Its Cumberland District, an edge city, has over 24 million square feet (2,200,000 m2) of office space.

Major League Baseball's Atlanta Braves have played home games at Truist Park in Cumberland since 2017.

It is believed that the county seat of Marietta was named for Judge Cobb's wife, Mary.

[11] During the American Civil War, some Confederate troops were trained at a camp in Big Shanty (now Kennesaw), where the Andrews Raid occurred, starting the Great Locomotive Chase.

[13] The Battle of Kennesaw Mountain on June 27, 1864, was the site of the only major Confederate victory in General William T. Sherman's invasion of Georgia.

[citation needed] In 1915, Leo Frank, the Jewish supervisor of an Atlanta pencil factory who was convicted of murdering one of his workers, thirteen-year-old Mary Phagan, was kidnapped from his jail cell and brought to Frey's Gin, two miles (3.2 km) east of Marietta, where he was lynched.

Low prices during the Great Depression resulted in the cessation of cotton farming throughout Cobb County.

[11][15][clarification needed] To help combat the bust, the state started work on a road in 1922 that would later become U.S. 41, later replaced by Cobb Parkway in the late 1940s and early 1950s.

During the Korean and Vietnam Wars, Lockheed Marietta was the leading manufacturer of military transport planes, including the C-130 Hercules and the C-5 Galaxy.

"In Cobb County and other sprawling Cold War suburbs from Orange County to Norfolk/Hampton Roads, the direct link between federal defense spending and local economic prosperity structured a bipartisan political culture of hawkish conservatism and material self-interest on issues of national security.

In the 1960s and 1970s, Cobb transformed from rural to suburban, as integration spurred white flight from the city of Atlanta, which by 1970 was majority-African-American.

Real-estate booms drew rural white southerners and Rust Belt transplants, both groups mostly first-generation white-collar workers.

In 1975, Cobb voters elected John Birch Society leader Larry McDonald to Congress, running in opposition to desegregation busing.

A conservative Democrat, McDonald called for investigations into alleged plots by the Rockefellers and the Soviet Union to impose "socialist-one-world-government" and co-founded the Western Goals Foundation.

In 1983, McDonald died aboard Korean Air Lines Flight 007, shot down by a Soviet fighter jet over restricted airspace.

In 1990, Republican Congressmen Newt Gingrich became Representative of a new district centered around Cobb County.

In 1993, county commissioners passed a resolution condemning homosexuality and cutting off funding for the arts after complaints about a community theater.

As Atlanta's gentrification reversed decades of white flight, middle-class African-Americans and Russian, Bosnian, Chinese, Indian, Brazilian, Mexican, and Central American immigrants moved to older suburbs in south and southwest Cobb.

In 2010, African-American Democrat David Scott was elected to Georgia's 13th congressional district, which included many of those suburbs.

Despite the lack of a grid system of city blocks though the county, all street addresses have their numeric origin at the southwest corner of the town square in Marietta.

It is a zone spanning 7,162 square miles (18,549 km2),[19] with four active telephone area codes, and local calling extending into portions of two others.

The secondary station is the much newer WWH23 on 162.425 from Buchanan, which also transmits warnings for Cobb but has reception mainly in the western part of the county.

[34] Regarding specific ethnic origins, 10.4% cited German, 10.0% English, 9.3% Irish, and 8.6% American ancestry.

[50] The libraries provide resources such as books, videos, internet access, printing, and computer classes.

Smyrna operates a separate PSAP while offering dispatch services to the city of Powder Springs.

Before 1960, it was a "Solid South" Democratic county, except when Warren G. Harding came close to carrying it in 1920, and when Herbert Hoover won it by nine points due to anti-Catholic voting against Al Smith in 1928.

[54] However, due to rapid racial and ethnic demographic changes since the 1990s, along with population growth coming from blue northern states, the county has increasingly supported the Democratic Party.

The SPLOST barely passed by a 114 vote margin, or less than one-quarter of a percent, in a September 2005 referendum.

The revenue was to go to a new county courthouse, expanded jail, various transportation projects, and the purchasing of property for parks and green space.

[71] Until 1971, the Louisville & Nashville Railroad, running on tracks now owned by CSX, operated passenger trains through Marietta depot.