Mjallby AIF U19

Mjällby Allmänna Idrottsförening, also known simply as Mjällby AIF, Mjällby or (especially locally) MAIF, is a Swedish professional football club based in Hällevik in Sölvesborg Municipality. The club is affiliated to Blekinge Fotbollförbund and play its home games at Strandvallen. The club colours, reflected in their crest and kit, are yellow and black. Formed on 1 April 1939, the club have played eight seasons in Sweden's highest football league Allsvenskan, the club's first season in the league was in 1980. The club are currently playing in Allsvenskan (top division). With nine seasons in the top division Allsvenskan, Mjällby AIF is the most successful football team from the province of Blekinge.

Former Sweden national football team players Christian Wilhelmsson and Mattias Asper began their careers at the club. Both players also ended their playing careers in Mjällby.

On 11 May 2023, Mjällby AIF played the Swedish Cup final at Strandvallen, losing 1–4 to BK Häcken.