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Where 21629 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 21629 into a pocket calculator and turn it upside down: GZgIZ — not quite a word, sorry.
- ➕ As a number, 21,629 = 43 × 503. Its digits add up to 20, a total 2,586 other ZIP codes share.
- 💾In binary, the way a computer stores it:
101010001111101 - 🏠 Its numerical neighbours: 21628 (Crumpton, MD, 26 mi away) and 21631 (East New Market, MD, 20 mi away).
- 🔄 Backwards, 21629 becomes 92612 — and that is a real ZIP code: Irvine, CA, 2,347 miles away.
- 👥 23 other ZIP codes are made of exactly the same digits (12926, 12962, 16229, 16922, 26219, 26291, …). The farthest-flung twin is 96212 in APO AA, a military post office, 7,044 miles away.
- 🧭 Farther south than 52% of all ZIP codes, and farther east than 85%.
- 🎯1,214 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 21629 and you would come out at 38.86°S, 104.17°E — 812 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 54m of daylight. Shortest: 9h 26m.
- 📏 At 83.6 square miles of land, 21629 is bigger than 74% of ZIP codes — room for about 63 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 10,252This ZIP10,252 |
|---|---|
| Households | 3,688This ZIP3,688 |
| Housing units | 3,977This ZIP3,977 |
| Median age | 40.0This ZIP40.0Maryland39.4US 38.9 |
| Median household income | $73,956This ZIP$73,956Maryland$103,678US $80,734 |
| Median home value | $334,200This ZIP$334,200Maryland$419,900US $332,700 |
| Median gross rent | $1,133This ZIP$1,133Maryland$1,705US $1,413 |
| Bachelor's degree or higher | 17.3%This ZIP17.3% |
| Mean commute | 31.9 minThis ZIP31.9 min |
| Population density | 122.6 / sq miThis ZIP122.6 / sq mi |
Business and tax activity
| Business establishments | 259This ZIP259 |
|---|---|
| Employees | 2,698This ZIP2,698 |
| Annual payroll | $120,010,000This ZIP$120,010,000 |
| Tax returns filed | 4,710This ZIP4,710 |
| Total adjusted gross income | $330,849,000This ZIP$330,849,000 |
Land area
| Land area | 83.62 sq miThis ZIP83.62 sq mi |
|---|---|
| Water area | 2.38 sq miThis ZIP2.38 sq mi |
Other place names in 21629
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 21629
| ZIP | City | Distance |
|---|---|---|
21639 | Greensboro, MD | 7.3 mi |
21641 | Hillsboro, MD | 7.5 mi |
21660 | Ridgely, MD | 7.6 mi |
21625 | Cordova, MD | 8.4 mi |
21655 | Preston, MD | 9.2 mi |
21632 | Federalsburg, MD | 9.2 mi |
21657 | Queen Anne, MD | 10.0 mi |
21609 | Bethlehem, MD | 10.9 mi |
21636 | Goldsboro, MD | 10.9 mi |
19952 | Harrington, DE | 12.1 mi |
Find every ZIP code within 10 miles of 21629 →
Questions about this ZIP code
Where is ZIP code 21629?
21629 is in Denton, Maryland, in Caroline County. Its published point location is 38.8587, -75.8251.
What county is 21629 in?
21629 lies in Caroline County.
What area code is 21629?
Denton uses area codes 667, 410 and 443, from NANPA's telephone records.
What time zone is 21629 in?
21629 uses America/New_York.
How many people live in 21629?
About 10,252 people live in ZIP code 21629, in 3,688 households, at 122.6 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 21629?
$73,956 a year, against $103,678 across Maryland.
What ZIP codes are near 21629?
The closest are 21639 (7.3 mi), 21641 (7.5 mi), 21660 (7.6 mi), 21625 (8.4 mi) and 21655 (9.2 mi).
Is 21629 a PO Box ZIP code?
21629 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “21629 ZIP Code — Denton, Maryland (Caroline County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21629
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/21629.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.