21161
ZIP 21161 is White Hall, Maryland, mostly in Harford County; area codes 443, 667 and 410; Eastern time.
- Type
- Standard
- Time zone
- America/New_York
- County
- Harford +1 more
- Metro area
- Baltimore-Columbia-Towson, MD
- Population
- 5,221
- Coordinates
- 39.6599, -76.5651
Weather right now
Asking the National Weather Service…
Where 21161 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 21161 into a pocket calculator and turn it upside down: IgIIZ — not quite a word, sorry.
- ➕ As a number, 21,161 = 7 × 3023. Its digits add up to 11, a total 714 other ZIP codes share.
- 💾In binary, the way a computer stores it:
101001010101001 - 🏠 Its numerical neighbours: 21160 (Whiteford, MD, 14 mi away) and 21162 (White Marsh, MD, 20 mi away).
- 🔄 Backwards, 21161 becomes 16112 — and that is a real ZIP code: Bessemer, PA, 226 miles away.
- 👥 7 other ZIP codes are made of exactly the same digits (11216, 12116, 12161, 16112, 16121, 16211, …). The farthest-flung twin is 61112 in Rockford, IL, 671 miles away.
- 🧭 Farther north than 53% of all ZIP codes, and farther east than 83%.
- 🎯1,167 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 21161 and you would come out at 39.66°S, 103.43°E — 875 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 59m of daylight. Shortest: 9h 22m.
- 📏 At 48.5 square miles of land, 21161 is bigger than 59% of ZIP codes — room for about 37 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 5,221This ZIP5,221 |
|---|---|
| Households | 1,887This ZIP1,887 |
| Housing units | 1,937This ZIP1,937 |
| Median age | 46.7This ZIP46.7Maryland39.4US 38.9 |
| Median household income | $108,094This ZIP$108,094Maryland$103,678US $80,734 |
| Median home value | $472,600This ZIP$472,600Maryland$419,900US $332,700 |
| Median gross rent | $2,676This ZIP$2,676Maryland$1,705US $1,413 |
| Bachelor's degree or higher | 39.3%This ZIP39.3% |
| Mean commute | 39.0 minThis ZIP39.0 min |
| Population density | 107.6 / sq miThis ZIP107.6 / sq mi |
Business and tax activity
| Business establishments | 124This ZIP124 |
|---|---|
| Employees | 630This ZIP630 |
| Annual payroll | $34,659,000This ZIP$34,659,000 |
| Tax returns filed | 2,750This ZIP2,750 |
| Total adjusted gross income | $324,014,000This ZIP$324,014,000 |
Land area
| Land area | 48.52 sq miThis ZIP48.52 sq mi |
|---|---|
| Water area | 0.19 sq miThis ZIP0.19 sq mi |
Counties 21161 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Harford County | 53.2% |
| Baltimore County | 46.8% |
ZIP codes near 21161
| ZIP | City | Distance |
|---|---|---|
21120 | Parkton, MD | 5.9 mi |
21111 | Monkton, MD | 6.0 mi |
21105 | Maryland Line, MD | 6.0 mi |
21084 | Jarrettsville, MD | 6.1 mi |
17363 | Stewartstown, PA | 7.5 mi |
17349 | New Freedom, PA | 7.6 mi |
17352 | New Park, PA | 7.9 mi |
21132 | Pylesville, MD | 8.0 mi |
21053 | Freeland, MD | 8.4 mi |
17321 | Fawn Grove, PA | 8.9 mi |
Find every ZIP code within 10 miles of 21161 →
Questions about this ZIP code
Where is ZIP code 21161?
21161 is in White Hall, Maryland, in Harford County, part of the Baltimore-Columbia-Towson, MD metropolitan area. Its published point location is 39.6599, -76.5651.
What county is 21161 in?
21161 spans 2 counties: Harford County and Baltimore County. Most of it falls in Harford 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 21161?
White Hall uses area codes 443, 667 and 410, from NANPA's telephone records.
What time zone is 21161 in?
21161 uses America/New_York.
How many people live in 21161?
About 5,221 people live in ZIP code 21161, in 1,887 households, at 107.6 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 21161?
$108,094 a year, against $103,678 across Maryland.
What ZIP codes are near 21161?
The closest are 21120 (5.9 mi), 21111 (6 mi), 21105 (6 mi), 21084 (6.1 mi) and 17363 (7.5 mi).
Is 21161 a PO Box ZIP code?
21161 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “21161 ZIP Code — White Hall, Maryland (Harford County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21161
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/21161.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.