Duncan Sinclair may refer to:
- Duncan Sinclair (Conservative politician) (1869–1951), Conservative member of the Canadian House of Commons
- Duncan James Sinclair (1867–1943), Liberal party member of the Canadian House of Commons
- Duncan G. Sinclair (born 1933), American-born Canadian academic
This disambiguation page lists articles about people with the same name.
If an internal link led you here, you may wish to change the link to point directly to the intended article.
If an internal link led you here, you may wish to change the link to point directly to the intended article.