Melker Hallberg (born 20 October 1995) is a Swedish professional footballer who plays as a midfielder for Kalmar FF.

He made his full international debut for the Sweden national team in 2016, and has won a total of three caps and scored one goal.

There he started with the local club Möre BK where he played for the first team in the seventh tier of Swedish football at age thirteen.

Two years later he became the youngest-ever first-team player for the club when he made his Allsvenskan debut at the age of sixteen.

[3] On July 15, 2012, Hallberg became the fourth-youngest Allsvenskan goalscorer of all time when he scored the game-winning 2–1 goal against IF Elfsborg.