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Where 21890 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 21890 into a pocket calculator and turn it upside down: OGBIZ — not quite a word, sorry.
- ➕ As a number, 21,890 = 2 × 5 × 11 × 199. Its digits add up to 20, a total 2,586 other ZIP codes share.
- 💾In binary, the way a computer stores it:
101010110000010 - 🏠 Its numerical neighbours: 21875 (Delmar, MD, 21 mi away) and 21901 (North East, MD, 99 mi away).
- 🔄 Backwards, 21890 becomes 09812 — and that is a real ZIP code: APO AE, a military post office, 7,081 miles away.
- 👥 59 other ZIP codes are made of exactly the same digits (01982, 02189, 02891, 02918, 08219, 09128, …). The farthest-flung twin is 09812 in APO AE, a military post office, 7,081 miles away.
- 🧭 Farther south than 57% of all ZIP codes, and farther east than 86%.
- 🎯1,231 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 21890 and you would come out at 38.16°S, 104.30°E — 781 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 49m of daylight. Shortest: 9h 30m.
- 📏 At 0.351 square miles of land, 21890 is bigger than 4% of ZIP codes — about 170 football fields.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 3,289This ZIP3,289 |
|---|---|
| Households | 0 |
| Housing units | 0 |
| Median age | 35.8This ZIP35.8Maryland39.4US 38.9 |
| Bachelor's degree or higher | 2.3%This ZIP2.3% |
| Population density | 9,370.4 / sq miThis ZIP9,370.4 / sq mi |
Land area
| Land area | 0.35 sq miThis ZIP0.35 sq mi |
|---|---|
| Water area | 0.01 sq miThis ZIP0.01 sq mi |
ZIP codes near 21890
| ZIP | City | Distance |
|---|---|---|
21853 | Princess Anne, MD | 3.3 mi |
21871 | Westover, MD | 4.2 mi |
21836 | Manokin, MD | 4.2 mi |
21867 | Upper Fairmount, MD | 6.0 mi |
21857 | Rehobeth, MD | 8.5 mi |
21810 | Allen, MD | 9.2 mi |
21822 | Eden, MD | 9.3 mi |
21838 | Marion Station, MD | 9.9 mi |
21851 | Pocomoke City, MD | 10.2 mi |
21865 | Tyaskin, MD | 11.0 mi |
Find every ZIP code within 10 miles of 21890 →
Questions about this ZIP code
Where is ZIP code 21890?
21890 is in Westover, Maryland, in Somerset County, part of the Salisbury, MD metropolitan area. Its published point location is 38.1581, -75.7009.
What county is 21890 in?
21890 lies in Somerset County.
What area code is 21890?
Westover uses area codes 410 and 667, from NANPA's telephone records.
What time zone is 21890 in?
21890 uses America/New_York.
How many people live in 21890?
About 3,289 people live in ZIP code 21890, at 9,370.4 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.
What ZIP codes are near 21890?
The closest are 21853 (3.3 mi), 21871 (4.2 mi), 21836 (4.2 mi), 21867 (6 mi) and 21857 (8.5 mi).
Is 21890 a PO Box ZIP code?
21890 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “21890 ZIP Code — Westover, Maryland (Somerset County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21890
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/21890.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.