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Where 21635 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 21635 into a pocket calculator and turn it upside down: SEgIZ — not quite a word, sorry.
- ➕ As a number, 21,635 = 5 × 4327. Its digits add up to 17, a total 2,133 other ZIP codes share.
- 💾In binary, the way a computer stores it:
101010010000011 - 🏠 Its numerical neighbours: 21634 (Fishing Creek, MD, 75 mi away) and 21636 (Goldsboro, MD, 22 mi away).
- 🔄 Backwards, 21635 becomes 53612, which is not a ZIP code at all.
- 👥 55 other ZIP codes are made of exactly the same digits (12563, 13625, 13652, 15236, 15362, 15623, …). The farthest-flung twin is 56231 in Danvers, MN, 1,094 miles away.
- 🧭 Farther north than 51% of all ZIP codes, and farther east than 85%.
- 🎯1,208 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 21635 and you would come out at 39.33°S, 104.15°E — 831 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 57m of daylight. Shortest: 9h 24m.
- 📏 At 30.8 square miles of land, 21635 is bigger than 46% of ZIP codes — room for about 23 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 2,085This ZIP2,085 |
|---|---|
| Households | 940This ZIP940 |
| Housing units | 1,177This ZIP1,177 |
| Median age | 50.3This ZIP50.3Maryland39.4US 38.9 |
| Median household income | $101,618This ZIP$101,618Maryland$103,678US $80,734 |
| Median home value | $402,000This ZIP$402,000Maryland$419,900US $332,700 |
| Median gross rent | $1,088This ZIP$1,088Maryland$1,705US $1,413 |
| Bachelor's degree or higher | 38.2%This ZIP38.2% |
| Mean commute | 26.8 minThis ZIP26.8 min |
| Population density | 67.8 / sq miThis ZIP67.8 / sq mi |
Business and tax activity
| Business establishments | 45This ZIP45 |
|---|---|
| Employees | 192This ZIP192 |
| Annual payroll | $7,158,000This ZIP$7,158,000 |
| Tax returns filed | 1,020This ZIP1,020 |
| Total adjusted gross income | $104,196,000This ZIP$104,196,000 |
Land area
| Land area | 30.77 sq miThis ZIP30.77 sq mi |
|---|---|
| Water area | 1.56 sq miThis ZIP1.56 sq mi |
Other place names in 21635
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 21635
| ZIP | City | Distance |
|---|---|---|
21650 | Massey, MD | 2.6 mi |
21930 | Georgetown, MD | 3.3 mi |
21651 | Millington, MD | 5.5 mi |
21913 | Cecilton, MD | 5.6 mi |
21645 | Kennedyville, MD | 6.0 mi |
21912 | Warwick, MD | 6.0 mi |
21919 | Earleville, MD | 7.4 mi |
21628 | Crumpton, MD | 8.1 mi |
19938 | Clayton, DE | 9.6 mi |
21668 | Sudlersville, MD | 10.0 mi |
Find every ZIP code within 10 miles of 21635 →
Questions about this ZIP code
Where is ZIP code 21635?
21635 is in Galena, Maryland, in Kent County. Its published point location is 39.3348, -75.8466.
What county is 21635 in?
21635 lies in Kent County.
What area code is 21635?
Galena uses area codes 667 and 410, from NANPA's telephone records.
What time zone is 21635 in?
21635 uses America/New_York.
How many people live in 21635?
About 2,085 people live in ZIP code 21635, in 940 households, at 67.8 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 21635?
$101,618 a year, against $103,678 across Maryland.
What ZIP codes are near 21635?
The closest are 21650 (2.6 mi), 21930 (3.3 mi), 21651 (5.5 mi), 21913 (5.6 mi) and 21645 (6 mi).
Is 21635 a PO Box ZIP code?
21635 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “21635 ZIP Code — Galena, Maryland (Kent County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21635
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/21635.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.