Cobb County, Georgia

Cobb County profile, demographic data, and geographic information.

Local Government & Public Administration

Authoritative general-purpose local government units serving this area U.S. Census Bureau GUS (2026) / GMAF

Government Unit	Unit Type	Jurisdiction Role	Contact / Address
COUNTY OF COBB GUS Population: 787,538 (2024) ID: 194936	County	Official County Government	Contact: PLANNING DIVISION MANAGER PO BOX 649, MARIETTA GA 30090-9672
CITY OF MABLETON GUS Population: 78,314 (2024) ID: 251616	Municipal	Municipal Government Within County	Contact: CITY CLERK 1400 VETERANS MEMORIAL HIGHWY SE, STE 134-200, MABLETON GA 30126
CITY OF MARIETTA GUS Population: 63,122 (2024) ID: 161839	Municipal	Municipal Government Within County	Contact: FINANCE PO BOX 609, MARIETTA GA 30061-0609
CITY OF SMYRNA GUS Population: 57,177 (2024) ID: 102178	Municipal	Municipal Government Within County	Contact: CITY ADMINISTRATOR 2800 KING STREET, SMYRNA GA 30080
CITY OF KENNESAW GUS Population: 37,740 (2024) ID: 124447	Municipal	Municipal Government Within County	Contact: CITY CLERK 2529 J O STEPHENSON AVE NW, KENNESAW GA 30144-2780
CITY OF ACWORTH GUS Population: 22,624 (2024) ID: 124446	Municipal	Municipal Government Within County	Contact: ASSISTANT CITY MANAGER 4415 SENATOR RICHARD B RUSSELL AVE, ACWORTH GA 30101-5477
CITY OF POWDER SPRINGS GUS Population: 19,632 (2024) ID: 124448	Municipal	Municipal Government Within County	Contact: CITY CLERK PO BOX 46, POWDER SPRINGS GA 30127-0046
CITY OF AUSTELL GUS Population: 8,244 (2024) ID: 184810	Municipal	Municipal Government Within County	Contact: CITY CLERK 5000 AUSTELL POWDER SPRINGS RD, STE 137, AUSTELL GA 30106-2430