The Pacers reached 100 points for the first time this season, improving to 9-0. Chicago, the only other team in the Central Division with a winning record at 4-3, will host the Pacers on Saturday.
Indiana is the first team in the league to begin a season since Dallas opened the 2002-03 campaign with 14 straight victories.
Hibbert made 8-of-10 shots from the field and all eight of his free throw attempts while scoring 24 points. He also had 10 rebounds and blocked eight shots.
Indiana led by 10 after one quarter and its lead was never threatened as the Pacers shot 50 percent from the field and went 19-of-21 from the line. Paul George chipped in 20 points.
Milwaukee was led by O.J. Mayo with 20. The Bucks have lost four in a row and remained stuck on two victories for the year.