William M. Blair (May 25, 1836 – June 17, 1919) was a farmer and political figure in Nova Scotia, Canada.
He represented Colchester County in the Nova Scotia House of Assembly from 1878 to 1886 as a Liberal-Conservative member.
Blair was an ardent promoter of modern farming, and was deeply involved in agricultural reform efforts in Nova Scotia.
Most substantively, Blair was the first supervisor of the federally funded Experimental Farm in Nappan, Nova Scotia, heading it from its creation in 1887 until his retirement in 1896.
[1][2] His son was William Saxby Blair who followed in his father's footsteps in agricultural promotion, being the first supervisor of the Experimental Farm in Kentville, Nova Scotia from its creation in 1912 until his retirement in 1938.