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Where 21163 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 21163 into a pocket calculator and turn it upside down: EgIIZ — not quite a word, sorry.
- ➕ 21163 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 13, a total 1,179 other ZIP codes share.
- 💾In binary, the way a computer stores it:
101001010101011 - 🏠 Its numerical neighbours: 21162 (White Marsh, MD, 24 mi away) and 21201 (Baltimore, MD, 12 mi away).
- 🔄 Backwards, 21163 becomes 36112 — and that is a real ZIP code: Montgomery, AL, 717 miles away.
- 👥 31 other ZIP codes are made of exactly the same digits (11236, 11362, 12136, 13126, 13162, 13261, …). The farthest-flung twin is 62311 in Augusta, IL, 750 miles away.
- 🧭 Farther north than 51% of all ZIP codes, and farther east than 82%.
- 🎯1,155 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 21163 and you would come out at 39.34°S, 103.15°E — 876 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 57m of daylight. Shortest: 9h 23m.
- 📏 At 13.6 square miles of land, 21163 is bigger than 31% of ZIP codes — room for about 10 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 7,539This ZIP7,539 |
|---|---|
| Households | 2,680This ZIP2,680 |
| Housing units | 2,816This ZIP2,816 |
| Median age | 45.4This ZIP45.4Maryland39.4US 38.9 |
| Median household income | $134,672This ZIP$134,672Maryland$103,678US $80,734 |
| Median home value | $602,800This ZIP$602,800Maryland$419,900US $332,700 |
| Median gross rent | $1,438This ZIP$1,438Maryland$1,705US $1,413 |
| Bachelor's degree or higher | 63.3%This ZIP63.3% |
| Mean commute | 29.6 minThis ZIP29.6 min |
| Population density | 552.8 / sq miThis ZIP552.8 / sq mi |
Business and tax activity
| Business establishments | 139This ZIP139 |
|---|---|
| Employees | 843This ZIP843 |
| Annual payroll | $51,159,000This ZIP$51,159,000 |
| Tax returns filed | 3,620This ZIP3,620 |
| Total adjusted gross income | $499,513,000This ZIP$499,513,000 |
Land area
| Land area | 13.64 sq miThis ZIP13.64 sq mi |
|---|---|
| Water area | 0.19 sq miThis ZIP0.19 sq mi |
Counties 21163 spans
A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.
| County | Share of this ZIP |
|---|---|
| Baltimore County | 73.3% |
| Howard County | 26.7% |
Other place names in 21163
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 21163
| ZIP | City | Distance |
|---|---|---|
21133 | Randallstown, MD | 3.4 mi |
21104 | Marriottsville, MD | 3.5 mi |
21244 | Windsor Mill, MD | 3.8 mi |
21042 | Ellicott City, MD | 4.9 mi |
21043 | Ellicott City, MD | 6.2 mi |
21794 | West Friendship, MD | 6.9 mi |
21207 | Gwynn Oak, MD | 6.9 mi |
21228 | Catonsville, MD | 7.0 mi |
21136 | Reisterstown, MD | 7.0 mi |
21282 | Pikesville, MD | 7.2 mi |
Find every ZIP code within 10 miles of 21163 →
Questions about this ZIP code
Where is ZIP code 21163?
21163 is in Woodstock, Maryland, in Baltimore County, part of the Baltimore-Columbia-Towson, MD metropolitan area. Its published point location is 39.3375, -76.8482.
What county is 21163 in?
21163 spans 2 counties: Baltimore County and Howard County. Most of it falls in Baltimore 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 21163?
Woodstock uses area codes 443, 410 and 667, from NANPA's telephone records.
What time zone is 21163 in?
21163 uses America/New_York.
How many people live in 21163?
About 7,539 people live in ZIP code 21163, in 2,680 households, at 552.8 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 21163?
$134,672 a year, against $103,678 across Maryland.
What ZIP codes are near 21163?
The closest are 21133 (3.4 mi), 21104 (3.5 mi), 21244 (3.8 mi), 21042 (4.9 mi) and 21043 (6.2 mi).
Is 21163 a PO Box ZIP code?
21163 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “21163 ZIP Code — Woodstock, Maryland (Baltimore County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21163
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/21163.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.