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Where 21036 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.
- 🔢 Type 21036 into a pocket calculator and turn it upside down: gEOIZ — not quite a word, sorry.
- ➕ As a number, 21,036 = 2 × 2 × 3 × 1753. Its digits add up to 12, a total 940 other ZIP codes share.
- 💾In binary, the way a computer stores it:
101001000101100 - 🏠 Its numerical neighbours: 21035 (Davidsonville, MD, 29 mi away) and 21037 (Edgewater, MD, 33 mi away).
- 🔄 Backwards, 21036 becomes 63012 — and that is a real ZIP code: Barnhart, MO, 726 miles away.
- 👥 62 other ZIP codes are made of exactly the same digits (01236, 01263, 02136, 02163, 02361, 02631, …). The farthest-flung twin is 62301 in Quincy, IL, 767 miles away.
- 🧭 Farther north than 50% of all ZIP codes, and farther east than 82%.
- 🎯1,148 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 21036 and you would come out at 39.23°S, 102.99°E — 879 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 56m of daylight. Shortest: 9h 24m.
- 📏 At 6.3 square miles of land, 21036 is bigger than 21% of ZIP codes — room for about 4.7 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 2,569This ZIP2,569 |
|---|---|
| Households | 882This ZIP882 |
| Housing units | 905This ZIP905 |
| Median age | 48.8This ZIP48.8Maryland39.4US 38.9 |
| Median household income | $218,036This ZIP$218,036Maryland$103,678US $80,734 |
| Median home value | $881,300This ZIP$881,300Maryland$419,900US $332,700 |
| Bachelor's degree or higher | 71.3%This ZIP71.3% |
| Mean commute | 32.6 minThis ZIP32.6 min |
| Population density | 410.8 / sq miThis ZIP410.8 / sq mi |
Business and tax activity
| Business establishments | 49This ZIP49 |
|---|---|
| Employees | 263This ZIP263 |
| Annual payroll | $19,493,000This ZIP$19,493,000 |
| Tax returns filed | 1,130This ZIP1,130 |
| Total adjusted gross income | $235,545,000This ZIP$235,545,000 |
Land area
| Land area | 6.25 sq miThis ZIP6.25 sq mi |
|---|---|
| Water area | 0.36 sq miThis ZIP0.36 sq mi |
ZIP codes near 21036
| ZIP | City | Distance |
|---|---|---|
21737 | Glenelg, MD | 1.4 mi |
21029 | Clarksville, MD | 2.9 mi |
21738 | Glenwood, MD | 3.3 mi |
20833 | Brookeville, MD | 3.4 mi |
21041 | Ellicott City, MD | 3.5 mi |
21150 | Simpsonville, MD | 3.5 mi |
20862 | Brinklow, MD | 3.8 mi |
20777 | Highland, MD | 4.6 mi |
21794 | West Friendship, MD | 4.9 mi |
20861 | Ashton, MD | 6.0 mi |
Find every ZIP code within 10 miles of 21036 →
Questions about this ZIP code
Where is ZIP code 21036?
21036 is in Dayton, Maryland, in Howard County, part of the Baltimore-Columbia-Towson, MD metropolitan area. Its published point location is 39.2346, -77.0067.
What county is 21036 in?
21036 lies in Howard County.
What area code is 21036?
Dayton uses area codes 443, 667 and 410, from NANPA's telephone records.
What time zone is 21036 in?
21036 uses America/New_York.
How many people live in 21036?
About 2,569 people live in ZIP code 21036, in 882 households, at 410.8 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 21036?
$218,036 a year, against $103,678 across Maryland.
What ZIP codes are near 21036?
The closest are 21737 (1.4 mi), 21029 (2.9 mi), 21738 (3.3 mi), 20833 (3.4 mi) and 21041 (3.5 mi).
Is 21036 a PO Box ZIP code?
21036 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “21036 ZIP Code — Dayton, Maryland (Howard County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21036
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/21036.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.