Howard Chandler Robbins Landon (March 6, 1926 – November 20, 2009) was an American musicologist, journalist, historian and broadcaster, best known for his work in rediscovering the huge body of neglected music by Haydn and in correcting misunderstandings about Mozart.

The son of a musician, Landon became enthusiastic about Haydn's compositions in high school and was eager to pursue a career in Haydn scholarship. He studied with, among others, Karl Geiringer, an authority on Haydn, graduating with a music degree in 1947. He moved to Europe, where he lived for the rest of his life. He co-founded the Haydn Society in 1949, the goal of which was to publish and record Haydn's works. Gaining access to archives in countries throughout Europe, he spent decades researching the life and works of Haydn. He rescued, published critical editions of, wrote books about, and with the society arranged for the recording of, numerous forgotten works. He finally published his five-volume study, Haydn: Chronicle and Works, between 1976 and 1980.

In addition to his work on Haydn, Landon and the society recorded neglected works of Mozart, and he published five popular books about Mozart, dispelling myths about the composer's life. He had written 28 books by 1996. Landon also wrote regularly for music magazines and newspapers, especially the longest-established London paper, The Times. He was a popular broadcaster for the BBC on radio and television and was praised for his ability to enthuse general audiences with his chosen subject. From the 1970s, he was a sought-after lecturer and held appointments with colleges in the US and the UK.