Auburn hit 13-24 treys and shot 57.1 percent from the field for the game as six Tigers scored in double figures led by 18 points from senior center Brendon Knox. He hit 7-9 field goals and pulled down 11 rebounds.
It was the first double-double as a Tiger for Knox. The 6-10 post player joined the team last season as a transfer from junior college.
DeWayne Reed scored 16 points for the Tigers while fellow guard Frankie Sullivan chipped in with 15 points. Lucas Hargrove finished with 14 points, Tay Waller scored 13 and freshman Andre Malone added 11 as he hit 3-3 treys.
"I thought we finally shot the ball pretty well from the perimeter," Auburn coach Jeff Lebo said. "That certainly opened up some things for us. We were very balanced offensively.
"Lucas established himself inside and so did Brendon Knox," Lebo added. "We have been waiting on that kind of consistency from the perimeter. We turned it over a little too much at the end with our subs in, but overall I thought it was a good win for us."
Auburn improved its record to 8-6 going into a Tuesday night home game vs. West Georgia.
Georgia Southern, which shot 41.7 percent from the field, is now 3-12. The Eagles were led by guard Antonio Hanson, who scored 16 points.
Auburn, which led 39-33 at halftime, scored 56 points after intermission thanks to 60 percent shooting. That included five makes in nine tries from three-point range.
The Tigers out-rebounded the visitors 39-31. Auburn committed 19 turnovers, two more than the Eagles.
"We had nice balance out there," Lebo said. "We wanted to do a better job on Antonio Hansen. We have continued to have problems taking the shooter out of the game."
The Tigers have just one more game before starting conference play. Commenting on how well his team is to play in the SEC, Lebo said, "Shooting the ball well was a good sign today. We are small. Rebounding at times will be an issue for us. Our best offensive group is our three smaller guys. We have to give up something there. That is a concern with SEC play right around the corner."
Auburn jumped out to a 6-0 lead to open the game, but played even with Georgia Southern the rest of the first half.
"In the first half we just started off slowly," Knox said. "That is something we have got to work on because when we get into SEC play we won't be able to start off slow. We have got to work on getting ready to start the game off hot and with high energy."