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/21702

21702

ZIP 21702 is in Frederick, Maryland, in Frederick County; area codes 240, 301 and 227; Eastern time. Frederick has 6 ZIP codes; the others are 21701, 21703, 21704, 21705 and 21709.

Type
Standard
Time zone
America/New_York
County
Frederick
Population
49,605
Coordinates
39.4793, -77.4432
☼ Live from 21702 — Frederick, MD

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 21702 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 21702
  • 🔢 Type 21702 into a pocket calculator and turn it upside down: ZOLIZ — not quite a word, sorry.
  • ➕ As a number, 21,702 = 2 × 3 × 3617. Its digits add up to 12, a total 940 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 101010011000110
  • 🏠 Its numerical neighbours: 21701 (Frederick, MD, 6 mi away) and 21703 (Frederick, MD, 8 mi away).
  • 🔄 Backwards, 21702 becomes 20712 — and that is a real ZIP code: Mount Rainier, MD, 45 miles away.
  • 👥 37 other ZIP codes are made of exactly the same digits (01227, 02127, 02217, 02712, 02721, 10272, …). The farthest-flung twin is 70122 in New Orleans, LA, 969 miles away.
  • 🧭 Farther north than 52% of all ZIP codes, and farther east than 80%.
  • 🎯1,122 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 21702 and you would come out at 39.48°S, 102.56°E — 908 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 58m of daylight. Shortest: 9h 23m.
  • 📏 At 41.7 square miles of land, 21702 is bigger than 55% of ZIP codes — room for about 32 Central Parks.
🌙 The sky over 21702 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population49,605This ZIP49,605
Households18,525This ZIP18,525
Housing units19,462This ZIP19,462
Median age38.1This ZIP38.1Maryland39.4US 38.9
Median household income$106,983This ZIP$106,983Maryland$103,678US $80,734
Median home value$426,300This ZIP$426,300Maryland$419,900US $332,700
Median gross rent$1,770This ZIP$1,770Maryland$1,705US $1,413
Bachelor's degree or higher41.4%This ZIP41.4%
Mean commute31.2 minThis ZIP31.2 min
Population density1,189.0 / sq miThis ZIP1,189.0 / sq mi

Business and tax activity

Business establishments880This ZIP880
Employees12,976This ZIP12,976
Annual payroll$782,173,000This ZIP$782,173,000
Tax returns filed24,370This ZIP24,370
Total adjusted gross income$2,048,943,000This ZIP$2,048,943,000

Land area

Land area41.72 sq miThis ZIP41.72 sq mi
Water area0.11 sq miThis ZIP0.11 sq mi

Other place names in 21702

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

ZIP codes near 21702

ZIPCityDistance
21709 Frederick, MD 2.8 mi
21705 Frederick, MD 5.2 mi
21793 Walkersville, MD 5.3 mi
21714 Braddock Heights, MD 5.9 mi
21701 Frederick, MD 6.4 mi
21769 Middletown, MD 7.2 mi
21773 Myersville, MD 7.2 mi
21788 Thurmont, MD 7.8 mi
21703 Frederick, MD 7.9 mi
21798 Woodsboro, MD 8.9 mi

Find every ZIP code within 10 miles of 21702 →

Questions about this ZIP code

Where is ZIP code 21702?

21702 is in Frederick, Maryland, in Frederick County, part of the Washington-Arlington-Alexandria, DC-VA-MD-WV metropolitan area. Its published point location is 39.4793, -77.4432.

What county is 21702 in?

21702 lies in Frederick County.

What area code is 21702?

Frederick uses area codes 240, 301 and 227, from NANPA's telephone records.

What time zone is 21702 in?

21702 uses America/New_York.

How many people live in 21702?

About 49,605 people live in ZIP code 21702, in 18,525 households, at 1,189.0 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 21702?

$106,983 a year, against $103,678 across Maryland.

What ZIP codes are near 21702?

The closest are 21709 (2.8 mi), 21705 (5.2 mi), 21793 (5.3 mi), 21714 (5.9 mi) and 21701 (6.4 mi).

Is 21702 a PO Box ZIP code?

21702 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “21702 ZIP Code — Frederick, Maryland (Frederick County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21702

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/21702.json

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