Weather right now
Asking the National Weather Service…
Where 21154 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 21154 into a pocket calculator and turn it upside down: hSIIZ — not quite a word, sorry.
- ➕ As a number, 21,154 = 2 × 7 × 1511. Its digits add up to 13, a total 1,179 other ZIP codes share.
- 💾In binary, the way a computer stores it:
101001010100010 - 🏠 Its numerical neighbours: 21153 (Stevenson, MD, 25 mi away) and 21155 (Upperco, MD, 24 mi away).
- 🔄 Backwards, 21154 becomes 45112 — and that is a real ZIP code: Chilo, OH, 420 miles away.
- 👥 33 other ZIP codes are made of exactly the same digits (11245, 11425, 11542, 12154, 12451, 12514, …). The farthest-flung twin is 51241 in Larchwood, IA, 1,069 miles away.
- 🧭 Farther north than 53% of all ZIP codes, and farther east than 84%.
- 🎯1,177 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 21154 and you would come out at 39.66°S, 103.64°E — 866 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 59m of daylight. Shortest: 9h 22m.
- 📏 At 39.3 square miles of land, 21154 is bigger than 53% of ZIP codes — room for about 30 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 6,544This ZIP6,544 |
|---|---|
| Households | 2,403This ZIP2,403 |
| Housing units | 2,692This ZIP2,692 |
| Median age | 50.0This ZIP50.0Maryland39.4US 38.9 |
| Median household income | $97,658This ZIP$97,658Maryland$103,678US $80,734 |
| Median home value | $455,400This ZIP$455,400Maryland$419,900US $332,700 |
| Median gross rent | $1,161This ZIP$1,161Maryland$1,705US $1,413 |
| Bachelor's degree or higher | 27.9%This ZIP27.9% |
| Mean commute | 36.0 minThis ZIP36.0 min |
| Population density | 166.3 / sq miThis ZIP166.3 / sq mi |
Business and tax activity
| Business establishments | 138This ZIP138 |
|---|---|
| Employees | 904This ZIP904 |
| Annual payroll | $42,224,000This ZIP$42,224,000 |
| Tax returns filed | 3,100This ZIP3,100 |
| Total adjusted gross income | $320,446,000This ZIP$320,446,000 |
Land area
| Land area | 39.34 sq miThis ZIP39.34 sq mi |
|---|---|
| Water area | 0.16 sq miThis ZIP0.16 sq mi |
Other place names in 21154
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 21154
| ZIP | City | Distance |
|---|---|---|
21160 | Whiteford, MD | 4.1 mi |
21132 | Pylesville, MD | 4.2 mi |
21050 | Forest Hill, MD | 5.3 mi |
21084 | Jarrettsville, MD | 6.4 mi |
17314 | Delta, PA | 6.6 mi |
21034 | Darlington, MD | 7.4 mi |
17321 | Fawn Grove, PA | 7.8 mi |
21014 | Bel Air, MD | 8.4 mi |
21015 | Bel Air, MD | 8.6 mi |
21028 | Churchville, MD | 8.7 mi |
Find every ZIP code within 10 miles of 21154 →
Questions about this ZIP code
Where is ZIP code 21154?
21154 is in Street, Maryland, in Harford County, part of the Baltimore-Columbia-Towson, MD metropolitan area. Its published point location is 39.6574, -76.3605.
What county is 21154 in?
21154 lies in Harford County.
What area code is 21154?
Street uses area codes 443, 410 and 667, from NANPA's telephone records.
What time zone is 21154 in?
21154 uses America/New_York.
How many people live in 21154?
About 6,544 people live in ZIP code 21154, in 2,403 households, at 166.3 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 21154?
$97,658 a year, against $103,678 across Maryland.
What ZIP codes are near 21154?
The closest are 21160 (4.1 mi), 21132 (4.2 mi), 21050 (5.3 mi), 21084 (6.4 mi) and 17314 (6.6 mi).
Is 21154 a PO Box ZIP code?
21154 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “21154 ZIP Code — Street, Maryland (Harford County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21154
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/21154.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.