About Duncan Sinclair
Lived 1869 – 1951 (aged 82). Duncan Sinclair was a Canadian politician, salesperson and gentleman.
Duncan Sinclair (29 January 1869 – 21 June 1951) was a Conservative member of the House of Commons of Canada. He was born in Minto Township, Ontario and became a salesman.
He was first elected to Parliament at the Wellington North riding in the 1925 general election, then re-elected there in 1926. Sinclair was defeated by John Knox Blair of the Liberals in the 1930 federal election. Sinclair made an unsuccessful bid to unseat Knox in the 1935 election.
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Important facts
People in Duncan Sinclair's life
Named in this biography and alive at the same time
Related people
Same field, nearest in time
Contemporaries
People whose lives overlapped Duncan Sinclair's
Frequently asked questions
Who was Duncan Sinclair?
Canadian politician (1869–1951)
When was Duncan Sinclair born?
Duncan Sinclair was born on 29 January 1869 in Minto.
When did Duncan Sinclair die?
Duncan Sinclair died on 21 June 1951.
What was Duncan Sinclair's occupation?
Duncan Sinclair was a politician, salesperson and gentleman.
What nationality was Duncan Sinclair?
Duncan Sinclair was Canadian.
Sources & further reading
· DBpedia: Duncan Sinclair (Conservative politician)
Cite this page
APA: Biography.guide. (2026). Duncan Sinclair. https://biography.guide/duncan-sinclair/
MLA: "Duncan Sinclair." Biography.guide, https://biography.guide/duncan-sinclair/.
Chicago: "Duncan Sinclair." Biography.guide. https://biography.guide/duncan-sinclair/.
Data last updated: 2026-09-20 · Spot an error? Report a correction.
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