Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — ZIP/20129

20129

ZIP 20129 is Paeonian Springs, Virginia, in Loudoun County; area codes 571 and 703; Eastern time.

Type
Standard
Time zone
America/New_York
County
Loudoun
Population
538
Coordinates
39.1634, -77.5932
☼ Live from 20129 — Paeonian Springs, VA

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 20129 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.

★ Weird and wonderful facts about 20129
  • 🔢 Type 20129 into a pocket calculator and turn it upside down: GZIOZ — not quite a word, sorry.
  • ➕ 20129 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 14, a total 1,416 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 100111010100001
  • 🏠 Its numerical neighbours: 20128 (Orlean, VA, 36 mi away) and 20130 (Paris, VA, 21 mi away).
  • 🔄 Backwards, 20129 becomes 92102 — and that is a real ZIP code: San Diego, CA, 2,237 miles away.
  • 👥 36 other ZIP codes are made of exactly the same digits (01229, 01922, 02129, 02912, 02921, 09212, …). The farthest-flung twin is 09212 in APO AE, a military post office, 4,071 miles away.
  • 🧭 Farther north than 50% of all ZIP codes, and farther east than 79%.
  • 🎯1,117 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 20129 and you would come out at 39.16°S, 102.41°E — 904 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 55m of daylight. Shortest: 9h 25m.
  • 📏 At 4.3 square miles of land, 20129 is bigger than 17% of ZIP codes — room for about 3.3 Central Parks.
🌙 The sky over 20129 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population538This ZIP538
Households162This ZIP162
Housing units162This ZIP162
Median age42.8This ZIP42.8Virginia39.0US 38.9
Median household income$250,000+This ZIP$250,000+Virginia$93,170US $80,734
Median home value$1,238,300This ZIP$1,238,300Virginia$383,700US $332,700
Bachelor's degree or higher96.4%This ZIP96.4%
Mean commute36.4 minThis ZIP36.4 min
Population density125.6 / sq miThis ZIP125.6 / sq mi

Business and tax activity

Business establishments20This ZIP20
Employees159This ZIP159
Annual payroll$10,560,000This ZIP$10,560,000
Tax returns filed330This ZIP330
Total adjusted gross income$85,893,000This ZIP$85,893,000

Land area

Land area4.28 sq miThis ZIP4.28 sq mi
Water area0.01 sq miThis ZIP0.01 sq mi

ZIP codes near 20129

ZIPCityDistance
20197 Waterford, VA 2.9 mi
20176 Leesburg, VA 3.4 mi
20177 Leesburg, VA 3.7 mi
20178 Leesburg, VA 3.7 mi
20158 Hamilton, VA 3.9 mi
20159 Hamilton, VA 4.2 mi
20134 Purcellville, VA 5.9 mi
20102 Dulles, VA 6.1 mi
20104 Dulles, VA 6.1 mi
20146 Ashburn, VA 6.1 mi

Find every ZIP code within 10 miles of 20129 →

Questions about this ZIP code

Where is ZIP code 20129?

20129 is in Paeonian Springs, Virginia, in Loudoun County, part of the Washington-Arlington-Alexandria, DC-VA-MD-WV metropolitan area. Its published point location is 39.1634, -77.5932.

What county is 20129 in?

20129 lies in Loudoun County.

What area code is 20129?

Paeonian Springs uses area codes 571 and 703, from NANPA's telephone records.

What time zone is 20129 in?

20129 uses America/New_York.

How many people live in 20129?

About 538 people live in ZIP code 20129, in 162 households, at 125.6 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 20129?

$250,000+ a year, against $93,170 across Virginia.

What ZIP codes are near 20129?

The closest are 20197 (2.9 mi), 20176 (3.4 mi), 20177 (3.7 mi), 20178 (3.7 mi) and 20158 (3.9 mi).

Is 20129 a PO Box ZIP code?

20129 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “20129 ZIP Code — Paeonian Springs, Virginia (Loudoun County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/20129

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/20129.json

Underlying data is public domain or openly licensed — sources, vintages and licences.