John Weldon was an English composer. Born at Chichester in the south of England, he was educated at Eton, where he was a chorister, and later received musical instruction from Henry Purcell. By 1694 Weldon had been appointed organist of New College in Oxford and became well known in the musical life of that city, writing music for masques as well as performing his organist duties. Some believe he set Shakespeare's play The Tempest to music in 1695, although others attribute that to Henry Purcell.