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/20904

20904

ZIP 20904 is in Silver Spring, Maryland, mostly in Montgomery County; Eastern time. Silver Spring has 16 ZIP codes in all.

Type
Standard
Time zone
America/New_York
County
Montgomery +1 more
Population
58,646
Coordinates
39.0704, -76.9774
☼ Live from 20904 — Silver Spring, MD

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 20904 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 20904
  • 🔢 Type 20904 into a pocket calculator and turn it upside down: hOGOZ — not quite a word, sorry.
  • ➕ As a number, 20,904 = 2 × 2 × 2 × 3 × 13 × 67. Its digits add up to 15, a total 1,657 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 101000110101000
  • 🏠 Its numerical neighbours: 20903 (Silver Spring, MD, 3 mi away) and 20905 (Silver Spring, MD, 3 mi away).
  • 🔄 Backwards, 20904 becomes 40902 — and that is a real ZIP code: Arjay, KY, 392 miles away.
  • 👥 26 other ZIP codes are made of exactly the same digits (00924, 02904, 02940, 04029, 04092, 04290, …). The farthest-flung twin is 09420 in FPO AE, a military post office, 3,442 miles away.
  • 🧭 Farther south than 50% of all ZIP codes, and farther east than 82%.
  • 🎯1,151 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 20904 and you would come out at 39.07°S, 103.02°E — 872 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 55m of daylight. Shortest: 9h 25m.
  • 📏 At 13.7 square miles of land, 20904 is bigger than 31% of ZIP codes — room for about 10 Central Parks.
🌙 The sky over 20904 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population58,646This ZIP58,646
Households21,212This ZIP21,212
Housing units22,261This ZIP22,261
Median age40.6This ZIP40.6Maryland39.4US 38.9
Median household income$96,025This ZIP$96,025Maryland$103,678US $80,734
Median home value$560,000This ZIP$560,000Maryland$419,900US $332,700
Median gross rent$1,918This ZIP$1,918Maryland$1,705US $1,413
Bachelor's degree or higher50.3%This ZIP50.3%
Mean commute32.7 minThis ZIP32.7 min
Population density4,271.7 / sq miThis ZIP4,271.7 / sq mi

Business and tax activity

Business establishments970This ZIP970
Employees15,865This ZIP15,865
Annual payroll$982,839,000This ZIP$982,839,000
Tax returns filed30,000This ZIP30,000
Total adjusted gross income$2,396,257,000This ZIP$2,396,257,000

Land area

Land area13.73 sq miThis ZIP13.73 sq mi
Water area0.04 sq miThis ZIP0.04 sq mi

Counties 20904 spans

A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.

CountyShare of this ZIP
Montgomery County 97.5%
Prince George's County 2.5%

Other place names in 20904

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

ZIP codes near 20904

ZIPCityDistance
20993 Silver Spring, MD 2.6 mi
20905 Silver Spring, MD 2.8 mi
20903 Silver Spring, MD 3.4 mi
20866 Burtonsville, MD 3.6 mi
20901 Silver Spring, MD 3.8 mi
20868 Spencerville, MD 3.9 mi
20902 Silver Spring, MD 3.9 mi
20906 Silver Spring, MD 4.3 mi
20704 Beltsville, MD 4.5 mi
20705 Beltsville, MD 4.5 mi

Find every ZIP code within 10 miles of 20904 →

Questions about this ZIP code

Where is ZIP code 20904?

20904 is in Silver Spring, Maryland, in Montgomery County, part of the Washington-Arlington-Alexandria, DC-VA-MD-WV metropolitan area. Its published point location is 39.0704, -76.9774.

What county is 20904 in?

20904 spans 2 counties: Montgomery County and Prince George's County. Most of it falls in Montgomery County, measured by overlapping land area — the county holding the most land in a ZIP code is not always the one holding the most residents.

What time zone is 20904 in?

20904 uses America/New_York.

How many people live in 20904?

About 58,646 people live in ZIP code 20904, in 21,212 households, at 4,271.7 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 20904?

$96,025 a year, against $103,678 across Maryland.

What ZIP codes are near 20904?

The closest are 20993 (2.6 mi), 20905 (2.8 mi), 20903 (3.4 mi), 20866 (3.6 mi) and 20901 (3.8 mi).

Is 20904 a PO Box ZIP code?

20904 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “20904 ZIP Code — Silver Spring, Maryland (Montgomery County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/20904

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/20904.json

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