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Where 21875 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 21875 into a pocket calculator and turn it upside down: SLBIZ — not quite a word, sorry.
- ➕ As a number, 21,875 = 5 × 5 × 5 × 5 × 5 × 7. Its digits add up to 23, a total 2,533 other ZIP codes share.
- 💾In binary, the way a computer stores it:
101010101110011 - 🏠 Its numerical neighbours: 21874 (Willards, MD, 11 mi away) and 21890 (Westover, MD, 21 mi away).
- 🔄 Backwards, 21875 becomes 57812, which is not a ZIP code at all.
- 👥 48 other ZIP codes are made of exactly the same digits (12578, 12758, 12785, 12857, 15278, 15728, …). The farthest-flung twin is 85172 in Stanfield, AZ, 2,065 miles away.
- 🧭 Farther south than 55% of all ZIP codes, and farther east than 86%.
- 🎯1,235 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 21875 and you would come out at 38.44°S, 104.46°E — 784 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 51m of daylight. Shortest: 9h 29m.
- 📏 At 24.4 square miles of land, 21875 is bigger than 41% of ZIP codes — room for about 18 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 7,646This ZIP7,646 |
|---|---|
| Households | 3,173This ZIP3,173 |
| Housing units | 3,446This ZIP3,446 |
| Median age | 38.3This ZIP38.3Maryland39.4US 38.9 |
| Median household income | $83,665This ZIP$83,665Maryland$103,678US $80,734 |
| Median home value | $234,500This ZIP$234,500Maryland$419,900US $332,700 |
| Median gross rent | $1,559This ZIP$1,559Maryland$1,705US $1,413 |
| Bachelor's degree or higher | 23.0%This ZIP23.0% |
| Mean commute | 21.9 minThis ZIP21.9 min |
| Population density | 313.8 / sq miThis ZIP313.8 / sq mi |
Business and tax activity
| Business establishments | 105This ZIP105 |
|---|---|
| Employees | 761This ZIP761 |
| Annual payroll | $36,496,000This ZIP$36,496,000 |
| Tax returns filed | 3,450This ZIP3,450 |
| Total adjusted gross income | $215,948,000This ZIP$215,948,000 |
Land area
| Land area | 24.36 sq miThis ZIP24.36 sq mi |
|---|---|
| Water area | 0.12 sq miThis ZIP0.12 sq mi |
Other place names in 21875
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 21875
| ZIP | City | Distance |
|---|---|---|
19940 | Delmar, DE | 2.8 mi |
21802 | Salisbury, MD | 5.7 mi |
21803 | Salisbury, MD | 5.7 mi |
21849 | Parsonsburg, MD | 7.1 mi |
19956 | Laurel, DE | 7.4 mi |
21804 | Salisbury, MD | 8.7 mi |
21826 | Fruitland, MD | 9.4 mi |
21801 | Salisbury, MD | 9.6 mi |
19931 | Bethel, DE | 9.6 mi |
21850 | Pittsville, MD | 9.7 mi |
Find every ZIP code within 10 miles of 21875 →
Questions about this ZIP code
Where is ZIP code 21875?
21875 is in Delmar, Maryland, in Wicomico County, part of the Salisbury, MD metropolitan area. Its published point location is 38.4400, -75.5447.
What county is 21875 in?
21875 lies in Wicomico County.
What area code is 21875?
Delmar uses area codes 443, 667 and 410, from NANPA's telephone records.
What time zone is 21875 in?
21875 uses America/New_York.
How many people live in 21875?
About 7,646 people live in ZIP code 21875, in 3,173 households, at 313.8 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 21875?
$83,665 a year, against $103,678 across Maryland.
What ZIP codes are near 21875?
The closest are 19940 (2.8 mi), 21802 (5.7 mi), 21803 (5.7 mi), 21849 (7.1 mi) and 19956 (7.4 mi).
Is 21875 a PO Box ZIP code?
21875 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “21875 ZIP Code — Delmar, Maryland (Wicomico County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21875
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/21875.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.