Daniel Gillmor (July 1, 1849 – February 22, 1918) was a merchant and political figure in New Brunswick, Canada.
He sat for St. George division in the Senate of Canada from 1907 to 1918 as a Liberal.
He was born in St. George, New Brunswick, the son of Arthur Hill Gillmor and Hannah Dawes Howe.
Daniel married Catherine Sophia Duffy on 28 Nov 1877 in Lowell, Middlesex, Massachusetts.
He ran unsuccessfully for a seat in the House of Commons in 1904.