Cobb County, Georgia Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates · 3rd-largest in Georgia
The population of Cobb County, Georgia is 769,152 as of the 2023 American Community Survey, making it the 3rd-largest county in Georgia. The median household income is $98,712, the median home value is $373,700, and the median age is 37.4.
The population of Cobb County has grown 14.2% since 2010 (689,542 → 787,538), a +0.95% annualized rate.
769,152
Population
+0.95%
Annual growth
2264
People / sq mi
$98,712
Median Income
$373,700
Median Home Value
Cobb County covers 340 sq mi of land at 2264.3 people per square mile.
About Cobb County, GA
Cobb County stands apart on settlement density — it is among the most densely settled of US counties, at roughly 2,264 people per square mile. With 769,152 residents, Cobb County is a county in Georgia. That makes it one of the ten largest counties in Georgia in the country, at #3 by population.
Households here are among the highest-earning of all US counties: median income is $98,712, above the US median of $78,538. Poverty is relatively low for US counties at 5.5%, below the national 12.4%. Housing is expensive: the median home is worth $373,700, with typical rent around $1,640.
The population is unusually well-credentialed for US counties — 50.4% of adults have a four-year degree, above the national 35.0%. An unusually large 21.1% of workers are remote, above the national 14.0%, and the average commute runs about 30 minutes each way.
That density explains much of the rest of the profile in Cobb County: denser places lean toward renting, shorter commutes by transit, and a younger working-age mix.
Cobb County Population History (2010-2024)
The county of Cobb County had a population of 689,542 in 2010 and 787,538 in 2024, a 14.2% growth over 14 years. The peak was 787,538 in 2024. Average annual growth rate: 0.95%.
787,538
Population (2024)
689,542
Population (2010)
787,538
Peak (2024)
0.95%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 689,542 |
| 2011 | 696,629 |
| 2012 | 706,517 |
| 2013 | 716,265 |
| 2014 | 727,847 |
| 2015 | 739,428 |
| 2016 | 748,767 |
| 2017 | 753,361 |
| 2018 | 757,133 |
| 2019 | 761,060 |
| 2020 | 766,383 |
| 2021 | 766,747 |
| 2022 | 774,162 |
| 2023 | 781,208 |
| 2024 | 787,538 |
Race & Ethnicity
| White | 50.5% |
| Black or African American | 27.0% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 1.6% |
| Two or More Races | 0.0% |
Age & Sex
37.4
Median Age
51.3%
Female
48.7%
Male
13.3%
Age 65+
Age Distribution
Children (under 15): 18.6% · Seniors (65+): 13.3%
Income & Poverty
| Median household income | $98,712+$24,048 vs state |
| Mean household income | $131,991 |
| Per-capita income | $50,975 |
| Poverty rate | 5.5%-4.4% vs state |
| Unemployment rate | 3.2% |
| Employment-to-population | 67.2% |
Top Industries by Employment
The largest employment sector in Cobb County is professional & business services, accounting for 18.7% of workers.
How residents commute
0.6%
Drive alone
1.2%
Carpool
67.4%
Public transit
21.1%
Work from home
29.5 min
Avg commute
Housing
$373,700+$100,800 vs state
Median home value
$1,640
Median rent
67.0%
Homeownership rate
311,556
Total housing units
94.2%
Occupied
5.8%
Vacant
33.0%
Renter-occupied
Social & access
87.8%
With health insurance
98.4%
With broadband internet
42.3%
Foreign-born
6.5%
Veterans (18+)
9.2%
With a disability
78.4%
Speak language other than English at home
Education
92.8%
High School+
50.4%
Bachelor's+
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County rankings
Common questions about Cobb County, GA
Frequently Asked Questions
Cobb County, Georgia has a population of 769,152 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 3rd-largest county in Georgia. Population density is 2264 people per square mile.
The population of Cobb County has grown 14.2% since 2010 (689,542 → 787,538), a +0.95% annualized rate.
The median household income in Cobb County, Georgia is $98,712, with mean (average) household income of $131,991 and per-capita income of $50,975. 5.5% of residents live below the federal poverty level.
In Cobb County, the largest racial and ethnic groups are White (50.5%), Black or African American (27.0%), Hispanic or Latino (1.6%). Figures are from the US Census Bureau's 2023 ACS 5-year estimates and reflect self-reported responses.
The median age in Cobb County, Georgia is 37.4 years. Residents are 51.3% female and 48.7% male.
The median home value in Cobb County is $373,700 and median monthly rent is $1,640. 67.0% of occupied housing units are owner-occupied. The county has 311,556 total housing units, 5.8% of which are vacant.
The largest employment sector in Cobb County, Georgia is professional, scientific, and management services, employing 18.7% of workers. The unemployment rate is 3.2%.
Atlanta is among the largest cities associated with Cobb County, Georgia, with a population of 499,287.
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.