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Where 21023 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 21023 into a pocket calculator and turn it upside down: EZOIZ — not quite a word, sorry.
- ➕ 21023 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 8, a total 251 other ZIP codes share.
- 💾In binary, the way a computer stores it:
101001000011111 - 🏠 Its numerical neighbours: 21022 (Brooklandville, MD, 9 mi away) and 21027 (Chase, MD, 23 mi away).
- 🔄 Backwards, 21023 becomes 32012, which is not a ZIP code at all.
- 👥 33 other ZIP codes are made of exactly the same digits (01223, 02123, 02132, 03221, 12023, 12032, …). The farthest-flung twin is 32102 in Astor, FL, 767 miles away.
- 🧭 Farther north than 52% of all ZIP codes, and farther east than 83%.
- 🎯1,159 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 21023 and you would come out at 39.52°S, 103.26°E — 878 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 58m of daylight. Shortest: 9h 22m.
- 📏 At 1.1 square miles of land, 21023 is bigger than 8% of ZIP codes — about 518 football fields.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 66This ZIP66 |
|---|---|
| Households | 30This ZIP30 |
| Housing units | 30This ZIP30 |
| Median age | 42.4This ZIP42.4Maryland39.4US 38.9 |
| Median household income | $84,474This ZIP$84,474Maryland$103,678US $80,734 |
| Median home value | $881,600This ZIP$881,600Maryland$419,900US $332,700 |
| Bachelor's degree or higher | 14.3%This ZIP14.3% |
| Population density | 61.7 / sq miThis ZIP61.7 / sq mi |
Business and tax activity
| Business establishments | 6This ZIP6 |
|---|---|
| Employees | 41This ZIP41 |
| Annual payroll | $1,333,000This ZIP$1,333,000 |
Land area
| Land area | 1.07 sq miThis ZIP1.07 sq mi |
|---|---|
| Water area | 0.01 sq miThis ZIP0.01 sq mi |
ZIP codes near 21023
| ZIP | City | Distance |
|---|---|---|
21030 | Cockeysville, MD | 2.3 mi |
21020 | Boring, MD | 3.4 mi |
21152 | Sparks Glencoe, MD | 3.6 mi |
21071 | Glyndon, MD | 4.6 mi |
21155 | Upperco, MD | 4.9 mi |
21031 | Hunt Valley, MD | 5.0 mi |
21065 | Hunt Valley, MD | 5.2 mi |
21117 | Owings Mills, MD | 6.9 mi |
21153 | Stevenson, MD | 7.6 mi |
21093 | Lutherville Timonium, MD | 7.9 mi |
Find every ZIP code within 10 miles of 21023 →
Questions about this ZIP code
Where is ZIP code 21023?
21023 is in Butler, Maryland, in Baltimore County, part of the Baltimore-Columbia-Towson, MD metropolitan area. Its published point location is 39.5232, -76.7402.
What county is 21023 in?
21023 lies in Baltimore County.
What area code is 21023?
Butler uses area codes 410, 443 and 667, from NANPA's telephone records.
What time zone is 21023 in?
21023 uses America/New_York.
How many people live in 21023?
About 66 people live in ZIP code 21023, in 30 households, at 61.7 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 21023?
$84,474 a year, against $103,678 across Maryland.
What ZIP codes are near 21023?
The closest are 21030 (2.3 mi), 21020 (3.4 mi), 21152 (3.6 mi), 21071 (4.6 mi) and 21155 (4.9 mi).
Is 21023 a PO Box ZIP code?
21023 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “21023 ZIP Code — Butler, Maryland (Baltimore County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/21023
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/21023.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.