Sir William Lamond Allardyce, GCMG (14 November 1861 – 9 June 1930) was a career British civil servant in the Colonial Office who served as governor of Fiji (1901–1902), the Falkland Islands (1904–1914), Bahamas (1914–1920), Tasmania (1920–1922), and Newfoundland (1922–1928).

Educated in Aberdeen, Scotland and at Oxford Military College, at the age of 18, he joined the British Civil Service in the Colonial Office.

He was the official Crown representative of the unveiling of the National War Memorial by Field Marshal the Earl Haig on 1 July 1924.

Allardyce as governor was a key promoter in the decision awarding jurisdiction over most of the Labrador Peninsula to Newfoundland by the Privy Council.

Allardyce was noted as one of the most competent administrators ever appointed by the Colonial Office to serve as the official representative of the British Crown in Newfoundland and Labrador.