Percy Marshall Young (17 May 1912 - 9 May 2004) was a British musicologist, editor, organist, composer, conductor and teacher.
Young was born in Northwich, Cheshire. From 1934 to 1937 he was a Director of Music at Stranmillis Teacher Training College in Belfast. From 1937 to 1944, Young was a Musical Adviser to Stoke-on-Trent Local Education Authority. After that, he became Director of Music at Wolverhampton College of Technology, a position he would occupy from 1944 to 1966. From 1998 until his death in 2004, Young was an Honorary Fellow of Selwyn College, Cambridge.
Young published more than 50 books. Among those are biographies of musicians such as Georg Friedrich Händel (1947), Vaughan Williams (1953), sir Edward Elgar (1955), Robert Schumann (1957), Zoltán Kodály (1964), Sir Arthur Sullivan (1971) and Sir George Grove (1980). He also wrote a series on composers such as George Frideric Handel, Wolfgang Amadeus Mozart, Ludwig van Beethoven and Benjamin Britten for younger readers.