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+
Largest cities in Georgia
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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.
Cobb County, GA Climate
Cobb County, GA has an average annual temperature of 16°C (61°F) and receives about 1323 mm of precipitation per year. The warmest month is July and the coldest is January. Figures are 1970–2000 climate normals.
16°C
Avg Temp
1323
Precip (mm/yr)
Jul
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | 5° / 41° | 127 mm |
| February | 7° / 45° | 123 mm |
| March | 12° / 53° | 146 mm |
| April | 16° / 61° | 119 mm |
| May | 20° / 69° | 109 mm |
| June | 24° / 75° | 98 mm |
| July | 26° / 79° | 127 mm |
| August | 25° / 78° | 94 mm |
| September | 22° / 72° | 91 mm |
| October | 16° / 61° | 82 mm |
| November | 11° / 52° | 88 mm |
| December | 7° / 44° | 119 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Cobb County, GA
The most comfortable months to visit Cobb County, GA are typically September, May and June, when temperatures are mildest and rainfall is relatively low. The hottest month is July (around 32°C high). The coldest is January (near 0°C low). March is usually the wettest month.
Where to stay near Cobb County
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.