Cobb County Population

1840–2026

797.81K

2026 projection

4.1% since 2020 (increase)

0200K400K600K800K1840186018801900192019401960198020002020

Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.

Use the left and right arrow keys to inspect population observations.

Population by year

Population estimates for Cobb County. Annual change is shown as a percentage. Growth is the total change since the preceding observation.
2026797,811+4,4660.56%
2025793,345+4,4660.57%
2024788,879+7,4440.95%
2023781,435+6,9540.90%
2022774,481+7,4450.97%
2021767,036+6510.08%
2020766,385+5,3250.70%
2019761,060+3,9270.52%
2018757,133+3,7720.50%
2017753,361+4,5940.61%

Showing 10 of 33 years.

Cobb County Demographics

37.5median age

Median age

Female38.5 yrs
Male36.6 yrs

Adults

600,241
105,818 seniors (65+) · 18% of adults494,423 other adults

Sex

Female 51.2% · 397,279Male 48.8% · 377,929

Population by age

MaleFemale85+ years, male: 3,53785+ years, female: 6,47280–84 years, male: 4,28580–84 years, female: 6,69075–79 years, male: 8,68175–79 years, female: 10,51870–74 years, male: 13,15070–74 years, female: 16,23765–69 years, male: 16,83165–69 years, female: 19,41760–64 years, male: 22,77060–64 years, female: 24,31855–59 years, male: 22,88655–59 years, female: 25,03450–54 years, male: 26,12350–54 years, female: 27,20045–49 years, male: 25,27745–49 years, female: 27,40440–44 years, male: 25,84640–44 years, female: 26,65835–39 years, male: 28,21735–39 years, female: 29,69330–34 years, male: 28,45530–34 years, female: 29,18325–29 years, male: 27,47925–29 years, female: 27,47920–24 years, male: 25,21520–24 years, female: 24,88415–19 years, male: 26,82515–19 years, female: 26,27810–14 years, male: 25,02810–14 years, female: 24,0185–9 years, male: 25,0305–9 years, female: 24,4320–4 years, male: 22,2940–4 years, female: 21,36485+80–8475–7970–7465–6960–6455–5950–5445–4940–4435–3930–3425–2920–2415–1910–145–90–410K10K20K20K

Hover or tap an age group to see exact counts. Use the up and down arrow keys to inspect age groups.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101

Race and ethnicity

Tap a square or a group below to highlight it.

Each square is about 1% of residents (roughly 7,752 people).

Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.

U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002

Cobb County Income

$102,738median household income

Median household income

$102,738

Half of households earn more, half earn less

Median earnings

$61,579

Typical yearly pay for a worker 25 or older.

Poverty rate

8.7%

About 1 in 11 residents

U.S. Census Bureau, 2024 ACS 5-year estimates · Tables S1901, S1501, S1701

Cobb County Marital Status

49% of residents age 15 and older are married.

MarriedNever married
Overall
Male
Female
Marital status of residents age 15 and older
StatusOverallMaleFemale
Married49%52%47%
Never married35%37%33%
Divorced10%8%13%
Widowed4%2%6%
Separated1%1%1%

U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201

Sources

8 sources, all from the U.S. Census Bureau

Population

American Community Survey, 2024 5-year