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30021
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  2. ZIP Codes
  3. ZIP Code 30021
Georgia (GA)DeKalb CountyAtlanta-Sandy Springs-Roswell404470678943

ZIP Code 30021 — Clarkston, GA

DeKalb County * Atlanta-Sandy Springs-Roswell metro

Compare

27.8K

Population

$52.3K

Median income

per household

$275.4K

Home value

29.4%

Poverty rate

What stands out

  • Median household income: $52.3K (bottom quartile vs US ZIP codes).
  • Median home value: $275.4K.
  • Poverty rate: 29.4% (high poverty; top 10% vs US ZIP codes).

Categories vs U.S.

Economy

0 of 5 metrics better than U.S. benchmarks

Rental strain: 61.2% of renter households are rent-burdened (≥30% of income).

Median household income

$52.3K

U.S.

$81K

Per-capita income

$20.8K

U.S.

$45K

Median home value

$275.4K

U.S.

$333K

Housing stress

Rent-burdened renters (≥30%)

61.2%

U.S.

51.1%

Severely rent-burdened (≥50%)

31.1%

U.S.

25.9%

Affordability Ratios

Rent-to-Income

30.9%

Above 30% threshold (cost-burdened)

Home-Value-to-Income

5.3×

Above typical 3-5x ratio

Income distribution

Share of households by income bracket (ACS).

< $50k
48.1%
$50–100k
31.8%
$100–200k
15.5%
$200k+
4.6%

Health

0 of 6 available metrics better than U.S.

CDC PLACES modeled ZCTA-level estimates (adult prevalence).

Obesity

34.9%

U.S.

33.3%

Diabetes

14.5%

U.S.

12.0%

Current smoking

19.6%

U.S.

13.1%

Connectivity

3 of 3 metrics better than U.S.

Best available speed

1,000Mbps

Gigabit speeds reported

100+ Mbps coverage

98.8%

U.S.

85.3%

Gigabit ready

77.5%

U.S.

8.6%

5G available

99.8%

U.S.

77.4%

Learning

Education metrics come from ACS 5-year estimates for ZIP Code Tabulation Areas (ZCTAs).

Bachelor's degree+ (age 25+)

24.5%

U.S.

35.7%

ZIP-level estimates can have higher margins of error than county/state totals; treat small differences as noise.

School districts

DeKalb County School District

Map

ZIP 30021

Clarkston, GA

Population

27.8K

Area

3.6 sq mi

Density

7.8K/sq mi

Neighbors

300023003230033300793008330084
More Details

Census Tracts

11 tracts overlap this ZIP. Hover over segments to explore.

13%
13%
11%
10%
10%
+6

Tract 220.10

13.4%

Tract 220.07

13.1%

Tract 220.13

10.6%

Tract 220.11

10.4%

Tract 220.01

10.3%

Others (6)

42.2%

Total tracts: 11Coverage: 100.0%

Representation

U.S. House

ZIP codes can span multiple congressional districts. Overlap percentages are approximate by land area. Verify by address.

86%
14%

GA-4

86%

GA-5

14%

Districts: 2Coverage: 100.0%

Data freshness

ACS 5-Year
2020–2024
CDC PLACES
2025
Broadband
2020-12
Mobile
2025-11-24
Page Updated
2026-02-23

Release schedule and upstream dates: Sources.

Data sources

US Census Bureau (ACS 5-year)HUD USPS ZIP crosswalkUS Census TIGER/Line (geometry inputs)US Census TIGER/Line (school districts)US Census Bureau (ZCTA-to-tract relationship, 2020)US Census Bureau (2020 ZCTA-to-congressional-district relationship file, CD119)CDC PLACES (ZCTA)FCC (Form 477 broadband)FCC (Mobile Broadband Data Collection)

Derived statistics

  • ZIP pages use Census ZIP Code Tabulation Areas (ZCTAs), not USPS delivery routes.
  • Population density is computed as population ÷ land area.
  • Overlap percentages (tracts and districts) are derived from map geometry and are approximate.

Data accuracy & methodology

ZIP pages combine 2020–2024 ACS 5-year ZCTA estimates with other public datasets when available (see Sources). Connectivity metrics use FCC coverage data, not ACS. ZIP-level estimates can have higher margins of error than county/state totals; treat small differences as statistical noise rather than precise changes.