Cobb County, Georgia Demographics 2026

Name: Cobb County, Georgia Demographics
Creator: U.S. Census Bureau
License: https://www.census.gov/data/developers/about/terms-of-service.html

Cobb County, Georgia has a population of 775,208, the 3rd most populous county in Georgia. The median household income is $102,738 and the median home value is $407,200. The poverty rate is 8.7%.

Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes

Cobb County Quick Facts

Population 775,208

Median Household Income $102,738

Median Home Value $407,200

Poverty Rate 8.7%

Unemployment Rate 4.5%

Median Age 37.5 years

Homeownership Rate 67.0%

Affordability Ratio 4.0x

Bachelor's Degree+ 50.8%

High School Graduation 93.0%

Cities/Places 10

Population 775,208 3rd of 159

Median Income $102,738 33% higher than state

Poverty Rate 8.7%

Unemployment 4.5%

How Cobb County Changed

Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.

Metric	2019–2023	2020–2024	Change
Population	769,152	775,208	+0.8%
Median household income	$98,712	$102,738	+4.1%
Median home value	$373,700	$407,200	+9.0%

Median Household Income

Cobb

$102,738

$77,353

National

$80,734

Median Home Value

Cobb

$407,200

$303,300

National

$332,700

Economy & Housing

Household Income Distribution

Under $25K 9.2%

$25K-$50K 12.5%

$50K-$100K 26.9%

$100K+ 51.4%

Detailed income brackets

Under $10K

3.5%

$10K-$15K

1.9%

$15K-$20K

1.7%

$20K-$25K

2.1%

$25K-$30K

2.3%

$30K-$35K

2.3%

$35K-$40K

2.6%

$40K-$45K

2.5%

$45K-$50K

2.8%

$50K-$60K

5.8%

$60K-$75K

8.8%

$75K-$100K

12.4%

$100K-$125K

10.9%

$125K-$150K

8.6%

$150K-$200K

12.2%

$200K+

19.7%

Employment

4.5% Unemployment Rate State: 5.1%|National: 5.2%

70.5% Labor Force Participation

Housing Overview

Owner 67.0%

Renter 33.0%

Affordability Index Moderate

4.0x home value to income ratio

Median gross rent $1,730/mo 20.2% of median household income annually

People & Demographics

Age Distribution

Under 18

22.6%

18-34

23.6%

35-54

27.9%

55-74

20.7%

75+

5.2%

Race & Ethnicity

Diversity Index

High Diversity

A diverse community with significant representation from multiple racial and ethnic groups.

State average: 65 | National average: 61

Education

Educational Attainment (Adults 25+)

Cities & Places in Cobb County

City	Population	Median Income	Poverty	Home Value
Mableton	77,678	$77,980	13.5%	$313,100
Marietta	62,263	$72,725	12.8%	$448,500
Smyrna	56,633	$100,061	10.6%	$449,500
Kennesaw	34,605	$83,356	10.3%	$335,400
Acworth	22,473	$83,539	7.7%	$339,900
Powder Springs	18,009	$105,070	14.6%	$332,900
Vinings	14,390	$94,982	6.2%	$604,600
Fair Oaks	9,014	$62,996	23.6%	$199,600
Austell	8,447	$72,938	10.8%	$284,900
Kennesaw State University	2,284	N/A	N/A	N/A

Explore Georgia Rankings

Cities by Population All cities ranked by size Richest Cities Ranked by median income Most Educated By bachelor's degree rate Most Affordable By housing affordability

Population Overview

Cobb County is located in Georgia with a total population of 775,208. It is the 3rd most populous county out of 159 in Georgia. The county encompasses 10 Census-designated places.

Age Demographics

The median age in Cobb County is 37.5 years. This is about the same as the state median of 37.6 years.

Economy, Income & Housing

The median household income in Cobb County is $102,738. This is 33% higher than the state median of $77,353. It is also 27% higher than the national median of $80,734. The poverty rate stands at 8.7%. This is 35% lower than the state poverty rate of 13.4%. The unemployment rate is 4.5%. This is 12% lower than the state rate of 5.1%. The median home value is $407,200. Housing costs are 34% higher than the state median of $303,300. The home-value-to-income ratio is 4.0x. 67.0% of occupied housing units are owner-occupied. This homeownership rate is 2% higher than the state average of 65.7%.

Race & Ethnicity

The largest racial or ethnic group in Cobb County is White (non-Hispanic), making up 47.1% of the population. Black or African American residents account for 26.4%.

Education

50.8% of residents aged 25 and older hold a bachelor's degree or higher. This places Cobb County in the top 10% of all counties in the state for educational attainment. This is 45% higher than the state rate of 34.9%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 93.0%. Notably, 19.0% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All figures for Cobb County come from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates, with comparisons drawn against Georgia and national averages from the same dataset. See our methodology page for how each metric is defined, or data.census.gov for official tables with margins of error.

Frequently Asked Questions

What is the population of Cobb County, Georgia?

Cobb County has a population of 775,208, making it the 3rd most populous county in Georgia.

What is the median income in Cobb County?

The median household income in Cobb County is $102,738 with a poverty rate of 8.7%.

How many cities are in Cobb County, Georgia?

Cobb County contains 10 Census-designated places.