20540
ZIP 20540 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
- 38.8879, -77.0047
Weather right now
Asking the National Weather Service…
Where 20540 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 20540 into a pocket calculator and turn it upside down: OhSOZ — not quite a word, sorry.
- ➕ As a number, 20,540 = 2 × 2 × 5 × 13 × 79. Its digits add up to 11, a total 714 other ZIP codes share.
- 💾In binary, the way a computer stores it:
101000000111100 - 🏠 Its numerical neighbours: 20539 (Washington, DC, 1 mi away) and 20541 (Washington, DC, 0 mi away).
- 🔄 Backwards, 20540 becomes 04502, which is not a ZIP code at all.
- 👥 27 other ZIP codes are made of exactly the same digits (02045, 02054, 02540, 04250, 05042, 05402, …). The farthest-flung twin is 50042 in Brayton, IA, 960 miles away.
- 🧭 Farther south than 52% of all ZIP codes, and farther east than 82%.
- 🎯1,152 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 20540 and you would come out at 38.89°S, 103.00°E — 867 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 54m of daylight. Shortest: 9h 26m.
- 📏 At 0.034 square miles of land, 20540 is bigger than 0% of ZIP codes — about 16 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 | 8This ZIP8 |
|---|---|
| Employees | 101This ZIP101 |
| Annual payroll | $4,581,000This ZIP$4,581,000 |
Land area
| Land area | 0.03 sq miThis ZIP0.03 sq mi |
|---|---|
| Water area | 0.00 sq mi |
Other place names in 20540
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 20540
| ZIP | City | Distance |
|---|---|---|
20541 | Washington, DC | 0.0 mi |
20557 | Washington, DC | 0.0 mi |
20559 | Washington, DC | 0.0 mi |
20515 | Washington, DC | 0.2 mi |
20510 | Washington, DC | 0.4 mi |
20204 | Washington, DC | 0.5 mi |
20216 | Washington, DC | 0.6 mi |
20534 | Washington, DC | 0.6 mi |
20013 | Washington, DC | 0.6 mi |
20026 | Washington, DC | 0.6 mi |
Find every ZIP code within 10 miles of 20540 →
Questions about this ZIP code
Where is ZIP code 20540?
20540 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 38.8879, -77.0047.
What county is 20540 in?
20540 lies in District of Columbia.
What area code is 20540?
Washington uses area codes 202 and 771, from NANPA's telephone records.
What time zone is 20540 in?
20540 uses America/New_York.
How many people live in 20540?
About 0 people live in ZIP code 20540. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.
What ZIP codes are near 20540?
The closest are 20541 (0 mi), 20557 (0 mi), 20559 (0 mi), 20515 (0.2 mi) and 20510 (0.4 mi).
Is 20540 a PO Box ZIP code?
20540 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “20540 ZIP Code — Washington, District of Columbia.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/20540
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/20540.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.