David Blain (August 12, 1832 – May 6, 1909) was a Scottish-born Canadian lawyer, teacher and political figure.

He represented York West in the House of Commons of Canada from 1872 to 1878 as a Liberal member.

[1] He was born near Ayr,[1] the son of John Blain and Elizabeth McCutcheon, and came to Canada West with his parents in 1842.

[2] Blain was called to the bar in 1860 and set up practice in Toronto, partnering for a time with Albert Prince.

[1] He retired from politics afterwards, and died in Toronto at the age of 76 in 1909.