Atlanta played their home matches at Mercedes-Benz Stadium and were coached by Gerardo "Tata" Martino.

[1] With a win over Chicago Fire on October 21, Atlanta qualified for the 2019 CONCACAF Champions League by having the best aggregate record across the 2017 and 2018 MLS seasons.

[2] The club later qualified for the competition by winning MLS Cup 2018, so their previously-held spot was allocated to the team with the second best aggregate record, New York Red Bulls.

Due to a surplus of players under contract that required an International Roster Slot, Oliver Shannon was loaned to Atlanta United 2 for the full 2018 season.

In addition, as part of Eric Remedi's incoming transfer, José Hernández was officially loaned to Atlanta United 2.