Barnabas Gunn (c. 1680 – 6 February 1753) was an English organist and composer. Gunn's date and place of birth are unknown, but he was appointed organist of the newly built St Philip's Church (now St Philip's Cathedral) in Birmingham in 1715. He spent nine years as the organist of Gloucester Cathedral from 1730, returning to Birmingham as organist of both St Philip's and St Martin in the Bull Ring in 1740, remaining there until his death. Gunn's compositions included cantatas, songs, psalms and instrumental music for strings.