Nick Coppola scored 12 points and had seven assists and the Warhawks (7-9, 4-4 Sun Belt) outshot the Red Wolves 46.3 percent to 41.2 percent. Ongwae also had nine rebounds.
Ongwae put Louisiana-Monroe up 11-10 on a layup and the Warhawks pulled to a five-point lead, but Kirk Van Slyke hit a 3-pointer at 4:56 to put Arkansas State in front 26-25. Melvin Johnson III sank a jumper to tie the score at 33 at halftime.
Louisiana-Monroe pulled ahead in the second half on an 8-2 run and led 59-49 after a 7-0 run, capped by a dunk by Williams. The Red Wolves pulled to within five on a 3-pointer by Ed Townsel, but got no closer.
Johnson led Arkansas State (11-8, 4-4) with 27 and Van Slyke finished with 15.
Reggie Witherspoon, who spent more than 13 seasons coaching at Buffalo, is returning to the city to coach Canisius College.
North Carolina Hall of Fame men's basketball coach Roy Williams is recovering from knee-replacement surgery.
Sparkling facilities are one thing, but Tim Miles needs to regain the momentum of Nebraska's 2014 run to the NCAAs if it is to play with the big boys.