After a strong first half, the Lakers allowed 67 points in the second, getting simply outworked by the Hawks.
Nick Young scored 23 off the bench in the losing effort, hitting 5 of 7 shots from three-point range. His teammates shot 0 for 14 from the same distance (23.8% in total).
Atlanta hit 11-27 from three-point range (40.7%) and 48.9% from the field. The Lakers shot 47.6% from the field, but their issues were primarily on the defensive end in the second half.
The Hawks made up a sizable halftime deficit on the glass to finish with 15 offensive rebounds (44 overall) to the Lakers' 12 (31 overall).
With the loss, the Lakers dip to 11-13. They'll travel to Memphis to play the Grizzlies on Tuesday night.
The Hawks (13-12) host the Sacramento Kings on Tuesday.
The Lakers fell apart in the third quarter, scoring just 19 points while giving up 35 to the Hawks.
A 60-53 Lakers' advantage quickly turned to an eight-point deficit with Atlanta hitting the Lakers with a 17-2 run.
The Hawks rallied from a 10-point deficit to take a 43-41 lead with just under four minutes left in the half.
The Lakers responded, closing the second period on a 13-4 run to take a seven-point lead into the break.