Andreas Karl Johnsson (born 21 November 1994) is a Swedish professional ice hockey winger for Skellefteå AIK of the Swedish Hockey League (SHL). Johnsson played with the Toronto Maple Leafs, New Jersey Devils, San Jose Sharks, and Pittsburgh Penguins in the National Hockey League (NHL). He was selected by the Toronto Maple Leafs in the seventh round, 202nd overall, of the 2013 NHL Entry Draft.

Johansson won the SHL's Le Mat trophy championship with Frölunda in 2016 and Skellefteå AIK in 2024. He was also a 2018 Calder Cup champion with the Toronto Marlies.

Johnsson was born on 21 November 1994 in Gävle, Sweden. He is the youngest son of former ice hockey player Jonas Johnson. Andreas' older brother Jonathan is also an ice hockey player, who plays for Skellefteå AIK.

Johnsson made his Elitserien debut for Frölunda HC on 18 December 2012 in a home game against AIK IF. In his second game, on 26 December at Rögle BK, Johnsson scored his first career Elitserien goal, the game-winning goal in the shootout.

On 21 April 2014, Johnsson was named the SHL Rookie of the Year, beating out Frölunda teammates Alexander Wennberg and fellow Maple Leafs prospect Tom Nilsson, as well as HV71's Kevin Fiala.

During the 2014–15 season, Johnsson led Frölunda in goals with 22, also contributing 13 assists for 35 points from 55 regular season games played. On 4 June 2015, the Maple Leafs signed Johnsson to a three-year, entry-level contract.

The following season was another sensational year for Johnsson, in which he finished sixth in league scoring and helped Frölunda capture their fourth championship. Having stated this would be his last season in Sweden and wanting to begin his North American development, Johnsson debuted for the Toronto Marlies—the Maple Leafs' American Hockey League (AHL) affiliate—shortly afterwards in order to assist their Calder Cup playoff run. However, his stint was cut short, as in his second North American game, Johnsson was hit in the head by an elbow from Albany Devils player Dan Kelly. Kelly was suspended ten games for the play and Johnsson would not play another game that season.

During the 2017–18 season, Johnsson was named to the 2018 AHL All-Star Game as a replacement for fellow Maple Leafs prospect Kasperi Kapanen, who was called up to the NHL. On 13 March 2018, Johnsson was called up to the Maple Leafs alongside Calle Rosén. While Rosén was sent back down, Johnsson made his NHL debut on 14 March in a 6–5 win over the Dallas Stars. He recorded his first NHL goal in the following game against the Montreal Canadiens, a 4–0 victory. Johnsson recorded his first multi-point game on 2 April 2018 in a 5–2 win over the Buffalo Sabres. Near the conclusion of the 2017–18 regular season, Johnsson was selected for the AHL's Second All-Star team. Johnsson made his NHL playoff debut during the 2018 Stanley Cup playoffs against the Boston Bruins and recorded his first playoff goal on 21 April to help the Leafs win 4–3. After the Leafs were eliminated from the playoffs, Johnsson was sent down to the Marlies to help them in their 2018 Calder Cup playoff run. After leading all players in points during the playoffs, Johnsson was awarded the Jack Butterfield Trophy as MVP of the Calder Cup. As a restricted free agent entering the off-season, Johnsson accepted his qualifying offer from the Maple Leafs, signing a one-year, two-way contract worth $787,500.