20551
ZIP 20551 is in Washington, District of Columbia; area codes 202 and 771; Eastern time. Washington has 271 ZIP codes in all.
- Type
- Standard
- Time zone
- America/New_York
- County
- District of Columbia
- Metro area
- Washington-Arlington-Alexandria, DC-VA-MD-WV
- Population
- 0
- Coordinates
- 38.8928, -77.0458
Weather right now
Asking the National Weather Service…
Where 20551 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 20551 into a pocket calculator and turn it upside down: ISSOZ — not quite a word, sorry.
- ➕ 20551 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:
101000001000111 - 🏠 Its numerical neighbours: 20549 (Washington, DC, 2 mi away) and 20552 (Washington, DC, 2 mi away).
- 🔄 Backwards, 20551 becomes 15502 — and that is a real ZIP code: Hidden Valley, PA, 141 miles away.
- 👥 36 other ZIP codes are made of exactly the same digits (01255, 01525, 02155, 05152, 05251, 10552, …). The farthest-flung twin is 51250 in Sioux Center, IA, 1,038 miles away.
- 🧭 Farther south than 52% of all ZIP codes, and farther east than 81%.
- 🎯1,149 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 20551 and you would come out at 38.89°S, 102.95°E — 869 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 54m of daylight. Shortest: 9h 26m.
- 📏 At 0.009 square miles of land, 20551 is bigger than 0% of ZIP codes — about 4 football fields.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 0 |
|---|---|
| Households | 0 |
| Housing units | 0 |
| Population density | 0.0 / sq mi |
Business and tax activity
| Business establishments | 5This ZIP5 |
|---|---|
| Employees | 25This ZIP25 |
| Annual payroll | $1,554,000This ZIP$1,554,000 |
Land area
| Land area | 0.01 sq miThis ZIP0.01 sq mi |
|---|---|
| Water area | 0.00 sq mi |
Other place names in 20551
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 20551
| ZIP | City | Distance |
|---|---|---|
20245 | Washington, DC | 0.1 mi |
20418 | Washington, DC | 0.1 mi |
20523 | Washington, DC | 0.2 mi |
20415 | Washington, DC | 0.2 mi |
20522 | Washington, DC | 0.2 mi |
20520 | Washington, DC | 0.2 mi |
20240 | Washington, DC | 0.2 mi |
20451 | Washington, DC | 0.3 mi |
20052 | Washington, DC | 0.4 mi |
20037 | Washington, DC | 0.4 mi |
Find every ZIP code within 10 miles of 20551 →
Questions about this ZIP code
Where is ZIP code 20551?
20551 is in Washington, District of Columbia, in District of Columbia, part of the Washington-Arlington-Alexandria, DC-VA-MD-WV metropolitan area. Its published point location is 38.8928, -77.0458.
What county is 20551 in?
20551 lies in District of Columbia.
What area code is 20551?
Washington uses area codes 202 and 771, from NANPA's telephone records.
What time zone is 20551 in?
20551 uses America/New_York.
How many people live in 20551?
About 0 people live in ZIP code 20551. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.
What ZIP codes are near 20551?
The closest are 20245 (0.1 mi), 20418 (0.1 mi), 20523 (0.2 mi), 20415 (0.2 mi) and 20522 (0.2 mi).
Is 20551 a PO Box ZIP code?
20551 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “20551 ZIP Code — Washington, District of Columbia.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/20551
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/20551.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.