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zipcodes.pro — ZIP/20689

20689

ZIP 20689 is Sunderland, Maryland, in Calvert County; area codes 443, 410 and 667; Eastern time.

Type
Standard
Time zone
America/New_York
County
Calvert
Metro area
Lexington Park, MD
Population
1,809
Coordinates
38.6703, -76.5859
☼ Live from 20689 — Sunderland, MD

Weather right now

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Local time: —

Where 20689 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 20689
  • 🔢 Type 20689 into a pocket calculator and turn it upside down: GBgOZ — not quite a word, sorry.
  • ➕ As a number, 20,689 = 17 × 1217. Its digits add up to 25, a total 2,242 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 101000011010001
  • 🏠 Its numerical neighbours: 20688 (Solomons, MD, 25 mi away) and 20690 (Tall Timbers, MD, 35 mi away).
  • 🔄 Backwards, 20689 becomes 98602 — and that is a real ZIP code: Appleton, WA, 2,307 miles away.
  • 👥 42 other ZIP codes are made of exactly the same digits (02896, 06829, 08629, 09628, 09682, 09826, …). The farthest-flung twin is 96208 in APO AA, a military post office, 6,927 miles away.
  • 🧭 Farther south than 54% of all ZIP codes, and farther east than 83%.
  • 🎯1,177 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 20689 and you would come out at 38.67°S, 103.41°E — 840 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 52m of daylight. Shortest: 9h 27m.
  • 📏 At 7.7 square miles of land, 20689 is bigger than 24% of ZIP codes — room for about 5.9 Central Parks.
🌙 The sky over 20689 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population1,809This ZIP1,809
Households618This ZIP618
Housing units618This ZIP618
Median age48.1This ZIP48.1Maryland39.4US 38.9
Median household income$161,833This ZIP$161,833Maryland$103,678US $80,734
Median home value$490,500This ZIP$490,500Maryland$419,900US $332,700
Bachelor's degree or higher29.8%This ZIP29.8%
Mean commute38.8 minThis ZIP38.8 min
Population density234.7 / sq miThis ZIP234.7 / sq mi

Business and tax activity

Business establishments34This ZIP34
Employees142This ZIP142
Annual payroll$6,546,000This ZIP$6,546,000
Tax returns filed940This ZIP940
Total adjusted gross income$111,108,000This ZIP$111,108,000

Land area

Land area7.71 sq miThis ZIP7.71 sq mi
Water area0.02 sq miThis ZIP0.02 sq mi

Other place names in 20689

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

ZIP codes near 20689

ZIPCityDistance
20736 Owings, MD 2.2 mi
20732 Chesapeake Beach, MD 2.6 mi
20714 North Beach, MD 3.7 mi
20758 Friendship, MD 4.4 mi
20639 Huntingtown, MD 4.9 mi
20754 Dunkirk, MD 5.7 mi
20779 Tracys Landing, MD 6.2 mi
20751 Deale, MD 8.7 mi
20608 Aquasco, MD 8.7 mi
20711 Lothian, MD 9.6 mi

Find every ZIP code within 10 miles of 20689 →

Questions about this ZIP code

Where is ZIP code 20689?

20689 is in Sunderland, Maryland, in Calvert County, part of the Lexington Park, MD metropolitan area. Its published point location is 38.6703, -76.5859.

What county is 20689 in?

20689 lies in Calvert County.

What area code is 20689?

Sunderland uses area codes 443, 410 and 667, from NANPA's telephone records.

What time zone is 20689 in?

20689 uses America/New_York.

How many people live in 20689?

About 1,809 people live in ZIP code 20689, in 618 households, at 234.7 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 20689?

$161,833 a year, against $103,678 across Maryland.

What ZIP codes are near 20689?

The closest are 20736 (2.2 mi), 20732 (2.6 mi), 20714 (3.7 mi), 20758 (4.4 mi) and 20639 (4.9 mi).

Is 20689 a PO Box ZIP code?

20689 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “20689 ZIP Code — Sunderland, Maryland (Calvert County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/20689

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