Major Ralph George Campbell Glyn, 1st Baron Glyn, Bt, MC, DL (3 March 1884 – 1 May 1960), known as Sir Ralph Glyn, 1st Baronet, from 1934 to 1953, was a soldier and Conservative Party politician in the United Kingdom. He was a Member of Parliament (MP) from 1918 to 1922, and from 1924 to 1953.