John McCusker is a Scottish folk musician, record producer, and composer. He had a long association as a member of Battlefield Band beginning in the 1990s and was later a band member and producer for folk singer Kate Rusby. He has served as producer and arranger for various artists. He has also released several solo albums.

Battlefield Band is a Scottish traditional music group. Founded in Glasgow in 1969, they have released over 30 albums and undergone many changes of lineup. As of 2010, none of the original founders remain in the band.