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zipcodes.pro — ZIP/21156

21156

ZIP 21156 is Upper Falls, Maryland, in Baltimore County; area codes 410, 443 and 667; Eastern time.

Type
Standard
Time zone
America/New_York
County
Baltimore
Population
204
Coordinates
39.4292, -76.4039
☼ Live from 21156 — Upper Falls, MD

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Local time: —

Where 21156 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 21156
  • 🔢 Type 21156 into a pocket calculator and turn it upside down: gSIIZ — not quite a word, sorry.
  • ➕ As a number, 21,156 = 2 × 2 × 3 × 41 × 43. Its digits add up to 15, a total 1,657 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 101001010100100
  • 🏠 Its numerical neighbours: 21155 (Upperco, MD, 24 mi away) and 21157 (Westminster, MD, 32 mi away).
  • 🔄 Backwards, 21156 becomes 65112, which is not a ZIP code at all.
  • 👥 23 other ZIP codes are made of exactly the same digits (11256, 12156, 12165, 12516, 12561, 15126, …). The farthest-flung twin is 56211 in Beardsley, MN, 1,114 miles away.
  • 🧭 Farther north than 52% of all ZIP codes, and farther east than 84%.
  • 🎯1,177 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 21156 and you would come out at 39.43°S, 103.60°E — 859 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 57m of daylight. Shortest: 9h 23m.
  • 📏 At 1.1 square miles of land, 21156 is bigger than 8% of ZIP codes — about 508 football fields.
🌙 The sky over 21156 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population204This ZIP204
Households65This ZIP65
Housing units65This ZIP65
Median age37.3This ZIP37.3Maryland39.4US 38.9
Median home value$793,800This ZIP$793,800Maryland$419,900US $332,700
Bachelor's degree or higher66.9%This ZIP66.9%
Population density194.3 / sq miThis ZIP194.3 / sq mi

Business and tax activity

Business establishments15This ZIP15
Employees31This ZIP31
Annual payroll$1,179,000This ZIP$1,179,000
Tax returns filed210This ZIP210
Total adjusted gross income$19,563,000This ZIP$19,563,000

Land area

Land area1.05 sq miThis ZIP1.05 sq mi
Water area0.00 sq miThis ZIP0.00 sq mi

Other place names in 21156

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

ZIP codes near 21156

ZIPCityDistance
21087 Kingsville, MD 1.5 mi
21162 White Marsh, MD 2.7 mi
21085 Joppa, MD 2.8 mi
21128 Perry Hall, MD 2.9 mi
21051 Fork, MD 4.1 mi
21027 Chase, MD 4.9 mi
21082 Hydes, MD 5.0 mi
21236 Nottingham, MD 5.1 mi
21018 Benson, MD 5.6 mi
21057 Glen Arm, MD 6.0 mi

Find every ZIP code within 10 miles of 21156 →

Questions about this ZIP code

Where is ZIP code 21156?

21156 is in Upper Falls, Maryland, in Baltimore County, part of the Baltimore-Columbia-Towson, MD metropolitan area. Its published point location is 39.4292, -76.4039.

What county is 21156 in?

21156 lies in Baltimore County.

What area code is 21156?

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

What time zone is 21156 in?

21156 uses America/New_York.

How many people live in 21156?

About 204 people live in ZIP code 21156, in 65 households, at 194.3 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.

What ZIP codes are near 21156?

The closest are 21087 (1.5 mi), 21162 (2.7 mi), 21085 (2.8 mi), 21128 (2.9 mi) and 21051 (4.1 mi).

Is 21156 a PO Box ZIP code?

21156 is a standard ZIP code. A normal ZIP code with street delivery.

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zipcodes.pro. “21156 ZIP Code — Upper Falls, Maryland (Baltimore County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21156

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