Residential delivery area · Georgia
ZIP Code 30126: Mableton, GA
ZIP code 30126 is in Mableton, Georgia, entirely in Cobb County (Census 2020 ZIP-county file). About 42,000 people live there (Census Bureau, ACS 2020-2024). Median household income is $101,891 (Census Bureau, ACS 2020-2024). By Census place, its land lies in Mableton (78%) and Smyrna (10%); 12% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2025
- ZBP2023
- IRS2022
- Town
- Mableton · its only residential ZIP
- County
- Cobb County
- Census places
- Mableton (78%) census-designated place; Smyrna (10%)
- Metro area
- Atlanta-Sandy Springs-Roswell, GA
- House district
- GA-6 119th Congress
- State
- Georgia
- Time zone
- Eastern
- Land area
- 20.5 sq mi · 2,041 people per sq mi
Where is ZIP code 30126?
30126 centers on 33.815°, -84.554° and covers 20.5 square miles of land plus 0.1 of water. It borders 7 ZIP codes: 30082, 30168, 30106, 30336, 30318, 30339, 30331.
The map draws ZIP code areas only. For the streets inside 30126, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 30126 compare with the rest of Cobb County?
| Measure | 30126 | In Cobb County | In GA |
|---|---|---|---|
| People (ACS 2020-2024) | 41,829 | 12th of 21 | 78th of 751 |
| Median household income | $102k | 11th of 19 | 72nd of 476 |
| Median home value | $377k | 12th of 19 | 83rd of 474 |
Its median household income is higher than in 82% of U.S. residential ZIP codes, and it is denser than 85% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 30126?
The 2020 Census counted 40,305 people in 30126; the ACS, which samples households over 2020-2024, estimates 41,829. Between the 2010 and 2020 censuses its population grew 8.7% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 41,829
- 2020 Census count
- 40,305+8.7% since 2010 (37,088)
- Households
- 15,853
- Median age
- 39.6
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 30126?
Of the 41,829 people the ACS estimates in 30126, 21.4% are under 18 and 11.9% are 65 or older. The largest group by race and Hispanic origin is Black (not Hispanic) (42.1%), then White (not Hispanic) (28.4%).
- Under 1821.4%
- 18 to 6466.7%
- 65 and older11.9%
- Black, not Hispanic42.1%
- White, not Hispanic28.4%
- Hispanic or Latino22.1%
- Asian, not Hispanic4.0%
- Other or two or more3.5%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 30126 earn?
Median household income is $101,891 (ACS 2020-2024), the 11th highest of the 19 ranked ZIP codes in Cobb County. It is not measurably different from 2015-2019 ($102,986 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $101,891
- Income per person
- $52,448
- Below the poverty line
- 9.4%
- Unemployed (of the labor force)
- 4.7%
- Adults 25+ with a bachelor's degree
- 46.2%
- Adjusted gross income per tax return, 2022
- $91,12020,220 returns; wages 80% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 30126?
FHFA's house price index for 30126, built from repeat sales and appraisals of the same homes, rose 139% from 2015 to 2025 and rose 62% from 2020 to 2025, and moved −0.1% in 2025.
- Median home value (owners' estimate)
- $377,000
- Median gross rent
- $1,569
- Homes owned by their occupants
- 78.1%
- Housing units
- 17,005
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 30126?
781 business establishments had a location in this ZIP code in 2023, 123 more than in 2018; the most are in professional, scientific, and technical services (ZIP Code Business Patterns).
- Professional, scientific, and technical services107
- Retail trade100
- Other services (except public administration)76
- Health care and social assistance75
- Accommodation and food services68
- Construction64
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 30126?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 30082 | Smyrna | 27,296 | $120k | 2.9 mi |
| 30168 | Austell | 26,612 | $64k | 2.9 mi |
| 30106 | Austell | 23,107 | $69k | 4.4 mi |
| 30336 | Atlanta | 514 | $54k | 5.6 mi |
| 30318 | Atlanta | 59,609 | $83k | 6.3 mi |
| 30339 | Atlanta | 35,372 | $103k | 6.3 mi |
| 30331 | Atlanta | 62,567 | $63k | 7.6 mi |
| 30080 | Smyrna | 53,316 | $92k | 5.3 mi (near) |
| 30111 | Clarkdale | 0 | – | 5.9 mi (near) |
| 30122 | Lithia Springs | 27,036 | $69k | 6.0 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.