John Francis Mason (1 September 1938 – 10 August 2016), known by his stage name Ralph Mason, was an English singer best remembered for his performances in leading tenor roles with the D'Oyly Carte Opera Company in the 1960s and 1970s.
After service in the British army, ultimately as the personal secretary to Field Marshal Montgomery, Mason began a professional singing career in 1959, joining D'Oyly Carte later that year.
From 1963 to 1965, he appeared in My Fair Lady, sometimes in the role of Freddie.
He rejoined D'Oyly Carte from 1965 to 1973, becoming principal tenor.
He then played Major Mark Blake in Coronation Street, returned briefly to D'Oyly Carte as a guest artist, and sang in concerts.
In 1977 Mason joined Welsh National Opera as a chorister and small part player, where he remained until his retirement in 2003.