416 other ZIP codes share.
- 💾In binary, the way a computer stores it:
101001000110111 - 🏠 Its numerical neighbours: 21046 (Columbia, MD, 32 mi away) and 21048 (Finksburg, MD, 26 mi away).
- 🔄 Backwards, 21047 becomes 74012 — and that is a real ZIP code: Broken Arrow, OK, 1,082 miles away.
- 👥 66 other ZIP codes are made of exactly the same digits (01247, 01472, 01742, 02471, 02714, 02741, …). The farthest-flung twin is 74102 in Tulsa, OK, 1,090 miles away.
- 🧭 Farther north than 52% of all ZIP codes, and farther east than 84%.
- 🎯1,175 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 21047 and you would come out at 39.53°S, 103.56°E — 864 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 58m of daylight. Shortest: 9h 22m.
- 📏 At 22.5 square miles of land, 21047 is bigger than 40% of ZIP codes — room for about 17 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 13,852This ZIP13,852 |
|---|---|
| Households | 4,810This ZIP4,810 |
| Housing units | 4,899This ZIP4,899 |
| Median age | 45.4This ZIP45.4Maryland39.4US 38.9 |
| Median household income | $157,500This ZIP$157,500Maryland$103,678US $80,734 |
| Median home value | $552,500This ZIP$552,500Maryland$419,900US $332,700 |
| Median gross rent | $2,315This ZIP$2,315Maryland$1,705US $1,413 |
| Bachelor's degree or higher | 55.0%This ZIP55.0% |
| Mean commute | 45.3 minThis ZIP45.3 min |
| Population density | 614.4 / sq miThis ZIP614.4 / sq mi |
Business and tax activity
| Business establishments | 363This ZIP363 |
|---|---|
| Employees | 3,668This ZIP3,668 |
| Annual payroll | $151,677,000This ZIP$151,677,000 |
| Tax returns filed | 6,720This ZIP6,720 |
| Total adjusted gross income | $902,579,000This ZIP$902,579,000 |
Land area
| Land area | 22.55 sq miThis ZIP22.55 sq mi |
|---|---|
| Water area | 0.06 sq miThis ZIP0.06 sq mi |
Other place names in 21047
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 21047
| ZIP | City | Distance |
|---|---|---|
21013 | Baldwin, MD | 3.0 mi |
21018 | Benson, MD | 3.1 mi |
21082 | Hydes, MD | 3.9 mi |
21051 | Fork, MD | 3.9 mi |
21014 | Bel Air, MD | 4.6 mi |
21050 | Forest Hill, MD | 4.7 mi |
21087 | Kingsville, MD | 5.5 mi |
21092 | Long Green, MD | 5.9 mi |
21084 | Jarrettsville, MD | 6.2 mi |
21057 | Glen Arm, MD | 6.7 mi |
Find every ZIP code within 10 miles of 21047 →
Questions about this ZIP code
Where is ZIP code 21047?
21047 is in Fallston, Maryland, in Harford County, part of the Baltimore-Columbia-Towson, MD metropolitan area. Its published point location is 39.5269, -76.4381.
What county is 21047 in?
21047 lies in Harford County.
What area code is 21047?
Fallston uses area codes 443, 410 and 667, from NANPA's telephone records.
What time zone is 21047 in?
21047 uses America/New_York.
How many people live in 21047?
About 13,852 people live in ZIP code 21047, in 4,810 households, at 614.4 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 21047?
$157,500 a year, against $103,678 across Maryland.
What ZIP codes are near 21047?
The closest are 21013 (3 mi), 21018 (3.1 mi), 21082 (3.9 mi), 21051 (3.9 mi) and 21014 (4.6 mi).
Is 21047 a PO Box ZIP code?
21047 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “21047 ZIP Code — Fallston, Maryland (Harford County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21047
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/21047.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.