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zipcodes.pro — ZIP/20842

20842

ZIP 20842 is Dickerson, Maryland, mostly in Montgomery County; area codes 240 and 301; Eastern time.

Type
Standard
Time zone
America/New_York
County
Montgomery +1 more
Population
2,369
Coordinates
39.1999, -77.4153
☼ Live from 20842 — Dickerson, MD

Weather right now

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Local time: —

Where 20842 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 20842
  • 🔢 Type 20842 into a pocket calculator and turn it upside down: ZhBOZ — not quite a word, sorry.
  • ➕ As a number, 20,842 = 2 × 17 × 613. Its digits add up to 16, a total 1,922 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 101000101101010
  • 🏠 Its numerical neighbours: 20841 (Boyds, MD, 5 mi away) and 20847 (Rockville, MD, 16 mi away).
  • 🔄 Backwards, 20842 becomes 24802, which is not a ZIP code at all.
  • 👥 34 other ZIP codes are made of exactly the same digits (02284, 02482, 02824, 02842, 04228, 04282, …). The farthest-flung twin is 84022 in Dugway, UT, 1,860 miles away.
  • 🧭 Farther north than 50% of all ZIP codes, and farther east than 80%.
  • 🎯1,126 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 20842 and you would come out at 39.20°S, 102.58°E — 897 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 56m of daylight. Shortest: 9h 24m.
  • 📏 At 55.7 square miles of land, 20842 is bigger than 62% of ZIP codes — room for about 42 Central Parks.
🌙 The sky over 20842 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population2,369This ZIP2,369
Households802This ZIP802
Housing units855This ZIP855
Median age48.5This ZIP48.5Maryland39.4US 38.9
Median household income$204,013This ZIP$204,013Maryland$103,678US $80,734
Median home value$745,800This ZIP$745,800Maryland$419,900US $332,700
Median gross rent$1,777This ZIP$1,777Maryland$1,705US $1,413
Bachelor's degree or higher52.0%This ZIP52.0%
Mean commute41.3 minThis ZIP41.3 min
Population density42.6 / sq miThis ZIP42.6 / sq mi

Business and tax activity

Business establishments61This ZIP61
Employees444This ZIP444
Annual payroll$29,284,000This ZIP$29,284,000
Tax returns filed990This ZIP990
Total adjusted gross income$175,957,000This ZIP$175,957,000

Land area

Land area55.65 sq miThis ZIP55.65 sq mi
Water area2.43 sq miThis ZIP2.43 sq mi

Counties 20842 spans

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

CountyShare of this ZIP
Montgomery County 77.5%
Frederick County 22.5%

ZIP codes near 20842

ZIPCityDistance
20839 Beallsville, MD 1.5 mi
20838 Barnesville, MD 2.9 mi
20841 Boyds, MD 5.1 mi
20837 Poolesville, MD 5.8 mi
21790 Tuscarora, MD 6.4 mi
20176 Leesburg, VA 6.5 mi
21710 Adamstown, MD 7.5 mi
20874 Germantown, MD 7.6 mi
21777 Point Of Rocks, MD 8.2 mi
20871 Clarksburg, MD 8.2 mi

Find every ZIP code within 10 miles of 20842 →

Questions about this ZIP code

Where is ZIP code 20842?

20842 is in Dickerson, Maryland, in Montgomery County, part of the Washington-Arlington-Alexandria, DC-VA-MD-WV metropolitan area. Its published point location is 39.1999, -77.4153.

What county is 20842 in?

20842 spans 2 counties: Montgomery County and Frederick 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 area code is 20842?

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

What time zone is 20842 in?

20842 uses America/New_York.

How many people live in 20842?

About 2,369 people live in ZIP code 20842, in 802 households, at 42.6 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 20842?

$204,013 a year, against $103,678 across Maryland.

What ZIP codes are near 20842?

The closest are 20839 (1.5 mi), 20838 (2.9 mi), 20841 (5.1 mi), 20837 (5.8 mi) and 21790 (6.4 mi).

Is 20842 a PO Box ZIP code?

20842 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “20842 ZIP Code — Dickerson, Maryland (Montgomery County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/20842

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