Daniel Webster Warner (October 1, 1857 – May 14, 1933) was a farmer, rancher and Canadian federal politician.Warner first ran for a seat in the Canadian House of Commons in the 1917 Canadian federal election in the Battle River district. He ran in that election as a Laurier Liberal candidate and was defeated in a close race by Unionist candidate William John Blair. Warner would run again in the 1921 Canadian federal election this time as a Progressive Party of Canada candidate.