Cobb County’s population is rising with the rest of metro Atlanta as the region continues to attract new residents, according to a study from the Atlanta Regional Commission.

Cobb welcomed 12,800 people between April 2016 and the same month in 2017, bringing its total population to about 758,000, the study said.

The entire metro area added 75,800 people and is now home to about 4.5 million.

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(Photo Illustration: Philip Robibero / AJC | Source: Getty)

Credit: Philip Robibero / AJC

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Inventor Lonnie Johnson stands with his Super Soaker water guns at JTEC Energy on Wednesday, Oct. 29, 2025, in Atlanta. Johnson, a former NASA engineer, is currently working on a new energy technology through his company’s JTEC device that turns thermal heat into usable energy. (Natrice Miller/AJC)