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zipcodes.pro — ZIP/21140

21140

ZIP 21140 is Riva, Maryland, in Anne Arundel County; area codes 443, 410 and 667; Eastern time.

Type
Standard
Time zone
America/New_York
County
Anne Arundel
Population
4,417
Coordinates
38.9508, -76.5867
☼ Live from 21140 — Riva, MD

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Local time: —

Where 21140 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 21140
  • 🔢 Type 21140 into a pocket calculator and turn it upside down: OhIIZ — not quite a word, sorry.
  • ➕ As a number, 21,140 = 2 × 2 × 5 × 7 × 151. Its digits add up to 8, a total 251 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 101001010010100
  • 🏠 Its numerical neighbours: 21139 (Riderwood, MD, 32 mi away) and 21144 (Severn, MD, 13 mi away).
  • 🔄 Backwards, 21140 becomes 04112 — and that is a real ZIP code: Portland, ME, 462 miles away.
  • 👥 34 other ZIP codes are made of exactly the same digits (02114, 02141, 04112, 04211, 10124, 11024, …). The farthest-flung twin is 42101 in Bowling Green, KY, 553 miles away.
  • 🧭 Farther south than 51% of all ZIP codes, and farther east than 83%.
  • 🎯1,173 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 21140 and you would come out at 38.95°S, 103.41°E — 850 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 54m of daylight. Shortest: 9h 26m.
  • 📏 At 1.4 square miles of land, 21140 is bigger than 10% of ZIP codes — room for about 1.1 Central Parks.
🌙 The sky over 21140 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population4,417This ZIP4,417
Households1,495This ZIP1,495
Housing units1,527This ZIP1,527
Median age43.6This ZIP43.6Maryland39.4US 38.9
Median household income$170,156This ZIP$170,156Maryland$103,678US $80,734
Median home value$634,700This ZIP$634,700Maryland$419,900US $332,700
Bachelor's degree or higher49.3%This ZIP49.3%
Mean commute33.9 minThis ZIP33.9 min
Population density3,117.1 / sq miThis ZIP3,117.1 / sq mi

Business and tax activity

Business establishments48This ZIP48
Employees253This ZIP253
Annual payroll$12,125,000This ZIP$12,125,000
Tax returns filed1,830This ZIP1,830
Total adjusted gross income$249,059,000This ZIP$249,059,000

Land area

Land area1.42 sq miThis ZIP1.42 sq mi
Water area0.34 sq miThis ZIP0.34 sq mi

Other place names in 21140

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

ZIP codes near 21140

ZIPCityDistance
21062 Glen Burnie, MD 1.7 mi
21123 Pasadena, MD 1.7 mi
21411 Annapolis, MD 1.7 mi
21412 Annapolis, MD 1.7 mi
21035 Davidsonville, MD 2.3 mi
21401 Annapolis, MD 3.1 mi
21037 Edgewater, MD 3.2 mi
20776 Harwood, MD 5.0 mi
21403 Annapolis, MD 5.3 mi
21404 Annapolis, MD 5.4 mi

Find every ZIP code within 10 miles of 21140 →

Questions about this ZIP code

Where is ZIP code 21140?

21140 is in Riva, Maryland, in Anne Arundel County, part of the Baltimore-Columbia-Towson, MD metropolitan area. Its published point location is 38.9508, -76.5867.

What county is 21140 in?

21140 lies in Anne Arundel County.

What area code is 21140?

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

What time zone is 21140 in?

21140 uses America/New_York.

How many people live in 21140?

About 4,417 people live in ZIP code 21140, in 1,495 households, at 3,117.1 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 21140?

$170,156 a year, against $103,678 across Maryland.

What ZIP codes are near 21140?

The closest are 21062 (1.7 mi), 21123 (1.7 mi), 21411 (1.7 mi), 21412 (1.7 mi) and 21035 (2.3 mi).

Is 21140 a PO Box ZIP code?

21140 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “21140 ZIP Code — Riva, Maryland (Anne Arundel County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21140

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