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/21645

21645

ZIP 21645 is Kennedyville, Maryland, in Kent County; area codes 667 and 410; Eastern time.

Type
Standard
Time zone
America/New_York
County
Kent
Metro area
none
Population
959
Coordinates
39.3158, -75.9562
☼ Live from 21645 — Kennedyville, MD

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 21645 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 21645
  • 🔢 Type 21645 into a pocket calculator and turn it upside down: ShgIZ — not quite a word, sorry.
  • ➕ As a number, 21,645 = 3 × 3 × 5 × 13 × 37. Its digits add up to 18, a total 2,332 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 101010010001101
  • 🏠 Its numerical neighbours: 21644 (Ingleside, MD, 14 mi away) and 21647 (Mcdaniel, MD, 40 mi away).
  • 🔄 Backwards, 21645 becomes 54612 — and that is a real ZIP code: Arcadia, WI, 869 miles away.
  • 👥 57 other ZIP codes are made of exactly the same digits (12456, 12465, 12546, 12564, 14265, 14526, …). The farthest-flung twin is 56142 in Ivanhoe, MN, 1,098 miles away.
  • 🧭 Farther north than 51% of all ZIP codes, and farther east than 85%.
  • 🎯1,202 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 21645 and you would come out at 39.32°S, 104.04°E — 835 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 56m of daylight. Shortest: 9h 24m.
  • 📏 At 41.8 square miles of land, 21645 is bigger than 55% of ZIP codes — room for about 32 Central Parks.
🌙 The sky over 21645 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population959This ZIP959
Households479This ZIP479
Housing units676This ZIP676
Median age59.2This ZIP59.2Maryland39.4US 38.9
Median household income$86,118This ZIP$86,118Maryland$103,678US $80,734
Median home value$297,900This ZIP$297,900Maryland$419,900US $332,700
Median gross rent$1,172This ZIP$1,172Maryland$1,705US $1,413
Bachelor's degree or higher31.9%This ZIP31.9%
Mean commute20.7 minThis ZIP20.7 min
Population density22.9 / sq miThis ZIP22.9 / sq mi

Business and tax activity

Business establishments30This ZIP30
Employees263This ZIP263
Annual payroll$12,423,000This ZIP$12,423,000
Tax returns filed580This ZIP580
Total adjusted gross income$58,100,000This ZIP$58,100,000

Land area

Land area41.84 sq miThis ZIP41.84 sq mi
Water area3.03 sq miThis ZIP3.03 sq mi

Other place names in 21645

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

ZIP codes near 21645

ZIPCityDistance
21930 Georgetown, MD 5.3 mi
21667 Still Pond, MD 5.5 mi
21628 Crumpton, MD 6.0 mi
21635 Galena, MD 6.0 mi
21651 Millington, MD 6.7 mi
21610 Betterton, MD 7.2 mi
21919 Earleville, MD 7.2 mi
21650 Massey, MD 7.9 mi
21913 Cecilton, MD 8.2 mi
21678 Worton, MD 8.4 mi

Find every ZIP code within 10 miles of 21645 →

Questions about this ZIP code

Where is ZIP code 21645?

21645 is in Kennedyville, Maryland, in Kent County. Its published point location is 39.3158, -75.9562.

What county is 21645 in?

21645 lies in Kent County.

What area code is 21645?

Kennedyville uses area codes 667 and 410, from NANPA's telephone records.

What time zone is 21645 in?

21645 uses America/New_York.

How many people live in 21645?

About 959 people live in ZIP code 21645, in 479 households, at 22.9 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 21645?

$86,118 a year, against $103,678 across Maryland.

What ZIP codes are near 21645?

The closest are 21930 (5.3 mi), 21667 (5.5 mi), 21628 (6 mi), 21635 (6 mi) and 21651 (6.7 mi).

Is 21645 a PO Box ZIP code?

21645 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “21645 ZIP Code — Kennedyville, Maryland (Kent County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21645

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/21645.json

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