The Georgia gateway has held the lofty status for 19 years now and the only real question is how much longer it can hold off China's Beijing Capital International Airport for the top spot, with unconfirmed reports claiming that it handled 94.3 million passengers in 2016.
The gap is still big, of course, but phenomenal annual growth over the last decade has led to passenger numbers at Beijing Capital almost doubling from 53.5 million in 2007 to close to 100mppa last year.
Hartsfield-Jackson Atlanta (ATL) by comparison handled 89.3 million back in 2007.
Announcing ATL's 2016 traffic figures, Atlanta Mayor, Kasim Reed, also revealed that the airport handled 898,356 aircraft movements last year, more than any other airport in the United States.
“No other airport in the world serves more passengers or handles more aircraft in a more efficient manner than Hartsfield-Jackson,” said Mayor Reed.
“And now with our multi-billion-dollar capital plan currently underway, ATL is positioned to continue leading the aviation industry in the decades ahead.”
New airport general manager, Roosevelt Council, said: “We are proud to be named the world’s busiest airport for the 19th consecutive year.
“This is thanks to the incredible work of our employees and Mayor Reed's leadership. As always, our continued focus will be on the safety and security of everyone at the airport and our efficient operations.”
ATL reached the 104.1 million total by hosting 92,696,320 domestic passengers while serving 11,475,615 international passengers.