Jermaine O'Neal had 11 points and 11 rebounds for Indiana. Jeff Foster had eight points, 18 rebounds and four steals; Harrington also had six rebounds, and Jackson added three rebounds and six assists for the Pacers, who broke a three-game losing streak.
Indiana had a 52-42 halftime advantage.
Dwight Howard had 20 points, eight rebounds and three assists for Orlando. Grant Hill had 16 points and three rebounds; Jameer Nelson had 12 points and four rebounds; and Carlos Arroyo added 11 points and three assists for the Magic, who have split their last four games.
Indiana out-rebounded the Magic, 48-34.