William Adamson (1863–1936) was a Scottish politician and chairman of the British Labour Party.
William Adamson may also refer to: William Adamson (Australian politician) (1858–1924), Australian politician from Victoria William Adamson (businessman) (1832–1917), British businessman and member of the Legislative Council in Singapore William Adamson (Cannock MP) (1881–1945), British Labour politician William Adamson (Wisconsin politician) (1834–1907), American politician from Wisconsin William Agar Adamson (1800–1868), Canadian clergyman and author William C. Adamson (1854–1929), American politician and judge from Georgia Sir William Owen Campbell Adamson (1922–2000), British industrialist William Stuart Adamson (1958–2001), Scottish guitarist, vocalist, and songwriter Billy Adamson (1944–2013), Scottish musician
See also William Adamson, character in Angels & Insects