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Where 30021 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 30021 into a pocket calculator and turn it upside down: IZOOE — not quite a word, sorry.
- ➕ As a number, 30,021 = 3 × 10007. Its digits add up to 6, a total 90 other ZIP codes share.
- 💾In binary, the way a computer stores it:
111010101000101 - 🏠 Its numerical neighbours: 30019 (Dacula, GA, 23 mi away) and 30022 (Alpharetta, GA, 15 mi away).
- 🔄 Backwards, 30021 becomes 12003, which is not a ZIP code at all.
- 👥 24 other ZIP codes are made of exactly the same digits (01032, 01203, 01230, 01302, 02130, 02301, …). The farthest-flung twin is 03102 in Manchester, NH, 937 miles away.
- 🧭 Farther south than 80% of all ZIP codes, and farther east than 59%.
- 🎯894 miles southeast of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 30021 and you would come out at 33.81°S, 95.76°E — 1,171 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 14h 24m of daylight. Shortest: 9h 54m.
- 📏 At 3.6 square miles of land, 30021 is bigger than 16% of ZIP codes — room for about 2.7 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 27,781This ZIP27,781 |
|---|---|
| Households | 7,195This ZIP7,195 |
| Housing units | 8,618This ZIP8,618 |
| Median age | 25.4This ZIP25.4Georgia37.6US 38.9 |
| Median household income | $52,278This ZIP$52,278Georgia$77,353US $80,734 |
| Median home value | $275,400This ZIP$275,400Georgia$303,300US $332,700 |
| Median gross rent | $1,346This ZIP$1,346Georgia$1,393US $1,413 |
| Bachelor's degree or higher | 24.5%This ZIP24.5% |
| Mean commute | 36.4 minThis ZIP36.4 min |
| Population density | 7,768.7 / sq miThis ZIP7,768.7 / sq mi |
Business and tax activity
| Business establishments | 239This ZIP239 |
|---|---|
| Employees | 1,886This ZIP1,886 |
| Annual payroll | $74,895,000This ZIP$74,895,000 |
| Tax returns filed | 10,030This ZIP10,030 |
| Total adjusted gross income | $368,093,000This ZIP$368,093,000 |
Land area
| Land area | 3.58 sq miThis ZIP3.58 sq mi |
|---|---|
| Water area | 0.01 sq miThis ZIP0.01 sq mi |
Other place names in 30021
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 30021
| ZIP | City | Distance |
|---|---|---|
30079 | Scottdale, GA | 1.7 mi |
30072 | Pine Lake, GA | 2.3 mi |
30033 | Decatur, GA | 2.6 mi |
30002 | Avondale Estates, GA | 2.7 mi |
30083 | Stone Mountain, GA | 2.8 mi |
30084 | Tucker, GA | 3.4 mi |
30085 | Tucker, GA | 3.4 mi |
30030 | Decatur, GA | 3.9 mi |
30345 | Atlanta, GA | 4.0 mi |
30031 | Decatur, GA | 4.0 mi |
Find every ZIP code within 10 miles of 30021 →
Questions about this ZIP code
Where is ZIP code 30021?
30021 is in Clarkston, Georgia, in DeKalb County, part of the Atlanta-Sandy Springs-Roswell, GA metropolitan area. Its published point location is 33.8080, -84.2390.
What county is 30021 in?
30021 lies in DeKalb County.
What area code is 30021?
Clarkston uses area codes 404, 770, 678, 470 and 943, from NANPA's telephone records.
What time zone is 30021 in?
30021 uses America/New_York.
How many people live in 30021?
About 27,781 people live in ZIP code 30021, in 7,195 households, at 7,768.7 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 30021?
$52,278 a year, against $77,353 across Georgia.
What ZIP codes are near 30021?
The closest are 30079 (1.7 mi), 30072 (2.3 mi), 30033 (2.6 mi), 30002 (2.7 mi) and 30083 (2.8 mi).
Is 30021 a PO Box ZIP code?
30021 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “30021 ZIP Code — Clarkston, Georgia (DeKalb County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/30021
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/30021.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.