Sir Landon Ronald (born Landon Ronald Russell) (7 June 1873 – 14 August 1938) was an English conductor, composer, pianist, teacher and administrator.

In his early career he gained work as an accompanist and répétiteur, but struggled to make his way as a conductor. In the absence of operatic or symphonic work he made his living as a conductor and composer in West End shows in the late 19th and early 20th century. With the foundation of the London Symphony Orchestra in 1904 his career began to flourish, and by 1908 he was well-enough established to be chosen to succeed Thomas Beecham as conductor of the New Symphony Orchestra in London.

Ronald was an early enthusiast for recording, and was associated with the Gramophone Company (later part of EMI) from 1900 for the rest of his life.

From 1910 until shortly before his death, Ronald was principal of the Guildhall School of Music in London. He modernised the curriculum and raised its standards to compete with the leading musical training establishments the Royal Academy of Music and the Royal College of Music.