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/20155

20155

ZIP 20155 is in Gainesville, Virginia, in Prince William County; area codes 571 and 703; Eastern time. Gainesville has 2 ZIP codes; the other is 20156.

Type
Standard
Time zone
America/New_York
Population
37,486
Coordinates
38.8067, -77.6214
☼ Live from 20155 — Gainesville, VA

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 20155 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 20155
  • 🔢 Type 20155 into a pocket calculator and turn it upside down: SSIOZ — not quite a word, sorry.
  • ➕ As a number, 20,155 = 5 × 29 × 139. Its digits add up to 13, a total 1,179 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 100111010111011
  • 🏠 Its numerical neighbours: 20153 (Chantilly, VA, 18 mi away) and 20156 (Gainesville, VA, 10 mi away).
  • 🔄 Backwards, 20155 becomes 55102 — and that is a real ZIP code: Saint Paul, MN, 901 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, 1,012 miles away.
  • 🧭 Farther south than 53% of all ZIP codes, and farther east than 79%.
  • 🎯1,120 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 20155 and you would come out at 38.81°S, 102.38°E — 894 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 53m of daylight. Shortest: 9h 27m.
  • 📏 At 25.5 square miles of land, 20155 is bigger than 42% of ZIP codes — room for about 19 Central Parks.
🌙 The sky over 20155 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population37,486This ZIP37,486
Households12,660This ZIP12,660
Housing units13,004This ZIP13,004
Median age40.4This ZIP40.4Virginia39.0US 38.9
Median household income$164,279This ZIP$164,279Virginia$93,170US $80,734
Median home value$659,100This ZIP$659,100Virginia$383,700US $332,700
Median gross rent$2,642This ZIP$2,642Virginia$1,579US $1,413
Bachelor's degree or higher57.2%This ZIP57.2%
Mean commute33.3 minThis ZIP33.3 min
Population density1,471.5 / sq miThis ZIP1,471.5 / sq mi

Business and tax activity

Business establishments912This ZIP912
Employees15,049This ZIP15,049
Annual payroll$712,740,000This ZIP$712,740,000
Tax returns filed17,710This ZIP17,710
Total adjusted gross income$2,321,817,000This ZIP$2,321,817,000

Land area

Land area25.48 sq miThis ZIP25.48 sq mi
Water area0.88 sq miThis ZIP0.88 sq mi

Other place names in 20155

Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.

ZIP codes near 20155

ZIPCityDistance
20168 Haymarket, VA 0.9 mi
20169 Haymarket, VA 4.6 mi
20109 Manassas, VA 4.9 mi
20137 Broad Run, VA 5.4 mi
20143 Catharpin, VA 5.7 mi
20136 Bristow, VA 6.7 mi
20182 Nokesville, VA 7.6 mi
20120 Centreville, VA 8.2 mi
20110 Manassas, VA 8.3 mi
20108 Manassas, VA 8.4 mi

Find every ZIP code within 10 miles of 20155 →

Questions about this ZIP code

Where is ZIP code 20155?

20155 is in Gainesville, Virginia, in Prince William County, part of the Washington-Arlington-Alexandria, DC-VA-MD-WV metropolitan area. Its published point location is 38.8067, -77.6214.

What county is 20155 in?

20155 lies in Prince William County.

What area code is 20155?

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

What time zone is 20155 in?

20155 uses America/New_York.

How many people live in 20155?

About 37,486 people live in ZIP code 20155, in 12,660 households, at 1,471.5 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 20155?

$164,279 a year, against $93,170 across Virginia.

What ZIP codes are near 20155?

The closest are 20168 (0.9 mi), 20169 (4.6 mi), 20109 (4.9 mi), 20137 (5.4 mi) and 20143 (5.7 mi).

Is 20155 a PO Box ZIP code?

20155 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “20155 ZIP Code — Gainesville, Virginia (Prince William County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/20155

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/20155.json

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