- Secured Lincoln's election: the Union victory in Atlanta helped boost Abraham Lincoln's presidential campaign and contributed to his re-election in November 1864.
- Boosted morale: the capture of Atlanta was a significant morale booster for the Union army and the Northern public, who were eager for victories after years of a bloody war.
- Weakened Confederate support: the loss of Atlanta, a major manufacturing and transportation hub, was a significant blow to the Confederacy. It further eroded support for the Confederate cause, especially in Georgia and the Deep South.
- Turned the tide of the war: the Union victory in Atlanta shifted the momentum of the war in the Union's favor. It set the stage for Sherman's March to the Sea, which further weakened the Confederacy and ultimately led to its surrender.