What city is 30021 in?

30021 is a Clarkston, GA mailing address. By land area, 50% lies inside Clarkston and 11% lies inside Scottdale; the rest is outside any Census-defined city or community.

What is the population of 30021?

About 27,781 people (±3,154), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 25,442.

What is the median household income in 30021?

$52,278 (±$4,495), compared with $77,353 for Georgia as a whole. Half the households in the ZIP code earn more and half earn less.

How many carrier routes and mailboxes are in 30021?

8 USPS carrier routes with 8,413 residential and 324 business mailboxes (8,738 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.

What ZIP codes are near 30021?

The closest, measured center to center: 30079 (1.7 mi, Scottdale), 30072 (2.3 mi, Pine Lake), 30033 (2.6 mi, North Decatur), 30002 (2.7 mi, Avondale Estates), 30083 (2.8 mi, Tucker) and 30084 (3.4 mi, Tucker).

30021 ZIP Code, Clarkston, GA

30021 is a ZIP code in Clarkston, Georgia in DeKalb County. It covers 3.6 square miles of land. The closest ZIP codes are 30079, 30072 and 30033. 27,781 people live here in 7,195 households. At about 7,769 people per square mile it is built up to city-neighborhood density, and most households rent (25% own). Median household income is $52,278, below the Georgia median of $77,353; 46% of households have children under 18.

Quick facts

Mailing city: Clarkston, GA
County: DeKalb County
Land area: 3.6 sq mi
Population: 27,781
Median household income: $52,278
Carrier routes: 8 (8,413 homes)

Key figures

Measure	Value
Residents	27,781
Households	7,195
Median household income	$52,278
Income per person	$20,777
Median age	25.4
Homeowners	25.1%
Median home value	$275,400
Median rent	$1,346
Bachelor's degree or higher	24.5%
Average commute (minutes)	36.4
Households with kids under 18	45.8%
Moved in the past year	17.8%
Below the poverty line	29.3%
Broadband internet	92.6%
Speak a non-English language at home	56.7%

Household income

% of households	Value
<$10K	6.1%
$10–15K	5.4%
$15–25K	9.1%
$25–35K	10.7%
$35–50K	16.8%
$50–75K	19.3%
$75–100K	12.5%
$100–150K	11.1%
$150–200K	4.4%
$200K+	4.6%

Age

% of all residents	Value
<10	24.4%
10–19	18.5%
20–24	6.0%
25–34	18.5%
35–44	11.9%
45–54	8.3%
55–64	8.2%
65–74	3.5%
75+	0.8%

Tenure

% of housing units	Value
Owned, with mortgage	13.3%
Owned outright	7.9%
Rented	62.4%
Vacant	16.5%

Type of building

% of housing units	Value
Detached house	24.2%
Townhome	6.1%
2–4 units	18.5%
5–19 units	41.2%
20+ units	9.6%
Mobile / other	0.3%

Businesses in 30021

239 business establishments with 1,886 employees (ZIP Codes Business Patterns 2023).

Retail Trade: 59
Health Care and Social Assistance: 31
Other Services (except Public Administration): 28
Real Estate and Rental and Leasing: 18
Professional, Scientific, and Technical Services: 16
Accommodation and Food Services: 16
Construction: 15
Administrative and Support and Waste Management and Remediation Services: 13

EDDM carrier routes

30021 has 8 USPS carrier routes with 8,413 residential and 324 business mailboxes. Open the EDDM route map.

Carrier routes in 30021

30021 has 8 USPS carrier routes (8 city (C)) with 8,413 residential and 324 business mailboxes. Routes range from 690 homes (C002) to 1,370 homes (C005); the median route has 1,112 homes. The Census counted 7,195 households in 30021 (2020–2024 average); USPS counts current mailboxes, including new and vacant homes.

Homes per route	Routes
1–249	0
250–499	0
500–749	1
750–999	2
1,000–1,499	5
1,500+	0

Best routes in 30021 for…

Most businesses

For B2B offers: office supplies, cleaning, IT, catering and commercial services.

Route C009 — USPS business mailboxes 67, 831 homes
Route C007 — USPS business mailboxes 60, 1,185 homes
Route C003 — USPS business mailboxes 52, 1,172 homes
Route C005 — USPS business mailboxes 48, 1,370 homes
Route C008 — USPS business mailboxes 37, 1,051 homes

Select these 5 routes on the route map

Every carrier route in 30021

Route	Type	Homes	Businesses	Est. median income	Est. owners	Est. families with kids	Est. moved in past year
C001	City	788	12	$83,959	—	—	—
C002	City	690	21	$95,986	—	—	—
C003	City	1,172	52	$58,494	—	—	—
C004	City	1,326	27	$46,978	—	—	—
C005	City	1,370	48	$46,978	—	—	—
C007	City	1,185	60	$41,422	—	—	—
C008	City	1,051	37	$36,999	—	—	—
C009	City	831	67	$32,284	—	—	—

Income, owners, families and movers are estimates for each route (how we estimate them); mailbox counts are current USPS figures. Open 30021 on the EDDM route map.

How route demographics are estimated

Mailbox counts come from USPS; demographics are estimates

The number of homes and businesses on each carrier route is the current USPS EDDM count. The Census Bureau does not publish figures for carrier routes, so income, homeownership, ages, families, movers and housing age on a route are EDDM2GO estimates built from Census block groups (neighborhood areas of roughly 600 to 3,000 people).

How a route gets its figures: the block-group length-share method

We trace each route's streets every 25 meters and record which block group each stretch falls in. The route's homes are spread along its streets in proportion to length, so a route with 60% of its street length in one block group is assumed to have 60% of its homes there. Each block group then contributes its Census counts in proportion to the share of its housing units that sit on the route (capped at the whole block group). Medians are recalculated from the combined income, home-value and age brackets, the way the Census Bureau computes them, not averaged.

Margins of error

Census survey figures carry a margin of error at 90% confidence; we carry it through the calculation and show it as ±. Our margins treat the route-to-block-group split as exact, so the real uncertainty is larger. Routes with fewer than 100 estimated households, large margins, or streets we could not place are flagged.

Different years

USPS mailbox counts are current. Census figures are 5-year averages for 2020–2024, so a new subdivision may have more homes on the route today than the Census counted. Use the route figures to compare routes with each other, not as an exact head count.

Why some routes show identical figures

Two routes that run through the same block group get the same percentages and medians, because the Census publishes one set of figures for the whole block group. Their mailbox counts still differ, and those are exact.

Route and mailbox counts: USPS EDDM route data. Route demographics: EDDM2GO estimates from U.S. Census Bureau American Community Survey 5-year block-group data (2020–2024) and 2024 cartographic block-group boundaries. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Nearby ZIP codes

30079 — Scottdale CDP, GA (1.7 mi)
30072 — Pine Lake city, GA (2.3 mi)
30033 — North Decatur CDP, GA (2.6 mi)
30002 — Avondale Estates city, GA (2.7 mi)
30083 — Tucker city, GA (2.8 mi)
30084 — Tucker city, GA (3.4 mi)
30030 — Decatur city, GA (3.9 mi)
30345 — Chamblee city, GA (4 mi)

Areas that include 30021

Where it ranks

Mail every home in 30021

Route counts on this page price as Full Service 6.5 × 9 postcards: we print, bundle by carrier route and hand the mailing to USPS. Prefer to take it to the Post Office yourself? Print only costs less and you pay postage at drop-off.

EDDM guides

ZIP code statistics describe the Census ZIP Code Tabulation Area (ZCTA) 30021, which approximates the USPS ZIP code area. Census figures: American Community Survey 5-year estimates, 2020–2024.

Frequently asked questions

What city is 30021 in?: 30021 is a Clarkston, GA mailing address. By land area, 50% lies inside Clarkston and 11% lies inside Scottdale; the rest is outside any Census-defined city or community.
What county is 30021 in?: 30021 is in DeKalb County.
What is the population of 30021?: About 27,781 people (±3,154), according to the Census Bureau's American Community Survey 5-year estimates for 2020–2024. The 2020 Census counted 25,442.
What is the median household income in 30021?: $52,278 (±$4,495), compared with $77,353 for Georgia as a whole. Half the households in the ZIP code earn more and half earn less.
How many carrier routes and mailboxes are in 30021?: 8 USPS carrier routes with 8,413 residential and 324 business mailboxes (8,738 in all), from the route data stored by EDDM2GO. An EDDM mailing can target any combination of these routes.
What ZIP codes are near 30021?: The closest, measured center to center: 30079 (1.7 mi, Scottdale), 30072 (2.3 mi, Pine Lake), 30033 (2.6 mi, North Decatur), 30002 (2.7 mi, Avondale Estates), 30083 (2.8 mi, Tucker) and 30084 (3.4 mi, Tucker).

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.