Karen Handel's campaign Thursday morning conceded defeat in the 6th District race.
"After carefully reviewing all of the election results data, it is clear that I came up a bit short on Tuesday," a statement said.
The district covers parts of Cobb, Dekalb and Fulton counties.
"Congratulations to Representative-Elect Lucy McBath," the statement continued, sending "only good thoughts and much prayer for the journey that lies ahead for her."
Democrat Lucy McBath, a first-time candidate, had declared victory over the incumbent Wednesday night, but results have yet to be certified.
HEAR MORE FROM POLITICAL REWIND: Breaking Down Election Results