Chatham County, Georgia Chatham County, Georgia Chatham County is a county in the U.S. state of Georgia, and is located on the state's Atlantic coast. The county seat and largest city is Savannah. One of the original counties of Georgia, Chatham County was created February 5, 1777, and is named after William Pitt, 1st Earl of Chatham. The U.S. Census Bureau's 2017 population estimate for Chatham County was 290,501 residents, making Chatham the most populous Georgia county outside the Atlanta metropolitan area. The official 2010 Census counted 265,128 residents in Chatham County. Chatham is the core county of the Savannah metropolitan area. According
John Pitt, 2nd Earl of Chatham Chatham soon acquired a reputation for disorganisation and laziness. Contemporaries noted 'the inconvenience attending his laying in bed till the day is advanced, as officers &c were kept waiting'. During the first major campaign of the French Revolutionary Wars Chatham's Admiralty was blamed in part for the failure of the 1793 siege of Dunkirk. Due to miscommunication between the Board of Ordnance and the Admiralty, the ships carrying siege weaponry and supplies for the besieging forces arrived two weeks late. Although in this instance Chatham does not seem to have been guilty of any neglect, his reputation was fatally compromised.