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zipcodes.pro — ZIP/21797

21797

ZIP 21797 is Woodbine, Maryland, mostly in Howard County; Eastern time.

Type
Standard
Time zone
America/New_York
County
Howard +2 more
Population
8,643
Coordinates
39.3312, -77.0686
☼ Live from 21797 — Woodbine, MD

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Local time: —

Where 21797 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 21797
  • 🔢 Type 21797 into a pocket calculator and turn it upside down: LGLIZ — not quite a word, sorry.
  • ➕ As a number, 21,797 = 71 × 307. Its digits add up to 26, a total 2,038 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 101010100100101
  • 🏠 Its numerical neighbours: 21795 (Williamsport, MD, 44 mi away) and 21798 (Woodsboro, MD, 19 mi away).
  • 🔄 Backwards, 21797 becomes 79712 — and that is a real ZIP code: Midland, TX, 1,488 miles away.
  • 👥 24 other ZIP codes are made of exactly the same digits (12779, 12977, 17729, 17972, 21779, 27917, …). The farthest-flung twin is 97127 in Lafayette, OR, 2,356 miles away.
  • 🧭 Farther north than 51% of all ZIP codes, and farther east than 81%.
  • 🎯1,143 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 21797 and you would come out at 39.33°S, 102.93°E — 886 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 57m of daylight. Shortest: 9h 24m.
  • 📏 At 43.7 square miles of land, 21797 is bigger than 56% of ZIP codes — room for about 33 Central Parks.
🌙 The sky over 21797 today
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🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population8,643This ZIP8,643
Households2,849This ZIP2,849
Housing units2,903This ZIP2,903
Median age45.3This ZIP45.3Maryland39.4US 38.9
Median household income$189,241This ZIP$189,241Maryland$103,678US $80,734
Median home value$735,600This ZIP$735,600Maryland$419,900US $332,700
Median gross rent$1,535This ZIP$1,535Maryland$1,705US $1,413
Bachelor's degree or higher51.5%This ZIP51.5%
Mean commute38.9 minThis ZIP38.9 min
Population density197.8 / sq miThis ZIP197.8 / sq mi

Business and tax activity

Business establishments261This ZIP261
Employees1,955This ZIP1,955
Annual payroll$127,517,000This ZIP$127,517,000
Tax returns filed4,620This ZIP4,620
Total adjusted gross income$738,810,000This ZIP$738,810,000

Land area

Land area43.69 sq miThis ZIP43.69 sq mi
Water area0.23 sq miThis ZIP0.23 sq mi

Counties 21797 spans

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

CountyShare of this ZIP
Howard County 66.9%
Carroll County 31.8%
Montgomery County 1.3%

Other place names in 21797

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

ZIP codes near 21797

ZIPCityDistance
21765 Lisbon, MD 0.5 mi
21723 Cooksville, MD 3.5 mi
21738 Glenwood, MD 4.2 mi
21794 West Friendship, MD 5.9 mi
21737 Glenelg, MD 6.1 mi
21771 Mount Airy, MD 6.5 mi
21784 Sykesville, MD 7.0 mi
21036 Dayton, MD 7.4 mi
20872 Damascus, MD 7.7 mi
20833 Brookeville, MD 8.4 mi

Find every ZIP code within 10 miles of 21797 →

Questions about this ZIP code

Where is ZIP code 21797?

21797 is in Woodbine, Maryland, in Howard County, part of the Baltimore-Columbia-Towson, MD metropolitan area. Its published point location is 39.3312, -77.0686.

What county is 21797 in?

21797 spans 3 counties: Howard County, Carroll County and Montgomery County. Most of it falls in Howard 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 time zone is 21797 in?

21797 uses America/New_York.

How many people live in 21797?

About 8,643 people live in ZIP code 21797, in 2,849 households, at 197.8 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 21797?

$189,241 a year, against $103,678 across Maryland.

What ZIP codes are near 21797?

The closest are 21765 (0.5 mi), 21723 (3.5 mi), 21738 (4.2 mi), 21794 (5.9 mi) and 21737 (6.1 mi).

Is 21797 a PO Box ZIP code?

21797 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “21797 ZIP Code — Woodbine, Maryland (Howard County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21797

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