
Marietta
- County:
- Cobb County
- County Seat:
- Yes
- Area (mi²):
- 23.507
- State:
- Georgia
Marietta is a city located in Cobb County, Georgia. Marietta has a 2025 population of 63,914. It is also the county seat of Cobb County. Marietta is currently growing at a rate of 0.9% annually and its population has increased by 4.69% since the most recent census, which recorded a population of 61,051 in 2020.
The average household income in Marietta is $105,083 with a poverty rate of 12.67%. The median age in Marietta is 35.2 years: 34 years for males, and 36.9 years for females.