Young finished 12 of 24 from the field, including 5 of 12 from 3-point range, and had one turnover in 31 minutes.
DeAndre' Bembry and Dewayne Dedmon each scored 18 points, and the Hawks shot 19 for 51 from beyond the arc to win their third straight.
Julius Randle led the Pelicans with 24 points and nine rebounds.
Already playing without Anthony Davis and Jrue Holiday, the Pelicans' lineup got thinner when guard Frank Jackson, who scored 20 points in 25 minutes, went to the locker room with a concussion with 7:19 left in the third quarter. He was inadvertently hit in the forehead by John Collins while under the basket.
Young scored 16 points in the first half, hitting an assortment of floaters in the lane and went 3 of 6 from long distance as the Hawks jumped out to a 70-57 halftime lead.
Young scored 10 points in the first quarter as the Hawks tied their season high with 42 point in the period. They shot 15 of 28 from the field, including 7 of 14 from 3-point range, and used an 11-4 run over the final 2:22 of the frame to take a 42-34 lead.
The play of recently acquired reserve forward Christian Wood was a highlight for the Pelicans. Wood had 11 points and five rebounds in 11 minutes in the first half, and finished with a career-high 23 points.
Wood signed with the Pelicans on March 20 after being released by the Milwaukee Bucks
Hawks: C Miles Plumlee will undergo arthroscopic surgery on April 2 to repair torn cartilage in his left knee. He will miss the rest of the season. . Including a 42-point first quarter against the Pelicans, the Hawks have scored at least 40 points in a quarter 13 times this season, the most since 1970-71. The Hawks have led the NBA in scoring since the All-Star break (120.5) and have gone 8-9. . In the last four games, rookie G Trae Young has averaged 26.8 points and 11.5 assists.
Pelicans: G Jrue Holiday underwent surgery in Philadelphia on Tuesday to repair a core muscle injury. Dr. William Meyers said the surgery went well. Holiday can return to basketball activities in six weeks. . Anthony Davis sat out the game with lower back spasms. . F Cheick Diallo made his first NBA start in three seasons.
Hawks: Hosts Portland on Friday night.
Pelicans: Host Sacramento on Thursday night in the third game of a five-game homestand.